em28xx broken 4.9.0-rc6+

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* em28xx broken 4.9.0-rc6+
@ 2016-12-05 23:06 Antti Palosaari
  2016-12-06 15:41 ` Mauro Carvalho Chehab
  0 siblings, 1 reply; 6+ messages in thread
From: Antti Palosaari @ 2016-12-05 23:06 UTC (permalink / raw)
  To: LMML, Mauro Carvalho Chehab

Hello Mauro
I just noticed current em28xx driver seem to be broken. When I plug 
device first time it loads correctly, but when I re-plug it, it does not 
work anymore but yells a lot of noise to message log. Tested with PCTV 
290e and 292e both same. Other USB DVB devices are working so it is very 
likely em28xx driver bug.

Easy to reproduce:
plug device
unplug device
plug device

regards
Antti

-- 
http://palosaari.fi/

^ permalink raw reply	[flat|nested] 6+ messages in thread

* Re: em28xx broken 4.9.0-rc6+
  2016-12-05 23:06 em28xx broken 4.9.0-rc6+ Antti Palosaari
@ 2016-12-06 15:41 ` Mauro Carvalho Chehab
  2016-12-07 14:22   ` Mauro Carvalho Chehab
  0 siblings, 1 reply; 6+ messages in thread
From: Mauro Carvalho Chehab @ 2016-12-06 15:41 UTC (permalink / raw)
  To: Antti Palosaari; +Cc: LMML

Em Tue, 6 Dec 2016 01:06:17 +0200
Antti Palosaari <crope@iki.fi> escreveu:

> Hello Mauro
> I just noticed current em28xx driver seem to be broken. When I plug 
> device first time it loads correctly, but when I re-plug it, it does not 
> work anymore but yells a lot of noise to message log. Tested with PCTV 
> 290e and 292e both same. Other USB DVB devices are working so it is very 
> likely em28xx driver bug.
> 
> Easy to reproduce:
> plug device
> unplug device
> plug device


Are you referring to those:

[ 1010.310320] WARNING: CPU: 3 PID: 119 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x7b/0x90
[ 1010.310323] sysfs: cannot create duplicate filename '/bus/usb/devices/1-3.3'
[ 1010.310325] Modules linked in: lgdt330x em28xx_dvb dvb_core em28xx_alsa tuner_xc2028 tuner tvp5150 em28xx_v4l videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core em28xx tveeprom v4l2_common videodev media xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp tun bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter ip_tables x_tables cmac bnep cpufreq_powersave cpufreq_conservative cpufreq_userspace binfmt_misc parport_pc ppdev lp parport snd_hda_codec_hdmi iTCO_wdt snd_hda_codec_realtek iTCO_vendor_support snd_hda_codec_generic arc4 intel_rapl x86_pkg_temp_thermal iwlmvm intel_powerclamp coretemp kvm_intel mac80211 kvm i915
[ 1010.310383]  irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel iwlwifi pl2303 aesni_intel btusb aes_x86_64 usbserial lrw btrtl gf128mul glue_helper btbcm ablk_helper cryptd btintel bluetooth drm_kms_helper cfg80211 drm psmouse pcspkr i2c_i801 e1000e serio_raw snd_hda_intel snd_soc_rt5640 snd_hda_codec snd_soc_rl6231 snd_soc_ssm4567 mei_me i2c_smbus rfkill snd_hda_core ptp mei snd_soc_core ehci_pci sg lpc_ich shpchp mfd_core ehci_hcd pps_core snd_hwdep i2c_algo_bit snd_compress snd_pcm sdhci_acpi snd_timer battery snd sdhci elan_i2c snd_soc_sst_acpi mmc_core fjes dw_dmac i2c_hid soundcore snd_soc_sst_match i2c_designware_platform video i2c_designware_core acpi_pad acpi_als kfifo_buf tpm_tis button industrialio tpm_tis_core tpm ext4 crc16 jbd2 fscrypto mbcache dm_mod joydev evdev hid_logitech_hidpp
[ 1010.310449]  sd_mod hid_logitech_dj usbhid hid ahci libahci crc32c_intel libata xhci_pci xhci_hcd scsi_mod usbcore fan thermal
[ 1010.310464] CPU: 3 PID: 119 Comm: kworker/3:2 Not tainted 4.9.0-rc8+ #14
[ 1010.310466] Hardware name:                  /NUC5i7RYB, BIOS RYBDWi35.86A.0350.2015.0812.1722 08/12/2015
[ 1010.310487] Workqueue: usb_hub_wq hub_event [usbcore]
[ 1010.310490]  0000000000000000 ffffffff848f56c5 ffff8803b1f7f858 0000000000000000
[ 1010.310496]  ffffffff8414f8f8 ffff88030000001f ffffed00763eff07 ffff8803b1f7f8f0
[ 1010.310501]  ffff8803b3ea1e60 0000000000000001 ffffffffffffffef ffff8803b45c6840
[ 1010.310505] Call Trace:
[ 1010.310517]  [<ffffffff848f56c5>] ? dump_stack+0x5c/0x77
[ 1010.310522]  [<ffffffff8414f8f8>] ? __warn+0x168/0x1a0
[ 1010.310526]  [<ffffffff8414f9e4>] ? warn_slowpath_fmt+0xb4/0xf0
[ 1010.310529]  [<ffffffff8414f930>] ? __warn+0x1a0/0x1a0
[ 1010.310534]  [<ffffffff845436c6>] ? kasan_kmalloc+0xa6/0xd0
[ 1010.310539]  [<ffffffff846ec2fa>] ? kernfs_path_from_node+0x4a/0x60
[ 1010.310543]  [<ffffffff846f66eb>] ? sysfs_warn_dup+0x7b/0x90
[ 1010.310547]  [<ffffffff846f6f26>] ? sysfs_do_create_link_sd.isra.2+0xb6/0xd0
[ 1010.310553]  [<ffffffff84cd5a08>] ? bus_add_device+0x318/0x6b0
[ 1010.310557]  [<ffffffff846f8693>] ? sysfs_create_groups+0x83/0x110
[ 1010.310562]  [<ffffffff84ccff87>] ? device_add+0x777/0x1350
[ 1010.310567]  [<ffffffff84ccf810>] ? device_private_init+0x180/0x180
[ 1010.310583]  [<ffffffffc00c0f77>] ? usb_new_device+0x707/0x1030 [usbcore]
[ 1010.310598]  [<ffffffffc00c58c5>] ? hub_event+0x1d65/0x3280 [usbcore]
[ 1010.310604]  [<ffffffff841eb4ab>] ? account_entity_dequeue+0x30b/0x4a0
[ 1010.310618]  [<ffffffffc00c3b60>] ? hub_port_debounce+0x280/0x280 [usbcore]
[ 1010.310624]  [<ffffffff8407ccd0>] ? compat_start_thread+0x80/0x80
[ 1010.310629]  [<ffffffff851f5cb4>] ? __schedule+0x704/0x1770
[ 1010.310633]  [<ffffffff851f55b0>] ? io_schedule_timeout+0x390/0x390
[ 1010.310638]  [<ffffffff84541783>] ? cache_reap+0x173/0x200
[ 1010.310642]  [<ffffffff84197bed>] ? process_one_work+0x4ed/0xe60
[ 1010.310646]  [<ffffffff84198642>] ? worker_thread+0xe2/0xfd0
[ 1010.310650]  [<ffffffff8421f76c>] ? __wake_up_common+0xbc/0x160
[ 1010.310654]  [<ffffffff84198560>] ? process_one_work+0xe60/0xe60
[ 1010.310658]  [<ffffffff841a837c>] ? kthread+0x1cc/0x220
[ 1010.310663]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
[ 1010.310667]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
[ 1010.310671]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
[ 1010.310675]  [<ffffffff852016f5>] ? ret_from_fork+0x25/0x30
[ 1010.310698] ---[ end trace 49b46eb633ff1197 ]---
[ 1010.311298] usb 1-3.3: can't device_add, error -17
[ 1010.390703] usb 1-3.3: new high-speed USB device number 9 using xhci_hcd
[ 1010.496337] usb 1-3.3: New USB device found, idVendor=2040, idProduct=6513
[ 1010.496343] usb 1-3.3: New USB device strings: Mfr=0, Product=1, SerialNumber=2
[ 1010.496345] usb 1-3.3: Product: WinTV HVR-980
[ 1010.496347] usb 1-3.3: SerialNumber: 4028449018
[ 1010.497259] ------------[ cut here ]------------
[ 1010.497264] WARNING: CPU: 3 PID: 119 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x7b/0x90
[ 1010.497266] sysfs: cannot create duplicate filename '/bus/usb/devices/1-3.3'
[ 1010.497267] Modules linked in: lgdt330x em28xx_dvb dvb_core em28xx_alsa tuner_xc2028 tuner tvp5150 em28xx_v4l videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core em28xx tveeprom v4l2_common videodev media xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp tun bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter ip_tables x_tables cmac bnep cpufreq_powersave cpufreq_conservative cpufreq_userspace binfmt_misc parport_pc ppdev lp parport snd_hda_codec_hdmi iTCO_wdt snd_hda_codec_realtek iTCO_vendor_support snd_hda_codec_generic arc4 intel_rapl x86_pkg_temp_thermal iwlmvm intel_powerclamp coretemp kvm_intel mac80211 kvm i915
[ 1010.497307]  irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel iwlwifi pl2303 aesni_intel btusb aes_x86_64 usbserial lrw btrtl gf128mul glue_helper btbcm ablk_helper cryptd btintel bluetooth drm_kms_helper cfg80211 drm psmouse pcspkr i2c_i801 e1000e serio_raw snd_hda_intel snd_soc_rt5640 snd_hda_codec snd_soc_rl6231 snd_soc_ssm4567 mei_me i2c_smbus rfkill snd_hda_core ptp mei snd_soc_core ehci_pci sg lpc_ich shpchp mfd_core ehci_hcd pps_core snd_hwdep i2c_algo_bit snd_compress snd_pcm sdhci_acpi snd_timer battery snd sdhci elan_i2c snd_soc_sst_acpi mmc_core fjes dw_dmac i2c_hid soundcore snd_soc_sst_match i2c_designware_platform video i2c_designware_core acpi_pad acpi_als kfifo_buf tpm_tis button industrialio tpm_tis_core tpm ext4 crc16 jbd2 fscrypto mbcache dm_mod joydev evdev hid_logitech_hidpp
[ 1010.497352]  sd_mod hid_logitech_dj usbhid hid ahci libahci crc32c_intel libata xhci_pci xhci_hcd scsi_mod usbcore fan thermal
[ 1010.497362] CPU: 3 PID: 119 Comm: kworker/3:2 Tainted: G        W       4.9.0-rc8+ #14
[ 1010.497363] Hardware name:                  /NUC5i7RYB, BIOS RYBDWi35.86A.0350.2015.0812.1722 08/12/2015
[ 1010.497377] Workqueue: usb_hub_wq hub_event [usbcore]
[ 1010.497379]  0000000000000000 ffffffff848f56c5 ffff8803b1f7f858 0000000000000000
[ 1010.497382]  ffffffff8414f8f8 ffff88030000001f ffffed00763eff07 ffff8803b1f7f8f0
[ 1010.497385]  ffff8803b3ea1e60 0000000000000001 ffffffffffffffef ffff8803b45c6840
[ 1010.497387] Call Trace:
[ 1010.497395]  [<ffffffff848f56c5>] ? dump_stack+0x5c/0x77
[ 1010.497398]  [<ffffffff8414f8f8>] ? __warn+0x168/0x1a0
[ 1010.497400]  [<ffffffff8414f9e4>] ? warn_slowpath_fmt+0xb4/0xf0
[ 1010.497402]  [<ffffffff8414f930>] ? __warn+0x1a0/0x1a0
[ 1010.497405]  [<ffffffff845436c6>] ? kasan_kmalloc+0xa6/0xd0
[ 1010.497408]  [<ffffffff846ec2fa>] ? kernfs_path_from_node+0x4a/0x60
[ 1010.497410]  [<ffffffff846f66eb>] ? sysfs_warn_dup+0x7b/0x90
[ 1010.497412]  [<ffffffff846f6f26>] ? sysfs_do_create_link_sd.isra.2+0xb6/0xd0
[ 1010.497416]  [<ffffffff84cd5a08>] ? bus_add_device+0x318/0x6b0
[ 1010.497419]  [<ffffffff846f8693>] ? sysfs_create_groups+0x83/0x110
[ 1010.497421]  [<ffffffff84ccff87>] ? device_add+0x777/0x1350
[ 1010.497424]  [<ffffffff84ccf810>] ? device_private_init+0x180/0x180
[ 1010.497433]  [<ffffffffc00c0f77>] ? usb_new_device+0x707/0x1030 [usbcore]
[ 1010.497441]  [<ffffffffc00c58c5>] ? hub_event+0x1d65/0x3280 [usbcore]
[ 1010.497445]  [<ffffffff841eb4ab>] ? account_entity_dequeue+0x30b/0x4a0
[ 1010.497454]  [<ffffffffc00c3b60>] ? hub_port_debounce+0x280/0x280 [usbcore]
[ 1010.497457]  [<ffffffff8407ccd0>] ? compat_start_thread+0x80/0x80
[ 1010.497460]  [<ffffffff851f5cb4>] ? __schedule+0x704/0x1770
[ 1010.497462]  [<ffffffff851f55b0>] ? io_schedule_timeout+0x390/0x390
[ 1010.497465]  [<ffffffff84541783>] ? cache_reap+0x173/0x200
[ 1010.497468]  [<ffffffff84197bed>] ? process_one_work+0x4ed/0xe60
[ 1010.497470]  [<ffffffff84198642>] ? worker_thread+0xe2/0xfd0
[ 1010.497473]  [<ffffffff8421f76c>] ? __wake_up_common+0xbc/0x160
[ 1010.497475]  [<ffffffff84198560>] ? process_one_work+0xe60/0xe60
[ 1010.497477]  [<ffffffff841a837c>] ? kthread+0x1cc/0x220
[ 1010.497480]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
[ 1010.497482]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
[ 1010.497485]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
[ 1010.497487]  [<ffffffff852016f5>] ? ret_from_fork+0x25/0x30
[ 1010.497489] ---[ end trace 49b46eb633ff1198 ]---
[ 1010.497829] usb 1-3.3: can't device_add, error -17
[ 1010.578707] usb 1-3.3: new high-speed USB device number 10 using xhci_hcd
[ 1010.604448] usb 1-3.3: New USB device found, idVendor=2040, idProduct=6513
[ 1010.604452] usb 1-3.3: New USB device strings: Mfr=0, Product=1, SerialNumber=2
[ 1010.604454] usb 1-3.3: Product: WinTV HVR-980
[ 1010.604456] usb 1-3.3: SerialNumber: 4028449018
[ 1010.605369] ------------[ cut here ]------------
[ 1010.605374] WARNING: CPU: 3 PID: 119 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x7b/0x90
[ 1010.605375] sysfs: cannot create duplicate filename '/bus/usb/devices/1-3.3'
[ 1010.605376] Modules linked in: lgdt330x em28xx_dvb dvb_core em28xx_alsa tuner_xc2028 tuner tvp5150 em28xx_v4l videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core em28xx tveeprom v4l2_common videodev media xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp tun bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter ip_tables x_tables cmac bnep cpufreq_powersave cpufreq_conservative cpufreq_userspace binfmt_misc parport_pc ppdev lp parport snd_hda_codec_hdmi iTCO_wdt snd_hda_codec_realtek iTCO_vendor_support snd_hda_codec_generic arc4 intel_rapl x86_pkg_temp_thermal iwlmvm intel_powerclamp coretemp kvm_intel mac80211 kvm i915
[ 1010.605415]  irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel iwlwifi pl2303 aesni_intel btusb aes_x86_64 usbserial lrw btrtl gf128mul glue_helper btbcm ablk_helper cryptd btintel bluetooth drm_kms_helper cfg80211 drm psmouse pcspkr i2c_i801 e1000e serio_raw snd_hda_intel snd_soc_rt5640 snd_hda_codec snd_soc_rl6231 snd_soc_ssm4567 mei_me i2c_smbus rfkill snd_hda_core ptp mei snd_soc_core ehci_pci sg lpc_ich shpchp mfd_core ehci_hcd pps_core snd_hwdep i2c_algo_bit snd_compress snd_pcm sdhci_acpi snd_timer battery snd sdhci elan_i2c snd_soc_sst_acpi mmc_core fjes dw_dmac i2c_hid soundcore snd_soc_sst_match i2c_designware_platform video i2c_designware_core acpi_pad acpi_als kfifo_buf tpm_tis button industrialio tpm_tis_core tpm ext4 crc16 jbd2 fscrypto mbcache dm_mod joydev evdev hid_logitech_hidpp
[ 1010.605459]  sd_mod hid_logitech_dj usbhid hid ahci libahci crc32c_intel libata xhci_pci xhci_hcd scsi_mod usbcore fan thermal
[ 1010.605469] CPU: 3 PID: 119 Comm: kworker/3:2 Tainted: G        W       4.9.0-rc8+ #14
[ 1010.605471] Hardware name:                  /NUC5i7RYB, BIOS RYBDWi35.86A.0350.2015.0812.1722 08/12/2015
[ 1010.605484] Workqueue: usb_hub_wq hub_event [usbcore]
[ 1010.605486]  0000000000000000 ffffffff848f56c5 ffff8803b1f7f858 0000000000000000
[ 1010.605490]  ffffffff8414f8f8 ffff88030000001f ffffed00763eff07 ffff8803b1f7f8f0
[ 1010.605492]  ffff8803b3ea1e60 0000000000000001 ffffffffffffffef ffff8803b45c6840
[ 1010.605495] Call Trace:
[ 1010.605502]  [<ffffffff848f56c5>] ? dump_stack+0x5c/0x77
[ 1010.605505]  [<ffffffff8414f8f8>] ? __warn+0x168/0x1a0
[ 1010.605508]  [<ffffffff8414f9e4>] ? warn_slowpath_fmt+0xb4/0xf0
[ 1010.605510]  [<ffffffff8414f930>] ? __warn+0x1a0/0x1a0
[ 1010.605513]  [<ffffffff845436c6>] ? kasan_kmalloc+0xa6/0xd0
[ 1010.605516]  [<ffffffff846ec2fa>] ? kernfs_path_from_node+0x4a/0x60
[ 1010.605518]  [<ffffffff846f66eb>] ? sysfs_warn_dup+0x7b/0x90
[ 1010.605520]  [<ffffffff846f6f26>] ? sysfs_do_create_link_sd.isra.2+0xb6/0xd0
[ 1010.605524]  [<ffffffff84cd5a08>] ? bus_add_device+0x318/0x6b0
[ 1010.605527]  [<ffffffff846f8693>] ? sysfs_create_groups+0x83/0x110
[ 1010.605529]  [<ffffffff84ccff87>] ? device_add+0x777/0x1350
[ 1010.605532]  [<ffffffff84ccf810>] ? device_private_init+0x180/0x180
[ 1010.605542]  [<ffffffffc00c0f77>] ? usb_new_device+0x707/0x1030 [usbcore]
[ 1010.605550]  [<ffffffffc00c58c5>] ? hub_event+0x1d65/0x3280 [usbcore]
[ 1010.605554]  [<ffffffff841eb4ab>] ? account_entity_dequeue+0x30b/0x4a0
[ 1010.605563]  [<ffffffffc00c3b60>] ? hub_port_debounce+0x280/0x280 [usbcore]
[ 1010.605566]  [<ffffffff8407ccd0>] ? compat_start_thread+0x80/0x80
[ 1010.605569]  [<ffffffff851f5cb4>] ? __schedule+0x704/0x1770
[ 1010.605572]  [<ffffffff851f55b0>] ? io_schedule_timeout+0x390/0x390
[ 1010.605574]  [<ffffffff84541783>] ? cache_reap+0x173/0x200
[ 1010.605577]  [<ffffffff84197bed>] ? process_one_work+0x4ed/0xe60
[ 1010.605579]  [<ffffffff84198642>] ? worker_thread+0xe2/0xfd0
[ 1010.605581]  [<ffffffff8421f76c>] ? __wake_up_common+0xbc/0x160
[ 1010.605584]  [<ffffffff84198560>] ? process_one_work+0xe60/0xe60
[ 1010.605586]  [<ffffffff841a837c>] ? kthread+0x1cc/0x220
[ 1010.605589]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
[ 1010.605591]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
[ 1010.605594]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
[ 1010.605596]  [<ffffffff852016f5>] ? ret_from_fork+0x25/0x30
[ 1010.605598] ---[ end trace 49b46eb633ff1199 ]---
[ 1010.605948] usb 1-3.3: can't device_add, error -17
[ 1010.686729] usb 1-3.3: new high-speed USB device number 11 using xhci_hcd
[ 1010.712761] usb 1-3.3: New USB device found, idVendor=2040, idProduct=6513
[ 1010.712768] usb 1-3.3: New USB device strings: Mfr=0, Product=1, SerialNumber=2
[ 1010.712772] usb 1-3.3: Product: WinTV HVR-980
[ 1010.712775] usb 1-3.3: SerialNumber: 4028449018
[ 1010.714339] ------------[ cut here ]------------
[ 1010.714347] WARNING: CPU: 3 PID: 119 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x7b/0x90
[ 1010.714349] sysfs: cannot create duplicate filename '/bus/usb/devices/1-3.3'
[ 1010.714351] Modules linked in: lgdt330x em28xx_dvb dvb_core em28xx_alsa tuner_xc2028 tuner tvp5150 em28xx_v4l videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core em28xx tveeprom v4l2_common videodev media xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp tun bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter ip_tables x_tables cmac bnep cpufreq_powersave cpufreq_conservative cpufreq_userspace binfmt_misc parport_pc ppdev lp parport snd_hda_codec_hdmi iTCO_wdt snd_hda_codec_realtek iTCO_vendor_support snd_hda_codec_generic arc4 intel_rapl x86_pkg_temp_thermal iwlmvm intel_powerclamp coretemp kvm_intel mac80211 kvm i915
[ 1010.714409]  irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel iwlwifi pl2303 aesni_intel btusb aes_x86_64 usbserial lrw btrtl gf128mul glue_helper btbcm ablk_helper cryptd btintel bluetooth drm_kms_helper cfg80211 drm psmouse pcspkr i2c_i801 e1000e serio_raw snd_hda_intel snd_soc_rt5640 snd_hda_codec snd_soc_rl6231 snd_soc_ssm4567 mei_me i2c_smbus rfkill snd_hda_core ptp mei snd_soc_core ehci_pci sg lpc_ich shpchp mfd_core ehci_hcd pps_core snd_hwdep i2c_algo_bit snd_compress snd_pcm sdhci_acpi snd_timer battery snd sdhci elan_i2c snd_soc_sst_acpi mmc_core fjes dw_dmac i2c_hid soundcore snd_soc_sst_match i2c_designware_platform video i2c_designware_core acpi_pad acpi_als kfifo_buf tpm_tis button industrialio tpm_tis_core tpm ext4 crc16 jbd2 fscrypto mbcache dm_mod joydev evdev hid_logitech_hidpp
[ 1010.714475]  sd_mod hid_logitech_dj usbhid hid ahci libahci crc32c_intel libata xhci_pci xhci_hcd scsi_mod usbcore fan thermal
[ 1010.714490] CPU: 3 PID: 119 Comm: kworker/3:2 Tainted: G        W       4.9.0-rc8+ #14
[ 1010.714493] Hardware name:                  /NUC5i7RYB, BIOS RYBDWi35.86A.0350.2015.0812.1722 08/12/2015
[ 1010.714513] Workqueue: usb_hub_wq hub_event [usbcore]
[ 1010.714517]  0000000000000000 ffffffff848f56c5 ffff8803b1f7f858 0000000000000000
[ 1010.714522]  ffffffff8414f8f8 ffff88030000001f ffffed00763eff07 ffff8803b1f7f8f0
[ 1010.714527]  ffff8803b3ea1e60 0000000000000001 ffffffffffffffef ffff8803b45c6840
[ 1010.714532] Call Trace:
[ 1010.714543]  [<ffffffff848f56c5>] ? dump_stack+0x5c/0x77
[ 1010.714547]  [<ffffffff8414f8f8>] ? __warn+0x168/0x1a0
[ 1010.714551]  [<ffffffff8414f9e4>] ? warn_slowpath_fmt+0xb4/0xf0
[ 1010.714555]  [<ffffffff8414f930>] ? __warn+0x1a0/0x1a0
[ 1010.714560]  [<ffffffff845436c6>] ? kasan_kmalloc+0xa6/0xd0
[ 1010.714565]  [<ffffffff846ec2fa>] ? kernfs_path_from_node+0x4a/0x60
[ 1010.714568]  [<ffffffff846f66eb>] ? sysfs_warn_dup+0x7b/0x90
[ 1010.714573]  [<ffffffff846f6f26>] ? sysfs_do_create_link_sd.isra.2+0xb6/0xd0
[ 1010.714579]  [<ffffffff84cd5a08>] ? bus_add_device+0x318/0x6b0
[ 1010.714583]  [<ffffffff846f8693>] ? sysfs_create_groups+0x83/0x110
[ 1010.714587]  [<ffffffff84ccff87>] ? device_add+0x777/0x1350
[ 1010.714592]  [<ffffffff84ccf810>] ? device_private_init+0x180/0x180
[ 1010.714608]  [<ffffffffc00c0f77>] ? usb_new_device+0x707/0x1030 [usbcore]
[ 1010.714623]  [<ffffffffc00c58c5>] ? hub_event+0x1d65/0x3280 [usbcore]
[ 1010.714628]  [<ffffffff841eb4ab>] ? account_entity_dequeue+0x30b/0x4a0
[ 1010.714643]  [<ffffffffc00c3b60>] ? hub_port_debounce+0x280/0x280 [usbcore]
[ 1010.714648]  [<ffffffff8407ccd0>] ? compat_start_thread+0x80/0x80
[ 1010.714653]  [<ffffffff851f5cb4>] ? __schedule+0x704/0x1770
[ 1010.714657]  [<ffffffff851f55b0>] ? io_schedule_timeout+0x390/0x390
[ 1010.714661]  [<ffffffff84541783>] ? cache_reap+0x173/0x200
[ 1010.714666]  [<ffffffff84197bed>] ? process_one_work+0x4ed/0xe60
[ 1010.714670]  [<ffffffff84198642>] ? worker_thread+0xe2/0xfd0
[ 1010.714674]  [<ffffffff8421f76c>] ? __wake_up_common+0xbc/0x160
[ 1010.714678]  [<ffffffff84198560>] ? process_one_work+0xe60/0xe60
[ 1010.714682]  [<ffffffff841a837c>] ? kthread+0x1cc/0x220
[ 1010.714686]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
[ 1010.714691]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
[ 1010.714695]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
[ 1010.714699]  [<ffffffff852016f5>] ? ret_from_fork+0x25/0x30
[ 1010.714719] ---[ end trace 49b46eb633ff119a ]---
[ 1010.715706] usb 1-3.3: can't device_add, error -17
[ 1010.716223] usb 1-3-port3: unable to enumerate USB device



If so, it seems that the device was not properly unregistered. That's
weird, since everything sounded ok at device unregister:

[  999.740335] usb 1-3.3: em2882!3#0: USB disconnect, device number 7
[  999.742857] usb 1-3.3: em2882!3#0: Disconnecting
[  999.742874] usb 1-3.3: em2882!3#0: Closing video extension
[  999.743058] usb 1-3.3: em2882!3#0: V4L2 device vbi0 deregistered
[  999.744327] usb 1-3.3: em2882!3#0: V4L2 device video0 deregistered
[  999.747938] tvp5150 6-005c: tvp5150.c: removing tvp5150 adapter on address 0xb8
[  999.750085] xc2028 6-0061: xc2028_dvb_release called
[  999.750852] usb 1-3.3: em2882!3#0: Closing audio extension
[  999.754253] usb 1-3.3: em2882!3#0: Closing DVB extension
[  999.760360] xc2028 6-0061: xc2028_dvb_release called
[  999.760362] xc2028 6-0061: free_firmware called
[  999.760958] xc2028 6-0061: destroying instance

I'll try to bisect this.

Regards,
Mauro


Thanks,
Mauro

^ permalink raw reply	[flat|nested] 6+ messages in thread

* Re: em28xx broken 4.9.0-rc6+
  2016-12-06 15:41 ` Mauro Carvalho Chehab
@ 2016-12-07 14:22   ` Mauro Carvalho Chehab
  2016-12-07 14:55     ` Mauro Carvalho Chehab
  0 siblings, 1 reply; 6+ messages in thread
From: Mauro Carvalho Chehab @ 2016-12-07 14:22 UTC (permalink / raw)
  To: Antti Palosaari; +Cc: LMML

Em Tue, 6 Dec 2016 13:41:38 -0200
Mauro Carvalho Chehab <mchehab@s-opensource.com> escreveu:

> Em Tue, 6 Dec 2016 01:06:17 +0200
> Antti Palosaari <crope@iki.fi> escreveu:
> 
> > Hello Mauro
> > I just noticed current em28xx driver seem to be broken. When I plug 
> > device first time it loads correctly, but when I re-plug it, it does not 
> > work anymore but yells a lot of noise to message log. Tested with PCTV 
> > 290e and 292e both same. Other USB DVB devices are working so it is very 
> > likely em28xx driver bug.
> > 
> > Easy to reproduce:
> > plug device
> > unplug device
> > plug device
> 
> 
> Are you referring to those:
> 
> [ 1010.310320] WARNING: CPU: 3 PID: 119 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x7b/0x90
> [ 1010.310323] sysfs: cannot create duplicate filename '/bus/usb/devices/1-3.3'
> [ 1010.310325] Modules linked in: lgdt330x em28xx_dvb dvb_core em28xx_alsa tuner_xc2028 tuner tvp5150 em28xx_v4l videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core em28xx tveeprom v4l2_common videodev media xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp tun bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter ip_tables x_tables cmac bnep cpufreq_powersave cpufreq_conservative cpufreq_userspace binfmt_misc parport_pc ppdev lp parport snd_hda_codec_hdmi iTCO_wdt snd_hda_codec_realtek iTCO_vendor_support snd_hda_codec_generic arc4 intel_rapl x86_pkg_temp_thermal iwlmvm intel_powerclamp coretemp kvm_intel mac80211 kvm i915
> [ 1010.310383]  irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel iwlwifi pl2303 aesni_intel btusb aes_x86_64 usbserial lrw btrtl gf128mul glue_helper btbcm ablk_helper cryptd btintel bluetooth drm_kms_helper cfg80211 drm psmouse pcspkr i2c_i801 e1000e serio_raw snd_hda_intel snd_soc_rt5640 snd_hda_codec snd_soc_rl6231 snd_soc_ssm4567 mei_me i2c_smbus rfkill snd_hda_core ptp mei snd_soc_core ehci_pci sg lpc_ich shpchp mfd_core ehci_hcd pps_core snd_hwdep i2c_algo_bit snd_compress snd_pcm sdhci_acpi snd_timer battery snd sdhci elan_i2c snd_soc_sst_acpi mmc_core fjes dw_dmac i2c_hid soundcore snd_soc_sst_match i2c_designware_platform video i2c_designware_core acpi_pad acpi_als kfifo_buf tpm_tis button industrialio tpm_tis_core tpm ext4 crc16 jbd2 fscrypto mbcache dm_mod joydev evdev hid_logitech_hidpp
> [ 1010.310449]  sd_mod hid_logitech_dj usbhid hid ahci libahci crc32c_intel libata xhci_pci xhci_hcd scsi_mod usbcore fan thermal
> [ 1010.310464] CPU: 3 PID: 119 Comm: kworker/3:2 Not tainted 4.9.0-rc8+ #14
> [ 1010.310466] Hardware name:                  /NUC5i7RYB, BIOS RYBDWi35.86A.0350.2015.0812.1722 08/12/2015
> [ 1010.310487] Workqueue: usb_hub_wq hub_event [usbcore]
> [ 1010.310490]  0000000000000000 ffffffff848f56c5 ffff8803b1f7f858 0000000000000000
> [ 1010.310496]  ffffffff8414f8f8 ffff88030000001f ffffed00763eff07 ffff8803b1f7f8f0
> [ 1010.310501]  ffff8803b3ea1e60 0000000000000001 ffffffffffffffef ffff8803b45c6840
> [ 1010.310505] Call Trace:
> [ 1010.310517]  [<ffffffff848f56c5>] ? dump_stack+0x5c/0x77
> [ 1010.310522]  [<ffffffff8414f8f8>] ? __warn+0x168/0x1a0
> [ 1010.310526]  [<ffffffff8414f9e4>] ? warn_slowpath_fmt+0xb4/0xf0
> [ 1010.310529]  [<ffffffff8414f930>] ? __warn+0x1a0/0x1a0
> [ 1010.310534]  [<ffffffff845436c6>] ? kasan_kmalloc+0xa6/0xd0
> [ 1010.310539]  [<ffffffff846ec2fa>] ? kernfs_path_from_node+0x4a/0x60
> [ 1010.310543]  [<ffffffff846f66eb>] ? sysfs_warn_dup+0x7b/0x90
> [ 1010.310547]  [<ffffffff846f6f26>] ? sysfs_do_create_link_sd.isra.2+0xb6/0xd0
> [ 1010.310553]  [<ffffffff84cd5a08>] ? bus_add_device+0x318/0x6b0
> [ 1010.310557]  [<ffffffff846f8693>] ? sysfs_create_groups+0x83/0x110
> [ 1010.310562]  [<ffffffff84ccff87>] ? device_add+0x777/0x1350
> [ 1010.310567]  [<ffffffff84ccf810>] ? device_private_init+0x180/0x180
> [ 1010.310583]  [<ffffffffc00c0f77>] ? usb_new_device+0x707/0x1030 [usbcore]
> [ 1010.310598]  [<ffffffffc00c58c5>] ? hub_event+0x1d65/0x3280 [usbcore]
> [ 1010.310604]  [<ffffffff841eb4ab>] ? account_entity_dequeue+0x30b/0x4a0
> [ 1010.310618]  [<ffffffffc00c3b60>] ? hub_port_debounce+0x280/0x280 [usbcore]
> [ 1010.310624]  [<ffffffff8407ccd0>] ? compat_start_thread+0x80/0x80
> [ 1010.310629]  [<ffffffff851f5cb4>] ? __schedule+0x704/0x1770
> [ 1010.310633]  [<ffffffff851f55b0>] ? io_schedule_timeout+0x390/0x390
> [ 1010.310638]  [<ffffffff84541783>] ? cache_reap+0x173/0x200
> [ 1010.310642]  [<ffffffff84197bed>] ? process_one_work+0x4ed/0xe60
> [ 1010.310646]  [<ffffffff84198642>] ? worker_thread+0xe2/0xfd0
> [ 1010.310650]  [<ffffffff8421f76c>] ? __wake_up_common+0xbc/0x160
> [ 1010.310654]  [<ffffffff84198560>] ? process_one_work+0xe60/0xe60
> [ 1010.310658]  [<ffffffff841a837c>] ? kthread+0x1cc/0x220
> [ 1010.310663]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
> [ 1010.310667]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
> [ 1010.310671]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
> [ 1010.310675]  [<ffffffff852016f5>] ? ret_from_fork+0x25/0x30
> [ 1010.310698] ---[ end trace 49b46eb633ff1197 ]---
> [ 1010.311298] usb 1-3.3: can't device_add, error -17
> [ 1010.390703] usb 1-3.3: new high-speed USB device number 9 using xhci_hcd
> [ 1010.496337] usb 1-3.3: New USB device found, idVendor=2040, idProduct=6513
> [ 1010.496343] usb 1-3.3: New USB device strings: Mfr=0, Product=1, SerialNumber=2
> [ 1010.496345] usb 1-3.3: Product: WinTV HVR-980
> [ 1010.496347] usb 1-3.3: SerialNumber: 4028449018
> [ 1010.497259] ------------[ cut here ]------------
> [ 1010.497264] WARNING: CPU: 3 PID: 119 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x7b/0x90
> [ 1010.497266] sysfs: cannot create duplicate filename '/bus/usb/devices/1-3.3'
> [ 1010.497267] Modules linked in: lgdt330x em28xx_dvb dvb_core em28xx_alsa tuner_xc2028 tuner tvp5150 em28xx_v4l videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core em28xx tveeprom v4l2_common videodev media xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp tun bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter ip_tables x_tables cmac bnep cpufreq_powersave cpufreq_conservative cpufreq_userspace binfmt_misc parport_pc ppdev lp parport snd_hda_codec_hdmi iTCO_wdt snd_hda_codec_realtek iTCO_vendor_support snd_hda_codec_generic arc4 intel_rapl x86_pkg_temp_thermal iwlmvm intel_powerclamp coretemp kvm_intel mac80211 kvm i915
> [ 1010.497307]  irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel iwlwifi pl2303 aesni_intel btusb aes_x86_64 usbserial lrw btrtl gf128mul glue_helper btbcm ablk_helper cryptd btintel bluetooth drm_kms_helper cfg80211 drm psmouse pcspkr i2c_i801 e1000e serio_raw snd_hda_intel snd_soc_rt5640 snd_hda_codec snd_soc_rl6231 snd_soc_ssm4567 mei_me i2c_smbus rfkill snd_hda_core ptp mei snd_soc_core ehci_pci sg lpc_ich shpchp mfd_core ehci_hcd pps_core snd_hwdep i2c_algo_bit snd_compress snd_pcm sdhci_acpi snd_timer battery snd sdhci elan_i2c snd_soc_sst_acpi mmc_core fjes dw_dmac i2c_hid soundcore snd_soc_sst_match i2c_designware_platform video i2c_designware_core acpi_pad acpi_als kfifo_buf tpm_tis button industrialio tpm_tis_core tpm ext4 crc16 jbd2 fscrypto mbcache dm_mod joydev evdev hid_logitech_hidpp
> [ 1010.497352]  sd_mod hid_logitech_dj usbhid hid ahci libahci crc32c_intel libata xhci_pci xhci_hcd scsi_mod usbcore fan thermal
> [ 1010.497362] CPU: 3 PID: 119 Comm: kworker/3:2 Tainted: G        W       4.9.0-rc8+ #14
> [ 1010.497363] Hardware name:                  /NUC5i7RYB, BIOS RYBDWi35.86A.0350.2015.0812.1722 08/12/2015
> [ 1010.497377] Workqueue: usb_hub_wq hub_event [usbcore]
> [ 1010.497379]  0000000000000000 ffffffff848f56c5 ffff8803b1f7f858 0000000000000000
> [ 1010.497382]  ffffffff8414f8f8 ffff88030000001f ffffed00763eff07 ffff8803b1f7f8f0
> [ 1010.497385]  ffff8803b3ea1e60 0000000000000001 ffffffffffffffef ffff8803b45c6840
> [ 1010.497387] Call Trace:
> [ 1010.497395]  [<ffffffff848f56c5>] ? dump_stack+0x5c/0x77
> [ 1010.497398]  [<ffffffff8414f8f8>] ? __warn+0x168/0x1a0
> [ 1010.497400]  [<ffffffff8414f9e4>] ? warn_slowpath_fmt+0xb4/0xf0
> [ 1010.497402]  [<ffffffff8414f930>] ? __warn+0x1a0/0x1a0
> [ 1010.497405]  [<ffffffff845436c6>] ? kasan_kmalloc+0xa6/0xd0
> [ 1010.497408]  [<ffffffff846ec2fa>] ? kernfs_path_from_node+0x4a/0x60
> [ 1010.497410]  [<ffffffff846f66eb>] ? sysfs_warn_dup+0x7b/0x90
> [ 1010.497412]  [<ffffffff846f6f26>] ? sysfs_do_create_link_sd.isra.2+0xb6/0xd0
> [ 1010.497416]  [<ffffffff84cd5a08>] ? bus_add_device+0x318/0x6b0
> [ 1010.497419]  [<ffffffff846f8693>] ? sysfs_create_groups+0x83/0x110
> [ 1010.497421]  [<ffffffff84ccff87>] ? device_add+0x777/0x1350
> [ 1010.497424]  [<ffffffff84ccf810>] ? device_private_init+0x180/0x180
> [ 1010.497433]  [<ffffffffc00c0f77>] ? usb_new_device+0x707/0x1030 [usbcore]
> [ 1010.497441]  [<ffffffffc00c58c5>] ? hub_event+0x1d65/0x3280 [usbcore]
> [ 1010.497445]  [<ffffffff841eb4ab>] ? account_entity_dequeue+0x30b/0x4a0
> [ 1010.497454]  [<ffffffffc00c3b60>] ? hub_port_debounce+0x280/0x280 [usbcore]
> [ 1010.497457]  [<ffffffff8407ccd0>] ? compat_start_thread+0x80/0x80
> [ 1010.497460]  [<ffffffff851f5cb4>] ? __schedule+0x704/0x1770
> [ 1010.497462]  [<ffffffff851f55b0>] ? io_schedule_timeout+0x390/0x390
> [ 1010.497465]  [<ffffffff84541783>] ? cache_reap+0x173/0x200
> [ 1010.497468]  [<ffffffff84197bed>] ? process_one_work+0x4ed/0xe60
> [ 1010.497470]  [<ffffffff84198642>] ? worker_thread+0xe2/0xfd0
> [ 1010.497473]  [<ffffffff8421f76c>] ? __wake_up_common+0xbc/0x160
> [ 1010.497475]  [<ffffffff84198560>] ? process_one_work+0xe60/0xe60
> [ 1010.497477]  [<ffffffff841a837c>] ? kthread+0x1cc/0x220
> [ 1010.497480]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
> [ 1010.497482]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
> [ 1010.497485]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
> [ 1010.497487]  [<ffffffff852016f5>] ? ret_from_fork+0x25/0x30
> [ 1010.497489] ---[ end trace 49b46eb633ff1198 ]---
> [ 1010.497829] usb 1-3.3: can't device_add, error -17
> [ 1010.578707] usb 1-3.3: new high-speed USB device number 10 using xhci_hcd
> [ 1010.604448] usb 1-3.3: New USB device found, idVendor=2040, idProduct=6513
> [ 1010.604452] usb 1-3.3: New USB device strings: Mfr=0, Product=1, SerialNumber=2
> [ 1010.604454] usb 1-3.3: Product: WinTV HVR-980
> [ 1010.604456] usb 1-3.3: SerialNumber: 4028449018
> [ 1010.605369] ------------[ cut here ]------------
> [ 1010.605374] WARNING: CPU: 3 PID: 119 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x7b/0x90
> [ 1010.605375] sysfs: cannot create duplicate filename '/bus/usb/devices/1-3.3'
> [ 1010.605376] Modules linked in: lgdt330x em28xx_dvb dvb_core em28xx_alsa tuner_xc2028 tuner tvp5150 em28xx_v4l videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core em28xx tveeprom v4l2_common videodev media xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp tun bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter ip_tables x_tables cmac bnep cpufreq_powersave cpufreq_conservative cpufreq_userspace binfmt_misc parport_pc ppdev lp parport snd_hda_codec_hdmi iTCO_wdt snd_hda_codec_realtek iTCO_vendor_support snd_hda_codec_generic arc4 intel_rapl x86_pkg_temp_thermal iwlmvm intel_powerclamp coretemp kvm_intel mac80211 kvm i915
> [ 1010.605415]  irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel iwlwifi pl2303 aesni_intel btusb aes_x86_64 usbserial lrw btrtl gf128mul glue_helper btbcm ablk_helper cryptd btintel bluetooth drm_kms_helper cfg80211 drm psmouse pcspkr i2c_i801 e1000e serio_raw snd_hda_intel snd_soc_rt5640 snd_hda_codec snd_soc_rl6231 snd_soc_ssm4567 mei_me i2c_smbus rfkill snd_hda_core ptp mei snd_soc_core ehci_pci sg lpc_ich shpchp mfd_core ehci_hcd pps_core snd_hwdep i2c_algo_bit snd_compress snd_pcm sdhci_acpi snd_timer battery snd sdhci elan_i2c snd_soc_sst_acpi mmc_core fjes dw_dmac i2c_hid soundcore snd_soc_sst_match i2c_designware_platform video i2c_designware_core acpi_pad acpi_als kfifo_buf tpm_tis button industrialio tpm_tis_core tpm ext4 crc16 jbd2 fscrypto mbcache dm_mod joydev evdev hid_logitech_hidpp
> [ 1010.605459]  sd_mod hid_logitech_dj usbhid hid ahci libahci crc32c_intel libata xhci_pci xhci_hcd scsi_mod usbcore fan thermal
> [ 1010.605469] CPU: 3 PID: 119 Comm: kworker/3:2 Tainted: G        W       4.9.0-rc8+ #14
> [ 1010.605471] Hardware name:                  /NUC5i7RYB, BIOS RYBDWi35.86A.0350.2015.0812.1722 08/12/2015
> [ 1010.605484] Workqueue: usb_hub_wq hub_event [usbcore]
> [ 1010.605486]  0000000000000000 ffffffff848f56c5 ffff8803b1f7f858 0000000000000000
> [ 1010.605490]  ffffffff8414f8f8 ffff88030000001f ffffed00763eff07 ffff8803b1f7f8f0
> [ 1010.605492]  ffff8803b3ea1e60 0000000000000001 ffffffffffffffef ffff8803b45c6840
> [ 1010.605495] Call Trace:
> [ 1010.605502]  [<ffffffff848f56c5>] ? dump_stack+0x5c/0x77
> [ 1010.605505]  [<ffffffff8414f8f8>] ? __warn+0x168/0x1a0
> [ 1010.605508]  [<ffffffff8414f9e4>] ? warn_slowpath_fmt+0xb4/0xf0
> [ 1010.605510]  [<ffffffff8414f930>] ? __warn+0x1a0/0x1a0
> [ 1010.605513]  [<ffffffff845436c6>] ? kasan_kmalloc+0xa6/0xd0
> [ 1010.605516]  [<ffffffff846ec2fa>] ? kernfs_path_from_node+0x4a/0x60
> [ 1010.605518]  [<ffffffff846f66eb>] ? sysfs_warn_dup+0x7b/0x90
> [ 1010.605520]  [<ffffffff846f6f26>] ? sysfs_do_create_link_sd.isra.2+0xb6/0xd0
> [ 1010.605524]  [<ffffffff84cd5a08>] ? bus_add_device+0x318/0x6b0
> [ 1010.605527]  [<ffffffff846f8693>] ? sysfs_create_groups+0x83/0x110
> [ 1010.605529]  [<ffffffff84ccff87>] ? device_add+0x777/0x1350
> [ 1010.605532]  [<ffffffff84ccf810>] ? device_private_init+0x180/0x180
> [ 1010.605542]  [<ffffffffc00c0f77>] ? usb_new_device+0x707/0x1030 [usbcore]
> [ 1010.605550]  [<ffffffffc00c58c5>] ? hub_event+0x1d65/0x3280 [usbcore]
> [ 1010.605554]  [<ffffffff841eb4ab>] ? account_entity_dequeue+0x30b/0x4a0
> [ 1010.605563]  [<ffffffffc00c3b60>] ? hub_port_debounce+0x280/0x280 [usbcore]
> [ 1010.605566]  [<ffffffff8407ccd0>] ? compat_start_thread+0x80/0x80
> [ 1010.605569]  [<ffffffff851f5cb4>] ? __schedule+0x704/0x1770
> [ 1010.605572]  [<ffffffff851f55b0>] ? io_schedule_timeout+0x390/0x390
> [ 1010.605574]  [<ffffffff84541783>] ? cache_reap+0x173/0x200
> [ 1010.605577]  [<ffffffff84197bed>] ? process_one_work+0x4ed/0xe60
> [ 1010.605579]  [<ffffffff84198642>] ? worker_thread+0xe2/0xfd0
> [ 1010.605581]  [<ffffffff8421f76c>] ? __wake_up_common+0xbc/0x160
> [ 1010.605584]  [<ffffffff84198560>] ? process_one_work+0xe60/0xe60
> [ 1010.605586]  [<ffffffff841a837c>] ? kthread+0x1cc/0x220
> [ 1010.605589]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
> [ 1010.605591]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
> [ 1010.605594]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
> [ 1010.605596]  [<ffffffff852016f5>] ? ret_from_fork+0x25/0x30
> [ 1010.605598] ---[ end trace 49b46eb633ff1199 ]---
> [ 1010.605948] usb 1-3.3: can't device_add, error -17
> [ 1010.686729] usb 1-3.3: new high-speed USB device number 11 using xhci_hcd
> [ 1010.712761] usb 1-3.3: New USB device found, idVendor=2040, idProduct=6513
> [ 1010.712768] usb 1-3.3: New USB device strings: Mfr=0, Product=1, SerialNumber=2
> [ 1010.712772] usb 1-3.3: Product: WinTV HVR-980
> [ 1010.712775] usb 1-3.3: SerialNumber: 4028449018
> [ 1010.714339] ------------[ cut here ]------------
> [ 1010.714347] WARNING: CPU: 3 PID: 119 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x7b/0x90
> [ 1010.714349] sysfs: cannot create duplicate filename '/bus/usb/devices/1-3.3'
> [ 1010.714351] Modules linked in: lgdt330x em28xx_dvb dvb_core em28xx_alsa tuner_xc2028 tuner tvp5150 em28xx_v4l videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core em28xx tveeprom v4l2_common videodev media xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp tun bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter ip_tables x_tables cmac bnep cpufreq_powersave cpufreq_conservative cpufreq_userspace binfmt_misc parport_pc ppdev lp parport snd_hda_codec_hdmi iTCO_wdt snd_hda_codec_realtek iTCO_vendor_support snd_hda_codec_generic arc4 intel_rapl x86_pkg_temp_thermal iwlmvm intel_powerclamp coretemp kvm_intel mac80211 kvm i915
> [ 1010.714409]  irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel iwlwifi pl2303 aesni_intel btusb aes_x86_64 usbserial lrw btrtl gf128mul glue_helper btbcm ablk_helper cryptd btintel bluetooth drm_kms_helper cfg80211 drm psmouse pcspkr i2c_i801 e1000e serio_raw snd_hda_intel snd_soc_rt5640 snd_hda_codec snd_soc_rl6231 snd_soc_ssm4567 mei_me i2c_smbus rfkill snd_hda_core ptp mei snd_soc_core ehci_pci sg lpc_ich shpchp mfd_core ehci_hcd pps_core snd_hwdep i2c_algo_bit snd_compress snd_pcm sdhci_acpi snd_timer battery snd sdhci elan_i2c snd_soc_sst_acpi mmc_core fjes dw_dmac i2c_hid soundcore snd_soc_sst_match i2c_designware_platform video i2c_designware_core acpi_pad acpi_als kfifo_buf tpm_tis button industrialio tpm_tis_core tpm ext4 crc16 jbd2 fscrypto mbcache dm_mod joydev evdev hid_logitech_hidpp
> [ 1010.714475]  sd_mod hid_logitech_dj usbhid hid ahci libahci crc32c_intel libata xhci_pci xhci_hcd scsi_mod usbcore fan thermal
> [ 1010.714490] CPU: 3 PID: 119 Comm: kworker/3:2 Tainted: G        W       4.9.0-rc8+ #14
> [ 1010.714493] Hardware name:                  /NUC5i7RYB, BIOS RYBDWi35.86A.0350.2015.0812.1722 08/12/2015
> [ 1010.714513] Workqueue: usb_hub_wq hub_event [usbcore]
> [ 1010.714517]  0000000000000000 ffffffff848f56c5 ffff8803b1f7f858 0000000000000000
> [ 1010.714522]  ffffffff8414f8f8 ffff88030000001f ffffed00763eff07 ffff8803b1f7f8f0
> [ 1010.714527]  ffff8803b3ea1e60 0000000000000001 ffffffffffffffef ffff8803b45c6840
> [ 1010.714532] Call Trace:
> [ 1010.714543]  [<ffffffff848f56c5>] ? dump_stack+0x5c/0x77
> [ 1010.714547]  [<ffffffff8414f8f8>] ? __warn+0x168/0x1a0
> [ 1010.714551]  [<ffffffff8414f9e4>] ? warn_slowpath_fmt+0xb4/0xf0
> [ 1010.714555]  [<ffffffff8414f930>] ? __warn+0x1a0/0x1a0
> [ 1010.714560]  [<ffffffff845436c6>] ? kasan_kmalloc+0xa6/0xd0
> [ 1010.714565]  [<ffffffff846ec2fa>] ? kernfs_path_from_node+0x4a/0x60
> [ 1010.714568]  [<ffffffff846f66eb>] ? sysfs_warn_dup+0x7b/0x90
> [ 1010.714573]  [<ffffffff846f6f26>] ? sysfs_do_create_link_sd.isra.2+0xb6/0xd0
> [ 1010.714579]  [<ffffffff84cd5a08>] ? bus_add_device+0x318/0x6b0
> [ 1010.714583]  [<ffffffff846f8693>] ? sysfs_create_groups+0x83/0x110
> [ 1010.714587]  [<ffffffff84ccff87>] ? device_add+0x777/0x1350
> [ 1010.714592]  [<ffffffff84ccf810>] ? device_private_init+0x180/0x180
> [ 1010.714608]  [<ffffffffc00c0f77>] ? usb_new_device+0x707/0x1030 [usbcore]
> [ 1010.714623]  [<ffffffffc00c58c5>] ? hub_event+0x1d65/0x3280 [usbcore]
> [ 1010.714628]  [<ffffffff841eb4ab>] ? account_entity_dequeue+0x30b/0x4a0
> [ 1010.714643]  [<ffffffffc00c3b60>] ? hub_port_debounce+0x280/0x280 [usbcore]
> [ 1010.714648]  [<ffffffff8407ccd0>] ? compat_start_thread+0x80/0x80
> [ 1010.714653]  [<ffffffff851f5cb4>] ? __schedule+0x704/0x1770
> [ 1010.714657]  [<ffffffff851f55b0>] ? io_schedule_timeout+0x390/0x390
> [ 1010.714661]  [<ffffffff84541783>] ? cache_reap+0x173/0x200
> [ 1010.714666]  [<ffffffff84197bed>] ? process_one_work+0x4ed/0xe60
> [ 1010.714670]  [<ffffffff84198642>] ? worker_thread+0xe2/0xfd0
> [ 1010.714674]  [<ffffffff8421f76c>] ? __wake_up_common+0xbc/0x160
> [ 1010.714678]  [<ffffffff84198560>] ? process_one_work+0xe60/0xe60
> [ 1010.714682]  [<ffffffff841a837c>] ? kthread+0x1cc/0x220
> [ 1010.714686]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
> [ 1010.714691]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
> [ 1010.714695]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
> [ 1010.714699]  [<ffffffff852016f5>] ? ret_from_fork+0x25/0x30
> [ 1010.714719] ---[ end trace 49b46eb633ff119a ]---
> [ 1010.715706] usb 1-3.3: can't device_add, error -17
> [ 1010.716223] usb 1-3-port3: unable to enumerate USB device
> 
> 
> 
> If so, it seems that the device was not properly unregistered. That's
> weird, since everything sounded ok at device unregister:
> 
> [  999.740335] usb 1-3.3: em2882!3#0: USB disconnect, device number 7
> [  999.742857] usb 1-3.3: em2882!3#0: Disconnecting
> [  999.742874] usb 1-3.3: em2882!3#0: Closing video extension
> [  999.743058] usb 1-3.3: em2882!3#0: V4L2 device vbi0 deregistered
> [  999.744327] usb 1-3.3: em2882!3#0: V4L2 device video0 deregistered
> [  999.747938] tvp5150 6-005c: tvp5150.c: removing tvp5150 adapter on address 0xb8
> [  999.750085] xc2028 6-0061: xc2028_dvb_release called
> [  999.750852] usb 1-3.3: em2882!3#0: Closing audio extension
> [  999.754253] usb 1-3.3: em2882!3#0: Closing DVB extension
> [  999.760360] xc2028 6-0061: xc2028_dvb_release called
> [  999.760362] xc2028 6-0061: free_firmware called
> [  999.760958] xc2028 6-0061: destroying instance
> 
> I'll try to bisect this.

According with git bisect, the culprit is this patch:

ce8591ff023ef8e04750c2cc2882523619a80b58 is the first bad commit
commit ce8591ff023ef8e04750c2cc2882523619a80b58
Author: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Date:   Thu Oct 20 08:42:03 2016 -0200

    [media] em28xx: convert it from pr_foo() to dev_foo()
    
    Instead of using pr_foo(), use dev_foo(), with provides a
    better output. As this device is a multi-interface one,
    we'll set the device name to show the chipset and the driver
    used.
    
    While here, get rid of printk continuation messages.
    
    Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

:040000 040000 834f13194c879d17f2b2ca79afbd1ed0999fbfeb 85ea8360d7adbf597ca1d6c5a8205b1a64666879 M	drivers

I'll do more tests and see what's wrong there.

Thanks,
Mauro

^ permalink raw reply	[flat|nested] 6+ messages in thread

* Re: em28xx broken 4.9.0-rc6+
  2016-12-07 14:22   ` Mauro Carvalho Chehab
@ 2016-12-07 14:55     ` Mauro Carvalho Chehab
  2016-12-07 15:04       ` Antti Palosaari
  0 siblings, 1 reply; 6+ messages in thread
From: Mauro Carvalho Chehab @ 2016-12-07 14:55 UTC (permalink / raw)
  To: Antti Palosaari; +Cc: LMML

Em Wed, 7 Dec 2016 12:22:01 -0200
Mauro Carvalho Chehab <mchehab@s-opensource.com> escreveu:

> Em Tue, 6 Dec 2016 13:41:38 -0200
> Mauro Carvalho Chehab <mchehab@s-opensource.com> escreveu:
> 
> > Em Tue, 6 Dec 2016 01:06:17 +0200
> > Antti Palosaari <crope@iki.fi> escreveu:
> >   
> > > Hello Mauro
> > > I just noticed current em28xx driver seem to be broken. When I plug 
> > > device first time it loads correctly, but when I re-plug it, it does not 
> > > work anymore but yells a lot of noise to message log. Tested with PCTV 
> > > 290e and 292e both same. Other USB DVB devices are working so it is very 
> > > likely em28xx driver bug.
> > > 
> > > Easy to reproduce:
> > > plug device
> > > unplug device
> > > plug device  
> > 
> > 
> > Are you referring to those:
> > 
> > [ 1010.310320] WARNING: CPU: 3 PID: 119 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x7b/0x90
> > [ 1010.310323] sysfs: cannot create duplicate filename '/bus/usb/devices/1-3.3'
> > [ 1010.310325] Modules linked in: lgdt330x em28xx_dvb dvb_core em28xx_alsa tuner_xc2028 tuner tvp5150 em28xx_v4l videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core em28xx tveeprom v4l2_common videodev media xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp tun bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter ip_tables x_tables cmac bnep cpufreq_powersave cpufreq_conservative cpufreq_userspace binfmt_misc parport_pc ppdev lp parport snd_hda_codec_hdmi iTCO_wdt snd_hda_codec_realtek iTCO_vendor_support snd_hda_codec_generic arc4 intel_rapl x86_pkg_temp_thermal iwlmvm intel_powerclamp coretemp kvm_intel mac80211 kvm i915
> > [ 1010.310383]  irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel iwlwifi pl2303 aesni_intel btusb aes_x86_64 usbserial lrw btrtl gf128mul glue_helper btbcm ablk_helper cryptd btintel bluetooth drm_kms_helper cfg80211 drm psmouse pcspkr i2c_i801 e1000e serio_raw snd_hda_intel snd_soc_rt5640 snd_hda_codec snd_soc_rl6231 snd_soc_ssm4567 mei_me i2c_smbus rfkill snd_hda_core ptp mei snd_soc_core ehci_pci sg lpc_ich shpchp mfd_core ehci_hcd pps_core snd_hwdep i2c_algo_bit snd_compress snd_pcm sdhci_acpi snd_timer battery snd sdhci elan_i2c snd_soc_sst_acpi mmc_core fjes dw_dmac i2c_hid soundcore snd_soc_sst_match i2c_designware_platform video i2c_designware_core acpi_pad acpi_als kfifo_buf tpm_tis button industrialio tpm_tis_core tpm ext4 crc16 jbd2 fscrypto mbcache dm_mod joydev evdev hid_logitech_hidpp
> > [ 1010.310449]  sd_mod hid_logitech_dj usbhid hid ahci libahci crc32c_intel libata xhci_pci xhci_hcd scsi_mod usbcore fan thermal
> > [ 1010.310464] CPU: 3 PID: 119 Comm: kworker/3:2 Not tainted 4.9.0-rc8+ #14
> > [ 1010.310466] Hardware name:                  /NUC5i7RYB, BIOS RYBDWi35.86A.0350.2015.0812.1722 08/12/2015
> > [ 1010.310487] Workqueue: usb_hub_wq hub_event [usbcore]
> > [ 1010.310490]  0000000000000000 ffffffff848f56c5 ffff8803b1f7f858 0000000000000000
> > [ 1010.310496]  ffffffff8414f8f8 ffff88030000001f ffffed00763eff07 ffff8803b1f7f8f0
> > [ 1010.310501]  ffff8803b3ea1e60 0000000000000001 ffffffffffffffef ffff8803b45c6840
> > [ 1010.310505] Call Trace:
> > [ 1010.310517]  [<ffffffff848f56c5>] ? dump_stack+0x5c/0x77
> > [ 1010.310522]  [<ffffffff8414f8f8>] ? __warn+0x168/0x1a0
> > [ 1010.310526]  [<ffffffff8414f9e4>] ? warn_slowpath_fmt+0xb4/0xf0
> > [ 1010.310529]  [<ffffffff8414f930>] ? __warn+0x1a0/0x1a0
> > [ 1010.310534]  [<ffffffff845436c6>] ? kasan_kmalloc+0xa6/0xd0
> > [ 1010.310539]  [<ffffffff846ec2fa>] ? kernfs_path_from_node+0x4a/0x60
> > [ 1010.310543]  [<ffffffff846f66eb>] ? sysfs_warn_dup+0x7b/0x90
> > [ 1010.310547]  [<ffffffff846f6f26>] ? sysfs_do_create_link_sd.isra.2+0xb6/0xd0
> > [ 1010.310553]  [<ffffffff84cd5a08>] ? bus_add_device+0x318/0x6b0
> > [ 1010.310557]  [<ffffffff846f8693>] ? sysfs_create_groups+0x83/0x110
> > [ 1010.310562]  [<ffffffff84ccff87>] ? device_add+0x777/0x1350
> > [ 1010.310567]  [<ffffffff84ccf810>] ? device_private_init+0x180/0x180
> > [ 1010.310583]  [<ffffffffc00c0f77>] ? usb_new_device+0x707/0x1030 [usbcore]
> > [ 1010.310598]  [<ffffffffc00c58c5>] ? hub_event+0x1d65/0x3280 [usbcore]
> > [ 1010.310604]  [<ffffffff841eb4ab>] ? account_entity_dequeue+0x30b/0x4a0
> > [ 1010.310618]  [<ffffffffc00c3b60>] ? hub_port_debounce+0x280/0x280 [usbcore]
> > [ 1010.310624]  [<ffffffff8407ccd0>] ? compat_start_thread+0x80/0x80
> > [ 1010.310629]  [<ffffffff851f5cb4>] ? __schedule+0x704/0x1770
> > [ 1010.310633]  [<ffffffff851f55b0>] ? io_schedule_timeout+0x390/0x390
> > [ 1010.310638]  [<ffffffff84541783>] ? cache_reap+0x173/0x200
> > [ 1010.310642]  [<ffffffff84197bed>] ? process_one_work+0x4ed/0xe60
> > [ 1010.310646]  [<ffffffff84198642>] ? worker_thread+0xe2/0xfd0
> > [ 1010.310650]  [<ffffffff8421f76c>] ? __wake_up_common+0xbc/0x160
> > [ 1010.310654]  [<ffffffff84198560>] ? process_one_work+0xe60/0xe60
> > [ 1010.310658]  [<ffffffff841a837c>] ? kthread+0x1cc/0x220
> > [ 1010.310663]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
> > [ 1010.310667]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
> > [ 1010.310671]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
> > [ 1010.310675]  [<ffffffff852016f5>] ? ret_from_fork+0x25/0x30
> > [ 1010.310698] ---[ end trace 49b46eb633ff1197 ]---
> > [ 1010.311298] usb 1-3.3: can't device_add, error -17
> > [ 1010.390703] usb 1-3.3: new high-speed USB device number 9 using xhci_hcd
> > [ 1010.496337] usb 1-3.3: New USB device found, idVendor=2040, idProduct=6513
> > [ 1010.496343] usb 1-3.3: New USB device strings: Mfr=0, Product=1, SerialNumber=2
> > [ 1010.496345] usb 1-3.3: Product: WinTV HVR-980
> > [ 1010.496347] usb 1-3.3: SerialNumber: 4028449018
> > [ 1010.497259] ------------[ cut here ]------------
> > [ 1010.497264] WARNING: CPU: 3 PID: 119 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x7b/0x90
> > [ 1010.497266] sysfs: cannot create duplicate filename '/bus/usb/devices/1-3.3'
> > [ 1010.497267] Modules linked in: lgdt330x em28xx_dvb dvb_core em28xx_alsa tuner_xc2028 tuner tvp5150 em28xx_v4l videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core em28xx tveeprom v4l2_common videodev media xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp tun bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter ip_tables x_tables cmac bnep cpufreq_powersave cpufreq_conservative cpufreq_userspace binfmt_misc parport_pc ppdev lp parport snd_hda_codec_hdmi iTCO_wdt snd_hda_codec_realtek iTCO_vendor_support snd_hda_codec_generic arc4 intel_rapl x86_pkg_temp_thermal iwlmvm intel_powerclamp coretemp kvm_intel mac80211 kvm i915
> > [ 1010.497307]  irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel iwlwifi pl2303 aesni_intel btusb aes_x86_64 usbserial lrw btrtl gf128mul glue_helper btbcm ablk_helper cryptd btintel bluetooth drm_kms_helper cfg80211 drm psmouse pcspkr i2c_i801 e1000e serio_raw snd_hda_intel snd_soc_rt5640 snd_hda_codec snd_soc_rl6231 snd_soc_ssm4567 mei_me i2c_smbus rfkill snd_hda_core ptp mei snd_soc_core ehci_pci sg lpc_ich shpchp mfd_core ehci_hcd pps_core snd_hwdep i2c_algo_bit snd_compress snd_pcm sdhci_acpi snd_timer battery snd sdhci elan_i2c snd_soc_sst_acpi mmc_core fjes dw_dmac i2c_hid soundcore snd_soc_sst_match i2c_designware_platform video i2c_designware_core acpi_pad acpi_als kfifo_buf tpm_tis button industrialio tpm_tis_core tpm ext4 crc16 jbd2 fscrypto mbcache dm_mod joydev evdev hid_logitech_hidpp
> > [ 1010.497352]  sd_mod hid_logitech_dj usbhid hid ahci libahci crc32c_intel libata xhci_pci xhci_hcd scsi_mod usbcore fan thermal
> > [ 1010.497362] CPU: 3 PID: 119 Comm: kworker/3:2 Tainted: G        W       4.9.0-rc8+ #14
> > [ 1010.497363] Hardware name:                  /NUC5i7RYB, BIOS RYBDWi35.86A.0350.2015.0812.1722 08/12/2015
> > [ 1010.497377] Workqueue: usb_hub_wq hub_event [usbcore]
> > [ 1010.497379]  0000000000000000 ffffffff848f56c5 ffff8803b1f7f858 0000000000000000
> > [ 1010.497382]  ffffffff8414f8f8 ffff88030000001f ffffed00763eff07 ffff8803b1f7f8f0
> > [ 1010.497385]  ffff8803b3ea1e60 0000000000000001 ffffffffffffffef ffff8803b45c6840
> > [ 1010.497387] Call Trace:
> > [ 1010.497395]  [<ffffffff848f56c5>] ? dump_stack+0x5c/0x77
> > [ 1010.497398]  [<ffffffff8414f8f8>] ? __warn+0x168/0x1a0
> > [ 1010.497400]  [<ffffffff8414f9e4>] ? warn_slowpath_fmt+0xb4/0xf0
> > [ 1010.497402]  [<ffffffff8414f930>] ? __warn+0x1a0/0x1a0
> > [ 1010.497405]  [<ffffffff845436c6>] ? kasan_kmalloc+0xa6/0xd0
> > [ 1010.497408]  [<ffffffff846ec2fa>] ? kernfs_path_from_node+0x4a/0x60
> > [ 1010.497410]  [<ffffffff846f66eb>] ? sysfs_warn_dup+0x7b/0x90
> > [ 1010.497412]  [<ffffffff846f6f26>] ? sysfs_do_create_link_sd.isra.2+0xb6/0xd0
> > [ 1010.497416]  [<ffffffff84cd5a08>] ? bus_add_device+0x318/0x6b0
> > [ 1010.497419]  [<ffffffff846f8693>] ? sysfs_create_groups+0x83/0x110
> > [ 1010.497421]  [<ffffffff84ccff87>] ? device_add+0x777/0x1350
> > [ 1010.497424]  [<ffffffff84ccf810>] ? device_private_init+0x180/0x180
> > [ 1010.497433]  [<ffffffffc00c0f77>] ? usb_new_device+0x707/0x1030 [usbcore]
> > [ 1010.497441]  [<ffffffffc00c58c5>] ? hub_event+0x1d65/0x3280 [usbcore]
> > [ 1010.497445]  [<ffffffff841eb4ab>] ? account_entity_dequeue+0x30b/0x4a0
> > [ 1010.497454]  [<ffffffffc00c3b60>] ? hub_port_debounce+0x280/0x280 [usbcore]
> > [ 1010.497457]  [<ffffffff8407ccd0>] ? compat_start_thread+0x80/0x80
> > [ 1010.497460]  [<ffffffff851f5cb4>] ? __schedule+0x704/0x1770
> > [ 1010.497462]  [<ffffffff851f55b0>] ? io_schedule_timeout+0x390/0x390
> > [ 1010.497465]  [<ffffffff84541783>] ? cache_reap+0x173/0x200
> > [ 1010.497468]  [<ffffffff84197bed>] ? process_one_work+0x4ed/0xe60
> > [ 1010.497470]  [<ffffffff84198642>] ? worker_thread+0xe2/0xfd0
> > [ 1010.497473]  [<ffffffff8421f76c>] ? __wake_up_common+0xbc/0x160
> > [ 1010.497475]  [<ffffffff84198560>] ? process_one_work+0xe60/0xe60
> > [ 1010.497477]  [<ffffffff841a837c>] ? kthread+0x1cc/0x220
> > [ 1010.497480]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
> > [ 1010.497482]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
> > [ 1010.497485]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
> > [ 1010.497487]  [<ffffffff852016f5>] ? ret_from_fork+0x25/0x30
> > [ 1010.497489] ---[ end trace 49b46eb633ff1198 ]---
> > [ 1010.497829] usb 1-3.3: can't device_add, error -17
> > [ 1010.578707] usb 1-3.3: new high-speed USB device number 10 using xhci_hcd
> > [ 1010.604448] usb 1-3.3: New USB device found, idVendor=2040, idProduct=6513
> > [ 1010.604452] usb 1-3.3: New USB device strings: Mfr=0, Product=1, SerialNumber=2
> > [ 1010.604454] usb 1-3.3: Product: WinTV HVR-980
> > [ 1010.604456] usb 1-3.3: SerialNumber: 4028449018
> > [ 1010.605369] ------------[ cut here ]------------
> > [ 1010.605374] WARNING: CPU: 3 PID: 119 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x7b/0x90
> > [ 1010.605375] sysfs: cannot create duplicate filename '/bus/usb/devices/1-3.3'
> > [ 1010.605376] Modules linked in: lgdt330x em28xx_dvb dvb_core em28xx_alsa tuner_xc2028 tuner tvp5150 em28xx_v4l videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core em28xx tveeprom v4l2_common videodev media xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp tun bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter ip_tables x_tables cmac bnep cpufreq_powersave cpufreq_conservative cpufreq_userspace binfmt_misc parport_pc ppdev lp parport snd_hda_codec_hdmi iTCO_wdt snd_hda_codec_realtek iTCO_vendor_support snd_hda_codec_generic arc4 intel_rapl x86_pkg_temp_thermal iwlmvm intel_powerclamp coretemp kvm_intel mac80211 kvm i915
> > [ 1010.605415]  irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel iwlwifi pl2303 aesni_intel btusb aes_x86_64 usbserial lrw btrtl gf128mul glue_helper btbcm ablk_helper cryptd btintel bluetooth drm_kms_helper cfg80211 drm psmouse pcspkr i2c_i801 e1000e serio_raw snd_hda_intel snd_soc_rt5640 snd_hda_codec snd_soc_rl6231 snd_soc_ssm4567 mei_me i2c_smbus rfkill snd_hda_core ptp mei snd_soc_core ehci_pci sg lpc_ich shpchp mfd_core ehci_hcd pps_core snd_hwdep i2c_algo_bit snd_compress snd_pcm sdhci_acpi snd_timer battery snd sdhci elan_i2c snd_soc_sst_acpi mmc_core fjes dw_dmac i2c_hid soundcore snd_soc_sst_match i2c_designware_platform video i2c_designware_core acpi_pad acpi_als kfifo_buf tpm_tis button industrialio tpm_tis_core tpm ext4 crc16 jbd2 fscrypto mbcache dm_mod joydev evdev hid_logitech_hidpp
> > [ 1010.605459]  sd_mod hid_logitech_dj usbhid hid ahci libahci crc32c_intel libata xhci_pci xhci_hcd scsi_mod usbcore fan thermal
> > [ 1010.605469] CPU: 3 PID: 119 Comm: kworker/3:2 Tainted: G        W       4.9.0-rc8+ #14
> > [ 1010.605471] Hardware name:                  /NUC5i7RYB, BIOS RYBDWi35.86A.0350.2015.0812.1722 08/12/2015
> > [ 1010.605484] Workqueue: usb_hub_wq hub_event [usbcore]
> > [ 1010.605486]  0000000000000000 ffffffff848f56c5 ffff8803b1f7f858 0000000000000000
> > [ 1010.605490]  ffffffff8414f8f8 ffff88030000001f ffffed00763eff07 ffff8803b1f7f8f0
> > [ 1010.605492]  ffff8803b3ea1e60 0000000000000001 ffffffffffffffef ffff8803b45c6840
> > [ 1010.605495] Call Trace:
> > [ 1010.605502]  [<ffffffff848f56c5>] ? dump_stack+0x5c/0x77
> > [ 1010.605505]  [<ffffffff8414f8f8>] ? __warn+0x168/0x1a0
> > [ 1010.605508]  [<ffffffff8414f9e4>] ? warn_slowpath_fmt+0xb4/0xf0
> > [ 1010.605510]  [<ffffffff8414f930>] ? __warn+0x1a0/0x1a0
> > [ 1010.605513]  [<ffffffff845436c6>] ? kasan_kmalloc+0xa6/0xd0
> > [ 1010.605516]  [<ffffffff846ec2fa>] ? kernfs_path_from_node+0x4a/0x60
> > [ 1010.605518]  [<ffffffff846f66eb>] ? sysfs_warn_dup+0x7b/0x90
> > [ 1010.605520]  [<ffffffff846f6f26>] ? sysfs_do_create_link_sd.isra.2+0xb6/0xd0
> > [ 1010.605524]  [<ffffffff84cd5a08>] ? bus_add_device+0x318/0x6b0
> > [ 1010.605527]  [<ffffffff846f8693>] ? sysfs_create_groups+0x83/0x110
> > [ 1010.605529]  [<ffffffff84ccff87>] ? device_add+0x777/0x1350
> > [ 1010.605532]  [<ffffffff84ccf810>] ? device_private_init+0x180/0x180
> > [ 1010.605542]  [<ffffffffc00c0f77>] ? usb_new_device+0x707/0x1030 [usbcore]
> > [ 1010.605550]  [<ffffffffc00c58c5>] ? hub_event+0x1d65/0x3280 [usbcore]
> > [ 1010.605554]  [<ffffffff841eb4ab>] ? account_entity_dequeue+0x30b/0x4a0
> > [ 1010.605563]  [<ffffffffc00c3b60>] ? hub_port_debounce+0x280/0x280 [usbcore]
> > [ 1010.605566]  [<ffffffff8407ccd0>] ? compat_start_thread+0x80/0x80
> > [ 1010.605569]  [<ffffffff851f5cb4>] ? __schedule+0x704/0x1770
> > [ 1010.605572]  [<ffffffff851f55b0>] ? io_schedule_timeout+0x390/0x390
> > [ 1010.605574]  [<ffffffff84541783>] ? cache_reap+0x173/0x200
> > [ 1010.605577]  [<ffffffff84197bed>] ? process_one_work+0x4ed/0xe60
> > [ 1010.605579]  [<ffffffff84198642>] ? worker_thread+0xe2/0xfd0
> > [ 1010.605581]  [<ffffffff8421f76c>] ? __wake_up_common+0xbc/0x160
> > [ 1010.605584]  [<ffffffff84198560>] ? process_one_work+0xe60/0xe60
> > [ 1010.605586]  [<ffffffff841a837c>] ? kthread+0x1cc/0x220
> > [ 1010.605589]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
> > [ 1010.605591]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
> > [ 1010.605594]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
> > [ 1010.605596]  [<ffffffff852016f5>] ? ret_from_fork+0x25/0x30
> > [ 1010.605598] ---[ end trace 49b46eb633ff1199 ]---
> > [ 1010.605948] usb 1-3.3: can't device_add, error -17
> > [ 1010.686729] usb 1-3.3: new high-speed USB device number 11 using xhci_hcd
> > [ 1010.712761] usb 1-3.3: New USB device found, idVendor=2040, idProduct=6513
> > [ 1010.712768] usb 1-3.3: New USB device strings: Mfr=0, Product=1, SerialNumber=2
> > [ 1010.712772] usb 1-3.3: Product: WinTV HVR-980
> > [ 1010.712775] usb 1-3.3: SerialNumber: 4028449018
> > [ 1010.714339] ------------[ cut here ]------------
> > [ 1010.714347] WARNING: CPU: 3 PID: 119 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x7b/0x90
> > [ 1010.714349] sysfs: cannot create duplicate filename '/bus/usb/devices/1-3.3'
> > [ 1010.714351] Modules linked in: lgdt330x em28xx_dvb dvb_core em28xx_alsa tuner_xc2028 tuner tvp5150 em28xx_v4l videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core em28xx tveeprom v4l2_common videodev media xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp tun bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter ip_tables x_tables cmac bnep cpufreq_powersave cpufreq_conservative cpufreq_userspace binfmt_misc parport_pc ppdev lp parport snd_hda_codec_hdmi iTCO_wdt snd_hda_codec_realtek iTCO_vendor_support snd_hda_codec_generic arc4 intel_rapl x86_pkg_temp_thermal iwlmvm intel_powerclamp coretemp kvm_intel mac80211 kvm i915
> > [ 1010.714409]  irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel iwlwifi pl2303 aesni_intel btusb aes_x86_64 usbserial lrw btrtl gf128mul glue_helper btbcm ablk_helper cryptd btintel bluetooth drm_kms_helper cfg80211 drm psmouse pcspkr i2c_i801 e1000e serio_raw snd_hda_intel snd_soc_rt5640 snd_hda_codec snd_soc_rl6231 snd_soc_ssm4567 mei_me i2c_smbus rfkill snd_hda_core ptp mei snd_soc_core ehci_pci sg lpc_ich shpchp mfd_core ehci_hcd pps_core snd_hwdep i2c_algo_bit snd_compress snd_pcm sdhci_acpi snd_timer battery snd sdhci elan_i2c snd_soc_sst_acpi mmc_core fjes dw_dmac i2c_hid soundcore snd_soc_sst_match i2c_designware_platform video i2c_designware_core acpi_pad acpi_als kfifo_buf tpm_tis button industrialio tpm_tis_core tpm ext4 crc16 jbd2 fscrypto mbcache dm_mod joydev evdev hid_logitech_hidpp
> > [ 1010.714475]  sd_mod hid_logitech_dj usbhid hid ahci libahci crc32c_intel libata xhci_pci xhci_hcd scsi_mod usbcore fan thermal
> > [ 1010.714490] CPU: 3 PID: 119 Comm: kworker/3:2 Tainted: G        W       4.9.0-rc8+ #14
> > [ 1010.714493] Hardware name:                  /NUC5i7RYB, BIOS RYBDWi35.86A.0350.2015.0812.1722 08/12/2015
> > [ 1010.714513] Workqueue: usb_hub_wq hub_event [usbcore]
> > [ 1010.714517]  0000000000000000 ffffffff848f56c5 ffff8803b1f7f858 0000000000000000
> > [ 1010.714522]  ffffffff8414f8f8 ffff88030000001f ffffed00763eff07 ffff8803b1f7f8f0
> > [ 1010.714527]  ffff8803b3ea1e60 0000000000000001 ffffffffffffffef ffff8803b45c6840
> > [ 1010.714532] Call Trace:
> > [ 1010.714543]  [<ffffffff848f56c5>] ? dump_stack+0x5c/0x77
> > [ 1010.714547]  [<ffffffff8414f8f8>] ? __warn+0x168/0x1a0
> > [ 1010.714551]  [<ffffffff8414f9e4>] ? warn_slowpath_fmt+0xb4/0xf0
> > [ 1010.714555]  [<ffffffff8414f930>] ? __warn+0x1a0/0x1a0
> > [ 1010.714560]  [<ffffffff845436c6>] ? kasan_kmalloc+0xa6/0xd0
> > [ 1010.714565]  [<ffffffff846ec2fa>] ? kernfs_path_from_node+0x4a/0x60
> > [ 1010.714568]  [<ffffffff846f66eb>] ? sysfs_warn_dup+0x7b/0x90
> > [ 1010.714573]  [<ffffffff846f6f26>] ? sysfs_do_create_link_sd.isra.2+0xb6/0xd0
> > [ 1010.714579]  [<ffffffff84cd5a08>] ? bus_add_device+0x318/0x6b0
> > [ 1010.714583]  [<ffffffff846f8693>] ? sysfs_create_groups+0x83/0x110
> > [ 1010.714587]  [<ffffffff84ccff87>] ? device_add+0x777/0x1350
> > [ 1010.714592]  [<ffffffff84ccf810>] ? device_private_init+0x180/0x180
> > [ 1010.714608]  [<ffffffffc00c0f77>] ? usb_new_device+0x707/0x1030 [usbcore]
> > [ 1010.714623]  [<ffffffffc00c58c5>] ? hub_event+0x1d65/0x3280 [usbcore]
> > [ 1010.714628]  [<ffffffff841eb4ab>] ? account_entity_dequeue+0x30b/0x4a0
> > [ 1010.714643]  [<ffffffffc00c3b60>] ? hub_port_debounce+0x280/0x280 [usbcore]
> > [ 1010.714648]  [<ffffffff8407ccd0>] ? compat_start_thread+0x80/0x80
> > [ 1010.714653]  [<ffffffff851f5cb4>] ? __schedule+0x704/0x1770
> > [ 1010.714657]  [<ffffffff851f55b0>] ? io_schedule_timeout+0x390/0x390
> > [ 1010.714661]  [<ffffffff84541783>] ? cache_reap+0x173/0x200
> > [ 1010.714666]  [<ffffffff84197bed>] ? process_one_work+0x4ed/0xe60
> > [ 1010.714670]  [<ffffffff84198642>] ? worker_thread+0xe2/0xfd0
> > [ 1010.714674]  [<ffffffff8421f76c>] ? __wake_up_common+0xbc/0x160
> > [ 1010.714678]  [<ffffffff84198560>] ? process_one_work+0xe60/0xe60
> > [ 1010.714682]  [<ffffffff841a837c>] ? kthread+0x1cc/0x220
> > [ 1010.714686]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
> > [ 1010.714691]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
> > [ 1010.714695]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
> > [ 1010.714699]  [<ffffffff852016f5>] ? ret_from_fork+0x25/0x30
> > [ 1010.714719] ---[ end trace 49b46eb633ff119a ]---
> > [ 1010.715706] usb 1-3.3: can't device_add, error -17
> > [ 1010.716223] usb 1-3-port3: unable to enumerate USB device
> > 
> > 
> > 
> > If so, it seems that the device was not properly unregistered. That's
> > weird, since everything sounded ok at device unregister:
> > 
> > [  999.740335] usb 1-3.3: em2882!3#0: USB disconnect, device number 7
> > [  999.742857] usb 1-3.3: em2882!3#0: Disconnecting
> > [  999.742874] usb 1-3.3: em2882!3#0: Closing video extension
> > [  999.743058] usb 1-3.3: em2882!3#0: V4L2 device vbi0 deregistered
> > [  999.744327] usb 1-3.3: em2882!3#0: V4L2 device video0 deregistered
> > [  999.747938] tvp5150 6-005c: tvp5150.c: removing tvp5150 adapter on address 0xb8
> > [  999.750085] xc2028 6-0061: xc2028_dvb_release called
> > [  999.750852] usb 1-3.3: em2882!3#0: Closing audio extension
> > [  999.754253] usb 1-3.3: em2882!3#0: Closing DVB extension
> > [  999.760360] xc2028 6-0061: xc2028_dvb_release called
> > [  999.760362] xc2028 6-0061: free_firmware called
> > [  999.760958] xc2028 6-0061: destroying instance
> > 
> > I'll try to bisect this.  
> 
> According with git bisect, the culprit is this patch:
> 
> ce8591ff023ef8e04750c2cc2882523619a80b58 is the first bad commit
> commit ce8591ff023ef8e04750c2cc2882523619a80b58
> Author: Mauro Carvalho Chehab <mchehab@s-opensource.com>
> Date:   Thu Oct 20 08:42:03 2016 -0200
> 
>     [media] em28xx: convert it from pr_foo() to dev_foo()
>     
>     Instead of using pr_foo(), use dev_foo(), with provides a
>     better output. As this device is a multi-interface one,
>     we'll set the device name to show the chipset and the driver
>     used.
>     
>     While here, get rid of printk continuation messages.
>     
>     Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
> 
> :040000 040000 834f13194c879d17f2b2ca79afbd1ed0999fbfeb 85ea8360d7adbf597ca1d6c5a8205b1a64666879 M	drivers
> 
> I'll do more tests and see what's wrong there.

I found the issue: driver's core doesn't like changing the device name,
as it breaks the unbind logic. The enclosed patch fixes it.

There's a drawback, though: it will now print log messages using the USB
address, instead of using "em28xx:":

[  132.398622] usb 1-3.3: new high-speed USB device number 9 using xhci_hcd
[  132.504308] usb 1-3.3: New USB device found, idVendor=2040, idProduct=6513
[  132.504314] usb 1-3.3: New USB device strings: Mfr=0, Product=1, SerialNumber=2
[  132.504316] usb 1-3.3: Product: WinTV HVR-980
[  132.504318] usb 1-3.3: SerialNumber: 4028449018
[  132.507651] usb 1-3.3: New device  WinTV HVR-980 @ 480 Mbps (2040:6513, interface 0, class 0)
[  132.507654] usb 1-3.3: Audio interface 0 found (Vendor Class)
[  132.507657] usb 1-3.3: Video interface 0 found: isoc
[  132.507658] usb 1-3.3: DVB interface 0 found: isoc
[  132.507777] usb 1-3.3: chip ID is em2882/3
[  132.708925] usb 1-3.3: EEPROM ID = 1a eb 67 95, EEPROM hash = 0x994b2bdd
[  132.708928] usb 1-3.3: EEPROM info:
[  132.708931] usb 1-3.3: 	AC97 audio (5 sample rates)
[  132.708932] usb 1-3.3: 	500mA max power
[  132.708935] usb 1-3.3: 	Table at offset 0x24, strings=0x1e82, 0x186a, 0x0000
[  132.708937] usb 1-3.3: Identified as Hauppauge WinTV HVR 950 (card=16)
[  132.710934] usb 1-3.3: analog set to isoc mode.
[  132.710936] usb 1-3.3: dvb set to isoc mode.
[  132.711582] usb 1-3.3: Registering V4L2 extension
[  132.858224] usb 1-3.3: Config register raw data: 0xd0
[  132.859738] usb 1-3.3: AC97 vendor ID = 0xffffffff
[  132.859918] usb 1-3.3: AC97 features = 0x6a90
[  132.859920] usb 1-3.3: Empia 202 AC97 audio processor detected
[  134.636310] usb 1-3.3: V4L2 video device registered as video0
[  134.636319] usb 1-3.3: V4L2 VBI device registered as vbi0
[  134.637132] usb 1-3.3: V4L2 extension successfully initialized
[  134.637138] usb 1-3.3: Binding audio extension
[  134.637142] usb 1-3.3: em28xx-audio.c: Copyright (C) 2006 Markus Rechberger
[  134.637147] usb 1-3.3: em28xx-audio.c: Copyright (C) 2007-2016 Mauro Carvalho Chehab
[  134.638521] usb 1-3.3: Endpoint 0x83 high-speed on intf 0 alt 7 interval = 8, size 196
[  134.638529] usb 1-3.3: Number of URBs: 1, with 64 packets and 192 size
[  134.643544] usb 1-3.3: Audio extension successfully initialized
[  134.643552] usb 1-3.3: Binding DVB extension
[  134.719239] usb 1-3.3: xc3028 attached
[  134.719256] usb 1-3.3: DVB: registering adapter 0 frontend 0 (LG Electronics LGDT3303 VSB/QAM Frontend)...
[  134.724465] usb 1-3.3: DVB extension successfully initialized

Not sure how to address it.

Regards,
Mauro

diff --git a/drivers/media/usb/em28xx/em28xx-cards.c b/drivers/media/usb/em28xx/em28xx-cards.c
index b516c691b9eb..50e4c6e51ee7 100644
--- a/drivers/media/usb/em28xx/em28xx-cards.c
+++ b/drivers/media/usb/em28xx/em28xx-cards.c
@@ -3236,8 +3236,7 @@ static int em28xx_init_dev(struct em28xx *dev, struct usb_device *udev,
 			   int minor)
 {
 	int retval;
-	static const char *default_chip_name = "em28xx";
-	const char *chip_name = default_chip_name;
+	const char *chip_name = NULL;
 
 	dev->udev = udev;
 	mutex_init(&dev->ctrl_urb_lock);
@@ -3324,14 +3323,9 @@ static int em28xx_init_dev(struct em28xx *dev, struct usb_device *udev,
 			break;
 		}
 	}
-
-	dev_set_name(&dev->udev->dev, "%d-%s: %s#%d",
-		     dev->udev->bus->busnum, dev->udev->devpath,
-		     chip_name, dev->devno);
-
-	if (chip_name == default_chip_name)
-			dev_info(&dev->udev->dev,
-				 "unknown em28xx chip ID (%d)\n", dev->chip_id);
+	if (!chip_name)
+		dev_info(&dev->udev->dev,
+			 "unknown em28xx chip ID (%d)\n", dev->chip_id);
 	else
 		dev_info(&dev->udev->dev, "chip ID is %s\n", chip_name);
 

Thanks,
Mauro

^ permalink raw reply related	[flat|nested] 6+ messages in thread

* Re: em28xx broken 4.9.0-rc6+
  2016-12-07 14:55     ` Mauro Carvalho Chehab
@ 2016-12-07 15:04       ` Antti Palosaari
  2016-12-07 15:20         ` Mauro Carvalho Chehab
  0 siblings, 1 reply; 6+ messages in thread
From: Antti Palosaari @ 2016-12-07 15:04 UTC (permalink / raw)
  To: Mauro Carvalho Chehab; +Cc: LMML



On 12/07/2016 04:55 PM, Mauro Carvalho Chehab wrote:
> Em Wed, 7 Dec 2016 12:22:01 -0200
> Mauro Carvalho Chehab <mchehab@s-opensource.com> escreveu:
>
>> Em Tue, 6 Dec 2016 13:41:38 -0200
>> Mauro Carvalho Chehab <mchehab@s-opensource.com> escreveu:
>>
>>> Em Tue, 6 Dec 2016 01:06:17 +0200
>>> Antti Palosaari <crope@iki.fi> escreveu:
>>>
>>>> Hello Mauro
>>>> I just noticed current em28xx driver seem to be broken. When I plug
>>>> device first time it loads correctly, but when I re-plug it, it does not
>>>> work anymore but yells a lot of noise to message log. Tested with PCTV
>>>> 290e and 292e both same. Other USB DVB devices are working so it is very
>>>> likely em28xx driver bug.
>>>>
>>>> Easy to reproduce:
>>>> plug device
>>>> unplug device
>>>> plug device
>>>
>>>
>>> Are you referring to those:
>>>
>>> [ 1010.310320] WARNING: CPU: 3 PID: 119 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x7b/0x90
>>> [ 1010.310323] sysfs: cannot create duplicate filename '/bus/usb/devices/1-3.3'
>>> [ 1010.310325] Modules linked in: lgdt330x em28xx_dvb dvb_core em28xx_alsa tuner_xc2028 tuner tvp5150 em28xx_v4l videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core em28xx tveeprom v4l2_common videodev media xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp tun bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter ip_tables x_tables cmac bnep cpufreq_powersave cpufreq_conservative cpufreq_userspace binfmt_misc parport_pc ppdev lp parport snd_hda_codec_hdmi iTCO_wdt snd_hda_codec_realtek iTCO_vendor_support snd_hda_codec_generic arc4 intel_rapl x86_pkg_temp_thermal iwlmvm intel_powerclamp coretemp kvm_intel mac80211 kvm i915
>>> [ 1010.310383]  irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel iwlwifi pl2303 aesni_intel btusb aes_x86_64 usbserial lrw btrtl gf128mul glue_helper btbcm ablk_helper cryptd btintel bluetooth drm_kms_helper cfg80211 drm psmouse pcspkr i2c_i801 e1000e serio_raw snd_hda_intel snd_soc_rt5640 snd_hda_codec snd_soc_rl6231 snd_soc_ssm4567 mei_me i2c_smbus rfkill snd_hda_core ptp mei snd_soc_core ehci_pci sg lpc_ich shpchp mfd_core ehci_hcd pps_core snd_hwdep i2c_algo_bit snd_compress snd_pcm sdhci_acpi snd_timer battery snd sdhci elan_i2c snd_soc_sst_acpi mmc_core fjes dw_dmac i2c_hid soundcore snd_soc_sst_match i2c_designware_platform video i2c_designware_core acpi_pad acpi_als kfifo_buf tpm_tis button industrialio tpm_tis_core tpm ext4 crc16 jbd2 fscrypto mbcache dm_mod joydev evdev hid_logitech_hidpp
>>> [ 1010.310449]  sd_mod hid_logitech_dj usbhid hid ahci libahci crc32c_intel libata xhci_pci xhci_hcd scsi_mod usbcore fan thermal
>>> [ 1010.310464] CPU: 3 PID: 119 Comm: kworker/3:2 Not tainted 4.9.0-rc8+ #14
>>> [ 1010.310466] Hardware name:                  /NUC5i7RYB, BIOS RYBDWi35.86A.0350.2015.0812.1722 08/12/2015
>>> [ 1010.310487] Workqueue: usb_hub_wq hub_event [usbcore]
>>> [ 1010.310490]  0000000000000000 ffffffff848f56c5 ffff8803b1f7f858 0000000000000000
>>> [ 1010.310496]  ffffffff8414f8f8 ffff88030000001f ffffed00763eff07 ffff8803b1f7f8f0
>>> [ 1010.310501]  ffff8803b3ea1e60 0000000000000001 ffffffffffffffef ffff8803b45c6840
>>> [ 1010.310505] Call Trace:
>>> [ 1010.310517]  [<ffffffff848f56c5>] ? dump_stack+0x5c/0x77
>>> [ 1010.310522]  [<ffffffff8414f8f8>] ? __warn+0x168/0x1a0
>>> [ 1010.310526]  [<ffffffff8414f9e4>] ? warn_slowpath_fmt+0xb4/0xf0
>>> [ 1010.310529]  [<ffffffff8414f930>] ? __warn+0x1a0/0x1a0
>>> [ 1010.310534]  [<ffffffff845436c6>] ? kasan_kmalloc+0xa6/0xd0
>>> [ 1010.310539]  [<ffffffff846ec2fa>] ? kernfs_path_from_node+0x4a/0x60
>>> [ 1010.310543]  [<ffffffff846f66eb>] ? sysfs_warn_dup+0x7b/0x90
>>> [ 1010.310547]  [<ffffffff846f6f26>] ? sysfs_do_create_link_sd.isra.2+0xb6/0xd0
>>> [ 1010.310553]  [<ffffffff84cd5a08>] ? bus_add_device+0x318/0x6b0
>>> [ 1010.310557]  [<ffffffff846f8693>] ? sysfs_create_groups+0x83/0x110
>>> [ 1010.310562]  [<ffffffff84ccff87>] ? device_add+0x777/0x1350
>>> [ 1010.310567]  [<ffffffff84ccf810>] ? device_private_init+0x180/0x180
>>> [ 1010.310583]  [<ffffffffc00c0f77>] ? usb_new_device+0x707/0x1030 [usbcore]
>>> [ 1010.310598]  [<ffffffffc00c58c5>] ? hub_event+0x1d65/0x3280 [usbcore]
>>> [ 1010.310604]  [<ffffffff841eb4ab>] ? account_entity_dequeue+0x30b/0x4a0
>>> [ 1010.310618]  [<ffffffffc00c3b60>] ? hub_port_debounce+0x280/0x280 [usbcore]
>>> [ 1010.310624]  [<ffffffff8407ccd0>] ? compat_start_thread+0x80/0x80
>>> [ 1010.310629]  [<ffffffff851f5cb4>] ? __schedule+0x704/0x1770
>>> [ 1010.310633]  [<ffffffff851f55b0>] ? io_schedule_timeout+0x390/0x390
>>> [ 1010.310638]  [<ffffffff84541783>] ? cache_reap+0x173/0x200
>>> [ 1010.310642]  [<ffffffff84197bed>] ? process_one_work+0x4ed/0xe60
>>> [ 1010.310646]  [<ffffffff84198642>] ? worker_thread+0xe2/0xfd0
>>> [ 1010.310650]  [<ffffffff8421f76c>] ? __wake_up_common+0xbc/0x160
>>> [ 1010.310654]  [<ffffffff84198560>] ? process_one_work+0xe60/0xe60
>>> [ 1010.310658]  [<ffffffff841a837c>] ? kthread+0x1cc/0x220
>>> [ 1010.310663]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
>>> [ 1010.310667]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
>>> [ 1010.310671]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
>>> [ 1010.310675]  [<ffffffff852016f5>] ? ret_from_fork+0x25/0x30
>>> [ 1010.310698] ---[ end trace 49b46eb633ff1197 ]---
>>> [ 1010.311298] usb 1-3.3: can't device_add, error -17
>>> [ 1010.390703] usb 1-3.3: new high-speed USB device number 9 using xhci_hcd
>>> [ 1010.496337] usb 1-3.3: New USB device found, idVendor=2040, idProduct=6513
>>> [ 1010.496343] usb 1-3.3: New USB device strings: Mfr=0, Product=1, SerialNumber=2
>>> [ 1010.496345] usb 1-3.3: Product: WinTV HVR-980
>>> [ 1010.496347] usb 1-3.3: SerialNumber: 4028449018
>>> [ 1010.497259] ------------[ cut here ]------------
>>> [ 1010.497264] WARNING: CPU: 3 PID: 119 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x7b/0x90
>>> [ 1010.497266] sysfs: cannot create duplicate filename '/bus/usb/devices/1-3.3'
>>> [ 1010.497267] Modules linked in: lgdt330x em28xx_dvb dvb_core em28xx_alsa tuner_xc2028 tuner tvp5150 em28xx_v4l videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core em28xx tveeprom v4l2_common videodev media xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp tun bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter ip_tables x_tables cmac bnep cpufreq_powersave cpufreq_conservative cpufreq_userspace binfmt_misc parport_pc ppdev lp parport snd_hda_codec_hdmi iTCO_wdt snd_hda_codec_realtek iTCO_vendor_support snd_hda_codec_generic arc4 intel_rapl x86_pkg_temp_thermal iwlmvm intel_powerclamp coretemp kvm_intel mac80211 kvm i915
>>> [ 1010.497307]  irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel iwlwifi pl2303 aesni_intel btusb aes_x86_64 usbserial lrw btrtl gf128mul glue_helper btbcm ablk_helper cryptd btintel bluetooth drm_kms_helper cfg80211 drm psmouse pcspkr i2c_i801 e1000e serio_raw snd_hda_intel snd_soc_rt5640 snd_hda_codec snd_soc_rl6231 snd_soc_ssm4567 mei_me i2c_smbus rfkill snd_hda_core ptp mei snd_soc_core ehci_pci sg lpc_ich shpchp mfd_core ehci_hcd pps_core snd_hwdep i2c_algo_bit snd_compress snd_pcm sdhci_acpi snd_timer battery snd sdhci elan_i2c snd_soc_sst_acpi mmc_core fjes dw_dmac i2c_hid soundcore snd_soc_sst_match i2c_designware_platform video i2c_designware_core acpi_pad acpi_als kfifo_buf tpm_tis button industrialio tpm_tis_core tpm ext4 crc16 jbd2 fscrypto mbcache dm_mod joydev evdev hid_logitech_hidpp
>>> [ 1010.497352]  sd_mod hid_logitech_dj usbhid hid ahci libahci crc32c_intel libata xhci_pci xhci_hcd scsi_mod usbcore fan thermal
>>> [ 1010.497362] CPU: 3 PID: 119 Comm: kworker/3:2 Tainted: G        W       4.9.0-rc8+ #14
>>> [ 1010.497363] Hardware name:                  /NUC5i7RYB, BIOS RYBDWi35.86A.0350.2015.0812.1722 08/12/2015
>>> [ 1010.497377] Workqueue: usb_hub_wq hub_event [usbcore]
>>> [ 1010.497379]  0000000000000000 ffffffff848f56c5 ffff8803b1f7f858 0000000000000000
>>> [ 1010.497382]  ffffffff8414f8f8 ffff88030000001f ffffed00763eff07 ffff8803b1f7f8f0
>>> [ 1010.497385]  ffff8803b3ea1e60 0000000000000001 ffffffffffffffef ffff8803b45c6840
>>> [ 1010.497387] Call Trace:
>>> [ 1010.497395]  [<ffffffff848f56c5>] ? dump_stack+0x5c/0x77
>>> [ 1010.497398]  [<ffffffff8414f8f8>] ? __warn+0x168/0x1a0
>>> [ 1010.497400]  [<ffffffff8414f9e4>] ? warn_slowpath_fmt+0xb4/0xf0
>>> [ 1010.497402]  [<ffffffff8414f930>] ? __warn+0x1a0/0x1a0
>>> [ 1010.497405]  [<ffffffff845436c6>] ? kasan_kmalloc+0xa6/0xd0
>>> [ 1010.497408]  [<ffffffff846ec2fa>] ? kernfs_path_from_node+0x4a/0x60
>>> [ 1010.497410]  [<ffffffff846f66eb>] ? sysfs_warn_dup+0x7b/0x90
>>> [ 1010.497412]  [<ffffffff846f6f26>] ? sysfs_do_create_link_sd.isra.2+0xb6/0xd0
>>> [ 1010.497416]  [<ffffffff84cd5a08>] ? bus_add_device+0x318/0x6b0
>>> [ 1010.497419]  [<ffffffff846f8693>] ? sysfs_create_groups+0x83/0x110
>>> [ 1010.497421]  [<ffffffff84ccff87>] ? device_add+0x777/0x1350
>>> [ 1010.497424]  [<ffffffff84ccf810>] ? device_private_init+0x180/0x180
>>> [ 1010.497433]  [<ffffffffc00c0f77>] ? usb_new_device+0x707/0x1030 [usbcore]
>>> [ 1010.497441]  [<ffffffffc00c58c5>] ? hub_event+0x1d65/0x3280 [usbcore]
>>> [ 1010.497445]  [<ffffffff841eb4ab>] ? account_entity_dequeue+0x30b/0x4a0
>>> [ 1010.497454]  [<ffffffffc00c3b60>] ? hub_port_debounce+0x280/0x280 [usbcore]
>>> [ 1010.497457]  [<ffffffff8407ccd0>] ? compat_start_thread+0x80/0x80
>>> [ 1010.497460]  [<ffffffff851f5cb4>] ? __schedule+0x704/0x1770
>>> [ 1010.497462]  [<ffffffff851f55b0>] ? io_schedule_timeout+0x390/0x390
>>> [ 1010.497465]  [<ffffffff84541783>] ? cache_reap+0x173/0x200
>>> [ 1010.497468]  [<ffffffff84197bed>] ? process_one_work+0x4ed/0xe60
>>> [ 1010.497470]  [<ffffffff84198642>] ? worker_thread+0xe2/0xfd0
>>> [ 1010.497473]  [<ffffffff8421f76c>] ? __wake_up_common+0xbc/0x160
>>> [ 1010.497475]  [<ffffffff84198560>] ? process_one_work+0xe60/0xe60
>>> [ 1010.497477]  [<ffffffff841a837c>] ? kthread+0x1cc/0x220
>>> [ 1010.497480]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
>>> [ 1010.497482]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
>>> [ 1010.497485]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
>>> [ 1010.497487]  [<ffffffff852016f5>] ? ret_from_fork+0x25/0x30
>>> [ 1010.497489] ---[ end trace 49b46eb633ff1198 ]---
>>> [ 1010.497829] usb 1-3.3: can't device_add, error -17
>>> [ 1010.578707] usb 1-3.3: new high-speed USB device number 10 using xhci_hcd
>>> [ 1010.604448] usb 1-3.3: New USB device found, idVendor=2040, idProduct=6513
>>> [ 1010.604452] usb 1-3.3: New USB device strings: Mfr=0, Product=1, SerialNumber=2
>>> [ 1010.604454] usb 1-3.3: Product: WinTV HVR-980
>>> [ 1010.604456] usb 1-3.3: SerialNumber: 4028449018
>>> [ 1010.605369] ------------[ cut here ]------------
>>> [ 1010.605374] WARNING: CPU: 3 PID: 119 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x7b/0x90
>>> [ 1010.605375] sysfs: cannot create duplicate filename '/bus/usb/devices/1-3.3'
>>> [ 1010.605376] Modules linked in: lgdt330x em28xx_dvb dvb_core em28xx_alsa tuner_xc2028 tuner tvp5150 em28xx_v4l videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core em28xx tveeprom v4l2_common videodev media xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp tun bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter ip_tables x_tables cmac bnep cpufreq_powersave cpufreq_conservative cpufreq_userspace binfmt_misc parport_pc ppdev lp parport snd_hda_codec_hdmi iTCO_wdt snd_hda_codec_realtek iTCO_vendor_support snd_hda_codec_generic arc4 intel_rapl x86_pkg_temp_thermal iwlmvm intel_powerclamp coretemp kvm_intel mac80211 kvm i915
>>> [ 1010.605415]  irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel iwlwifi pl2303 aesni_intel btusb aes_x86_64 usbserial lrw btrtl gf128mul glue_helper btbcm ablk_helper cryptd btintel bluetooth drm_kms_helper cfg80211 drm psmouse pcspkr i2c_i801 e1000e serio_raw snd_hda_intel snd_soc_rt5640 snd_hda_codec snd_soc_rl6231 snd_soc_ssm4567 mei_me i2c_smbus rfkill snd_hda_core ptp mei snd_soc_core ehci_pci sg lpc_ich shpchp mfd_core ehci_hcd pps_core snd_hwdep i2c_algo_bit snd_compress snd_pcm sdhci_acpi snd_timer battery snd sdhci elan_i2c snd_soc_sst_acpi mmc_core fjes dw_dmac i2c_hid soundcore snd_soc_sst_match i2c_designware_platform video i2c_designware_core acpi_pad acpi_als kfifo_buf tpm_tis button industrialio tpm_tis_core tpm ext4 crc16 jbd2 fscrypto mbcache dm_mod joydev evdev hid_logitech_hidpp
>>> [ 1010.605459]  sd_mod hid_logitech_dj usbhid hid ahci libahci crc32c_intel libata xhci_pci xhci_hcd scsi_mod usbcore fan thermal
>>> [ 1010.605469] CPU: 3 PID: 119 Comm: kworker/3:2 Tainted: G        W       4.9.0-rc8+ #14
>>> [ 1010.605471] Hardware name:                  /NUC5i7RYB, BIOS RYBDWi35.86A.0350.2015.0812.1722 08/12/2015
>>> [ 1010.605484] Workqueue: usb_hub_wq hub_event [usbcore]
>>> [ 1010.605486]  0000000000000000 ffffffff848f56c5 ffff8803b1f7f858 0000000000000000
>>> [ 1010.605490]  ffffffff8414f8f8 ffff88030000001f ffffed00763eff07 ffff8803b1f7f8f0
>>> [ 1010.605492]  ffff8803b3ea1e60 0000000000000001 ffffffffffffffef ffff8803b45c6840
>>> [ 1010.605495] Call Trace:
>>> [ 1010.605502]  [<ffffffff848f56c5>] ? dump_stack+0x5c/0x77
>>> [ 1010.605505]  [<ffffffff8414f8f8>] ? __warn+0x168/0x1a0
>>> [ 1010.605508]  [<ffffffff8414f9e4>] ? warn_slowpath_fmt+0xb4/0xf0
>>> [ 1010.605510]  [<ffffffff8414f930>] ? __warn+0x1a0/0x1a0
>>> [ 1010.605513]  [<ffffffff845436c6>] ? kasan_kmalloc+0xa6/0xd0
>>> [ 1010.605516]  [<ffffffff846ec2fa>] ? kernfs_path_from_node+0x4a/0x60
>>> [ 1010.605518]  [<ffffffff846f66eb>] ? sysfs_warn_dup+0x7b/0x90
>>> [ 1010.605520]  [<ffffffff846f6f26>] ? sysfs_do_create_link_sd.isra.2+0xb6/0xd0
>>> [ 1010.605524]  [<ffffffff84cd5a08>] ? bus_add_device+0x318/0x6b0
>>> [ 1010.605527]  [<ffffffff846f8693>] ? sysfs_create_groups+0x83/0x110
>>> [ 1010.605529]  [<ffffffff84ccff87>] ? device_add+0x777/0x1350
>>> [ 1010.605532]  [<ffffffff84ccf810>] ? device_private_init+0x180/0x180
>>> [ 1010.605542]  [<ffffffffc00c0f77>] ? usb_new_device+0x707/0x1030 [usbcore]
>>> [ 1010.605550]  [<ffffffffc00c58c5>] ? hub_event+0x1d65/0x3280 [usbcore]
>>> [ 1010.605554]  [<ffffffff841eb4ab>] ? account_entity_dequeue+0x30b/0x4a0
>>> [ 1010.605563]  [<ffffffffc00c3b60>] ? hub_port_debounce+0x280/0x280 [usbcore]
>>> [ 1010.605566]  [<ffffffff8407ccd0>] ? compat_start_thread+0x80/0x80
>>> [ 1010.605569]  [<ffffffff851f5cb4>] ? __schedule+0x704/0x1770
>>> [ 1010.605572]  [<ffffffff851f55b0>] ? io_schedule_timeout+0x390/0x390
>>> [ 1010.605574]  [<ffffffff84541783>] ? cache_reap+0x173/0x200
>>> [ 1010.605577]  [<ffffffff84197bed>] ? process_one_work+0x4ed/0xe60
>>> [ 1010.605579]  [<ffffffff84198642>] ? worker_thread+0xe2/0xfd0
>>> [ 1010.605581]  [<ffffffff8421f76c>] ? __wake_up_common+0xbc/0x160
>>> [ 1010.605584]  [<ffffffff84198560>] ? process_one_work+0xe60/0xe60
>>> [ 1010.605586]  [<ffffffff841a837c>] ? kthread+0x1cc/0x220
>>> [ 1010.605589]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
>>> [ 1010.605591]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
>>> [ 1010.605594]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
>>> [ 1010.605596]  [<ffffffff852016f5>] ? ret_from_fork+0x25/0x30
>>> [ 1010.605598] ---[ end trace 49b46eb633ff1199 ]---
>>> [ 1010.605948] usb 1-3.3: can't device_add, error -17
>>> [ 1010.686729] usb 1-3.3: new high-speed USB device number 11 using xhci_hcd
>>> [ 1010.712761] usb 1-3.3: New USB device found, idVendor=2040, idProduct=6513
>>> [ 1010.712768] usb 1-3.3: New USB device strings: Mfr=0, Product=1, SerialNumber=2
>>> [ 1010.712772] usb 1-3.3: Product: WinTV HVR-980
>>> [ 1010.712775] usb 1-3.3: SerialNumber: 4028449018
>>> [ 1010.714339] ------------[ cut here ]------------
>>> [ 1010.714347] WARNING: CPU: 3 PID: 119 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x7b/0x90
>>> [ 1010.714349] sysfs: cannot create duplicate filename '/bus/usb/devices/1-3.3'
>>> [ 1010.714351] Modules linked in: lgdt330x em28xx_dvb dvb_core em28xx_alsa tuner_xc2028 tuner tvp5150 em28xx_v4l videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core em28xx tveeprom v4l2_common videodev media xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp tun bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter ip_tables x_tables cmac bnep cpufreq_powersave cpufreq_conservative cpufreq_userspace binfmt_misc parport_pc ppdev lp parport snd_hda_codec_hdmi iTCO_wdt snd_hda_codec_realtek iTCO_vendor_support snd_hda_codec_generic arc4 intel_rapl x86_pkg_temp_thermal iwlmvm intel_powerclamp coretemp kvm_intel mac80211 kvm i915
>>> [ 1010.714409]  irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel iwlwifi pl2303 aesni_intel btusb aes_x86_64 usbserial lrw btrtl gf128mul glue_helper btbcm ablk_helper cryptd btintel bluetooth drm_kms_helper cfg80211 drm psmouse pcspkr i2c_i801 e1000e serio_raw snd_hda_intel snd_soc_rt5640 snd_hda_codec snd_soc_rl6231 snd_soc_ssm4567 mei_me i2c_smbus rfkill snd_hda_core ptp mei snd_soc_core ehci_pci sg lpc_ich shpchp mfd_core ehci_hcd pps_core snd_hwdep i2c_algo_bit snd_compress snd_pcm sdhci_acpi snd_timer battery snd sdhci elan_i2c snd_soc_sst_acpi mmc_core fjes dw_dmac i2c_hid soundcore snd_soc_sst_match i2c_designware_platform video i2c_designware_core acpi_pad acpi_als kfifo_buf tpm_tis button industrialio tpm_tis_core tpm ext4 crc16 jbd2 fscrypto mbcache dm_mod joydev evdev hid_logitech_hidpp
>>> [ 1010.714475]  sd_mod hid_logitech_dj usbhid hid ahci libahci crc32c_intel libata xhci_pci xhci_hcd scsi_mod usbcore fan thermal
>>> [ 1010.714490] CPU: 3 PID: 119 Comm: kworker/3:2 Tainted: G        W       4.9.0-rc8+ #14
>>> [ 1010.714493] Hardware name:                  /NUC5i7RYB, BIOS RYBDWi35.86A.0350.2015.0812.1722 08/12/2015
>>> [ 1010.714513] Workqueue: usb_hub_wq hub_event [usbcore]
>>> [ 1010.714517]  0000000000000000 ffffffff848f56c5 ffff8803b1f7f858 0000000000000000
>>> [ 1010.714522]  ffffffff8414f8f8 ffff88030000001f ffffed00763eff07 ffff8803b1f7f8f0
>>> [ 1010.714527]  ffff8803b3ea1e60 0000000000000001 ffffffffffffffef ffff8803b45c6840
>>> [ 1010.714532] Call Trace:
>>> [ 1010.714543]  [<ffffffff848f56c5>] ? dump_stack+0x5c/0x77
>>> [ 1010.714547]  [<ffffffff8414f8f8>] ? __warn+0x168/0x1a0
>>> [ 1010.714551]  [<ffffffff8414f9e4>] ? warn_slowpath_fmt+0xb4/0xf0
>>> [ 1010.714555]  [<ffffffff8414f930>] ? __warn+0x1a0/0x1a0
>>> [ 1010.714560]  [<ffffffff845436c6>] ? kasan_kmalloc+0xa6/0xd0
>>> [ 1010.714565]  [<ffffffff846ec2fa>] ? kernfs_path_from_node+0x4a/0x60
>>> [ 1010.714568]  [<ffffffff846f66eb>] ? sysfs_warn_dup+0x7b/0x90
>>> [ 1010.714573]  [<ffffffff846f6f26>] ? sysfs_do_create_link_sd.isra.2+0xb6/0xd0
>>> [ 1010.714579]  [<ffffffff84cd5a08>] ? bus_add_device+0x318/0x6b0
>>> [ 1010.714583]  [<ffffffff846f8693>] ? sysfs_create_groups+0x83/0x110
>>> [ 1010.714587]  [<ffffffff84ccff87>] ? device_add+0x777/0x1350
>>> [ 1010.714592]  [<ffffffff84ccf810>] ? device_private_init+0x180/0x180
>>> [ 1010.714608]  [<ffffffffc00c0f77>] ? usb_new_device+0x707/0x1030 [usbcore]
>>> [ 1010.714623]  [<ffffffffc00c58c5>] ? hub_event+0x1d65/0x3280 [usbcore]
>>> [ 1010.714628]  [<ffffffff841eb4ab>] ? account_entity_dequeue+0x30b/0x4a0
>>> [ 1010.714643]  [<ffffffffc00c3b60>] ? hub_port_debounce+0x280/0x280 [usbcore]
>>> [ 1010.714648]  [<ffffffff8407ccd0>] ? compat_start_thread+0x80/0x80
>>> [ 1010.714653]  [<ffffffff851f5cb4>] ? __schedule+0x704/0x1770
>>> [ 1010.714657]  [<ffffffff851f55b0>] ? io_schedule_timeout+0x390/0x390
>>> [ 1010.714661]  [<ffffffff84541783>] ? cache_reap+0x173/0x200
>>> [ 1010.714666]  [<ffffffff84197bed>] ? process_one_work+0x4ed/0xe60
>>> [ 1010.714670]  [<ffffffff84198642>] ? worker_thread+0xe2/0xfd0
>>> [ 1010.714674]  [<ffffffff8421f76c>] ? __wake_up_common+0xbc/0x160
>>> [ 1010.714678]  [<ffffffff84198560>] ? process_one_work+0xe60/0xe60
>>> [ 1010.714682]  [<ffffffff841a837c>] ? kthread+0x1cc/0x220
>>> [ 1010.714686]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
>>> [ 1010.714691]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
>>> [ 1010.714695]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
>>> [ 1010.714699]  [<ffffffff852016f5>] ? ret_from_fork+0x25/0x30
>>> [ 1010.714719] ---[ end trace 49b46eb633ff119a ]---
>>> [ 1010.715706] usb 1-3.3: can't device_add, error -17
>>> [ 1010.716223] usb 1-3-port3: unable to enumerate USB device
>>>
>>>
>>>
>>> If so, it seems that the device was not properly unregistered. That's
>>> weird, since everything sounded ok at device unregister:
>>>
>>> [  999.740335] usb 1-3.3: em2882!3#0: USB disconnect, device number 7
>>> [  999.742857] usb 1-3.3: em2882!3#0: Disconnecting
>>> [  999.742874] usb 1-3.3: em2882!3#0: Closing video extension
>>> [  999.743058] usb 1-3.3: em2882!3#0: V4L2 device vbi0 deregistered
>>> [  999.744327] usb 1-3.3: em2882!3#0: V4L2 device video0 deregistered
>>> [  999.747938] tvp5150 6-005c: tvp5150.c: removing tvp5150 adapter on address 0xb8
>>> [  999.750085] xc2028 6-0061: xc2028_dvb_release called
>>> [  999.750852] usb 1-3.3: em2882!3#0: Closing audio extension
>>> [  999.754253] usb 1-3.3: em2882!3#0: Closing DVB extension
>>> [  999.760360] xc2028 6-0061: xc2028_dvb_release called
>>> [  999.760362] xc2028 6-0061: free_firmware called
>>> [  999.760958] xc2028 6-0061: destroying instance
>>>
>>> I'll try to bisect this.
>>
>> According with git bisect, the culprit is this patch:
>>
>> ce8591ff023ef8e04750c2cc2882523619a80b58 is the first bad commit
>> commit ce8591ff023ef8e04750c2cc2882523619a80b58
>> Author: Mauro Carvalho Chehab <mchehab@s-opensource.com>
>> Date:   Thu Oct 20 08:42:03 2016 -0200
>>
>>     [media] em28xx: convert it from pr_foo() to dev_foo()
>>
>>     Instead of using pr_foo(), use dev_foo(), with provides a
>>     better output. As this device is a multi-interface one,
>>     we'll set the device name to show the chipset and the driver
>>     used.
>>
>>     While here, get rid of printk continuation messages.
>>
>>     Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
>>
>> :040000 040000 834f13194c879d17f2b2ca79afbd1ed0999fbfeb 85ea8360d7adbf597ca1d6c5a8205b1a64666879 M	drivers
>>
>> I'll do more tests and see what's wrong there.
>
> I found the issue: driver's core doesn't like changing the device name,
> as it breaks the unbind logic. The enclosed patch fixes it.
>
> There's a drawback, though: it will now print log messages using the USB
> address, instead of using "em28xx:":
>
> [  132.398622] usb 1-3.3: new high-speed USB device number 9 using xhci_hcd
> [  132.504308] usb 1-3.3: New USB device found, idVendor=2040, idProduct=6513
> [  132.504314] usb 1-3.3: New USB device strings: Mfr=0, Product=1, SerialNumber=2
> [  132.504316] usb 1-3.3: Product: WinTV HVR-980
> [  132.504318] usb 1-3.3: SerialNumber: 4028449018
> [  132.507651] usb 1-3.3: New device  WinTV HVR-980 @ 480 Mbps (2040:6513, interface 0, class 0)
> [  132.507654] usb 1-3.3: Audio interface 0 found (Vendor Class)
> [  132.507657] usb 1-3.3: Video interface 0 found: isoc
> [  132.507658] usb 1-3.3: DVB interface 0 found: isoc
> [  132.507777] usb 1-3.3: chip ID is em2882/3
> [  132.708925] usb 1-3.3: EEPROM ID = 1a eb 67 95, EEPROM hash = 0x994b2bdd
> [  132.708928] usb 1-3.3: EEPROM info:
> [  132.708931] usb 1-3.3: 	AC97 audio (5 sample rates)
> [  132.708932] usb 1-3.3: 	500mA max power
> [  132.708935] usb 1-3.3: 	Table at offset 0x24, strings=0x1e82, 0x186a, 0x0000
> [  132.708937] usb 1-3.3: Identified as Hauppauge WinTV HVR 950 (card=16)
> [  132.710934] usb 1-3.3: analog set to isoc mode.
> [  132.710936] usb 1-3.3: dvb set to isoc mode.
> [  132.711582] usb 1-3.3: Registering V4L2 extension
> [  132.858224] usb 1-3.3: Config register raw data: 0xd0
> [  132.859738] usb 1-3.3: AC97 vendor ID = 0xffffffff
> [  132.859918] usb 1-3.3: AC97 features = 0x6a90
> [  132.859920] usb 1-3.3: Empia 202 AC97 audio processor detected
> [  134.636310] usb 1-3.3: V4L2 video device registered as video0
> [  134.636319] usb 1-3.3: V4L2 VBI device registered as vbi0
> [  134.637132] usb 1-3.3: V4L2 extension successfully initialized
> [  134.637138] usb 1-3.3: Binding audio extension
> [  134.637142] usb 1-3.3: em28xx-audio.c: Copyright (C) 2006 Markus Rechberger
> [  134.637147] usb 1-3.3: em28xx-audio.c: Copyright (C) 2007-2016 Mauro Carvalho Chehab
> [  134.638521] usb 1-3.3: Endpoint 0x83 high-speed on intf 0 alt 7 interval = 8, size 196
> [  134.638529] usb 1-3.3: Number of URBs: 1, with 64 packets and 192 size
> [  134.643544] usb 1-3.3: Audio extension successfully initialized
> [  134.643552] usb 1-3.3: Binding DVB extension
> [  134.719239] usb 1-3.3: xc3028 attached
> [  134.719256] usb 1-3.3: DVB: registering adapter 0 frontend 0 (LG Electronics LGDT3303 VSB/QAM Frontend)...
> [  134.724465] usb 1-3.3: DVB extension successfully initialized
>
> Not sure how to address it.
>
> Regards,
> Mauro
>
> diff --git a/drivers/media/usb/em28xx/em28xx-cards.c b/drivers/media/usb/em28xx/em28xx-cards.c
> index b516c691b9eb..50e4c6e51ee7 100644
> --- a/drivers/media/usb/em28xx/em28xx-cards.c
> +++ b/drivers/media/usb/em28xx/em28xx-cards.c
> @@ -3236,8 +3236,7 @@ static int em28xx_init_dev(struct em28xx *dev, struct usb_device *udev,
>  			   int minor)
>  {
>  	int retval;
> -	static const char *default_chip_name = "em28xx";
> -	const char *chip_name = default_chip_name;
> +	const char *chip_name = NULL;
>
>  	dev->udev = udev;
>  	mutex_init(&dev->ctrl_urb_lock);
> @@ -3324,14 +3323,9 @@ static int em28xx_init_dev(struct em28xx *dev, struct usb_device *udev,
>  			break;
>  		}
>  	}
> -
> -	dev_set_name(&dev->udev->dev, "%d-%s: %s#%d",
> -		     dev->udev->bus->busnum, dev->udev->devpath,
> -		     chip_name, dev->devno);
> -
> -	if (chip_name == default_chip_name)
> -			dev_info(&dev->udev->dev,
> -				 "unknown em28xx chip ID (%d)\n", dev->chip_id);
> +	if (!chip_name)
> +		dev_info(&dev->udev->dev,
> +			 "unknown em28xx chip ID (%d)\n", dev->chip_id);
>  	else
>  		dev_info(&dev->udev->dev, "chip ID is %s\n", chip_name);
>

I think you did something wrong now. There is usb interface pointer 
passed to probe() and you should always use device on that interface to 
print messages. Only that way it works properly. Looks like you now pass 
wrong device - i2c adapter device - to logging and due to that it prints 
messages wrong.

Add that line to probe() in order to see how it should work:
dev_info(&intf->dev, "Hello\n");

regards
Antti

-- 
http://palosaari.fi/

^ permalink raw reply	[flat|nested] 6+ messages in thread

* Re: em28xx broken 4.9.0-rc6+
  2016-12-07 15:04       ` Antti Palosaari
@ 2016-12-07 15:20         ` Mauro Carvalho Chehab
  0 siblings, 0 replies; 6+ messages in thread
From: Mauro Carvalho Chehab @ 2016-12-07 15:20 UTC (permalink / raw)
  To: Antti Palosaari; +Cc: LMML

Em Wed, 7 Dec 2016 17:04:07 +0200
Antti Palosaari <crope@iki.fi> escreveu:

> On 12/07/2016 04:55 PM, Mauro Carvalho Chehab wrote:
> > Em Wed, 7 Dec 2016 12:22:01 -0200
> > Mauro Carvalho Chehab <mchehab@s-opensource.com> escreveu:
> >  
> >> Em Tue, 6 Dec 2016 13:41:38 -0200
> >> Mauro Carvalho Chehab <mchehab@s-opensource.com> escreveu:
> >>  
> >>> Em Tue, 6 Dec 2016 01:06:17 +0200
> >>> Antti Palosaari <crope@iki.fi> escreveu:
> >>>  
> >>>> Hello Mauro
> >>>> I just noticed current em28xx driver seem to be broken. When I plug
> >>>> device first time it loads correctly, but when I re-plug it, it does not
> >>>> work anymore but yells a lot of noise to message log. Tested with PCTV
> >>>> 290e and 292e both same. Other USB DVB devices are working so it is very
> >>>> likely em28xx driver bug.
> >>>>
> >>>> Easy to reproduce:
> >>>> plug device
> >>>> unplug device
> >>>> plug device  
> >>>
> >>>
> >>> Are you referring to those:
> >>>
> >>> [ 1010.310320] WARNING: CPU: 3 PID: 119 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x7b/0x90
> >>> [ 1010.310323] sysfs: cannot create duplicate filename '/bus/usb/devices/1-3.3'
> >>> [ 1010.310325] Modules linked in: lgdt330x em28xx_dvb dvb_core em28xx_alsa tuner_xc2028 tuner tvp5150 em28xx_v4l videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core em28xx tveeprom v4l2_common videodev media xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp tun bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter ip_tables x_tables cmac bnep cpufreq_powersave cpufreq_conservative cpufreq_userspace binfmt_misc parport_pc ppdev lp parport snd_hda_codec_hdmi iTCO_wdt snd_hda_codec_realtek iTCO_vendor_support snd_hda_codec_generic arc4 intel_rapl x86_pkg_temp_thermal iwlmvm intel_powerclamp coretemp kvm_intel mac80211 kvm i915
> >>> [ 1010.310383]  irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel iwlwifi pl2303 aesni_intel btusb aes_x86_64 usbserial lrw btrtl gf128mul glue_helper btbcm ablk_helper cryptd btintel bluetooth drm_kms_helper cfg80211 drm psmouse pcspkr i2c_i801 e1000e serio_raw snd_hda_intel snd_soc_rt5640 snd_hda_codec snd_soc_rl6231 snd_soc_ssm4567 mei_me i2c_smbus rfkill snd_hda_core ptp mei snd_soc_core ehci_pci sg lpc_ich shpchp mfd_core ehci_hcd pps_core snd_hwdep i2c_algo_bit snd_compress snd_pcm sdhci_acpi snd_timer battery snd sdhci elan_i2c snd_soc_sst_acpi mmc_core fjes dw_dmac i2c_hid soundcore snd_soc_sst_match i2c_designware_platform video i2c_designware_core acpi_pad acpi_als kfifo_buf tpm_tis button industrialio tpm_tis_core tpm ext4 crc16 jbd2 fscrypto mbcache dm_mod joydev evdev hid_logitech_hidpp
> >>> [ 1010.310449]  sd_mod hid_logitech_dj usbhid hid ahci libahci crc32c_intel libata xhci_pci xhci_hcd scsi_mod usbcore fan thermal
> >>> [ 1010.310464] CPU: 3 PID: 119 Comm: kworker/3:2 Not tainted 4.9.0-rc8+ #14
> >>> [ 1010.310466] Hardware name:                  /NUC5i7RYB, BIOS RYBDWi35.86A.0350.2015.0812.1722 08/12/2015
> >>> [ 1010.310487] Workqueue: usb_hub_wq hub_event [usbcore]
> >>> [ 1010.310490]  0000000000000000 ffffffff848f56c5 ffff8803b1f7f858 0000000000000000
> >>> [ 1010.310496]  ffffffff8414f8f8 ffff88030000001f ffffed00763eff07 ffff8803b1f7f8f0
> >>> [ 1010.310501]  ffff8803b3ea1e60 0000000000000001 ffffffffffffffef ffff8803b45c6840
> >>> [ 1010.310505] Call Trace:
> >>> [ 1010.310517]  [<ffffffff848f56c5>] ? dump_stack+0x5c/0x77
> >>> [ 1010.310522]  [<ffffffff8414f8f8>] ? __warn+0x168/0x1a0
> >>> [ 1010.310526]  [<ffffffff8414f9e4>] ? warn_slowpath_fmt+0xb4/0xf0
> >>> [ 1010.310529]  [<ffffffff8414f930>] ? __warn+0x1a0/0x1a0
> >>> [ 1010.310534]  [<ffffffff845436c6>] ? kasan_kmalloc+0xa6/0xd0
> >>> [ 1010.310539]  [<ffffffff846ec2fa>] ? kernfs_path_from_node+0x4a/0x60
> >>> [ 1010.310543]  [<ffffffff846f66eb>] ? sysfs_warn_dup+0x7b/0x90
> >>> [ 1010.310547]  [<ffffffff846f6f26>] ? sysfs_do_create_link_sd.isra.2+0xb6/0xd0
> >>> [ 1010.310553]  [<ffffffff84cd5a08>] ? bus_add_device+0x318/0x6b0
> >>> [ 1010.310557]  [<ffffffff846f8693>] ? sysfs_create_groups+0x83/0x110
> >>> [ 1010.310562]  [<ffffffff84ccff87>] ? device_add+0x777/0x1350
> >>> [ 1010.310567]  [<ffffffff84ccf810>] ? device_private_init+0x180/0x180
> >>> [ 1010.310583]  [<ffffffffc00c0f77>] ? usb_new_device+0x707/0x1030 [usbcore]
> >>> [ 1010.310598]  [<ffffffffc00c58c5>] ? hub_event+0x1d65/0x3280 [usbcore]
> >>> [ 1010.310604]  [<ffffffff841eb4ab>] ? account_entity_dequeue+0x30b/0x4a0
> >>> [ 1010.310618]  [<ffffffffc00c3b60>] ? hub_port_debounce+0x280/0x280 [usbcore]
> >>> [ 1010.310624]  [<ffffffff8407ccd0>] ? compat_start_thread+0x80/0x80
> >>> [ 1010.310629]  [<ffffffff851f5cb4>] ? __schedule+0x704/0x1770
> >>> [ 1010.310633]  [<ffffffff851f55b0>] ? io_schedule_timeout+0x390/0x390
> >>> [ 1010.310638]  [<ffffffff84541783>] ? cache_reap+0x173/0x200
> >>> [ 1010.310642]  [<ffffffff84197bed>] ? process_one_work+0x4ed/0xe60
> >>> [ 1010.310646]  [<ffffffff84198642>] ? worker_thread+0xe2/0xfd0
> >>> [ 1010.310650]  [<ffffffff8421f76c>] ? __wake_up_common+0xbc/0x160
> >>> [ 1010.310654]  [<ffffffff84198560>] ? process_one_work+0xe60/0xe60
> >>> [ 1010.310658]  [<ffffffff841a837c>] ? kthread+0x1cc/0x220
> >>> [ 1010.310663]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
> >>> [ 1010.310667]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
> >>> [ 1010.310671]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
> >>> [ 1010.310675]  [<ffffffff852016f5>] ? ret_from_fork+0x25/0x30
> >>> [ 1010.310698] ---[ end trace 49b46eb633ff1197 ]---
> >>> [ 1010.311298] usb 1-3.3: can't device_add, error -17
> >>> [ 1010.390703] usb 1-3.3: new high-speed USB device number 9 using xhci_hcd
> >>> [ 1010.496337] usb 1-3.3: New USB device found, idVendor=2040, idProduct=6513
> >>> [ 1010.496343] usb 1-3.3: New USB device strings: Mfr=0, Product=1, SerialNumber=2
> >>> [ 1010.496345] usb 1-3.3: Product: WinTV HVR-980
> >>> [ 1010.496347] usb 1-3.3: SerialNumber: 4028449018
> >>> [ 1010.497259] ------------[ cut here ]------------
> >>> [ 1010.497264] WARNING: CPU: 3 PID: 119 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x7b/0x90
> >>> [ 1010.497266] sysfs: cannot create duplicate filename '/bus/usb/devices/1-3.3'
> >>> [ 1010.497267] Modules linked in: lgdt330x em28xx_dvb dvb_core em28xx_alsa tuner_xc2028 tuner tvp5150 em28xx_v4l videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core em28xx tveeprom v4l2_common videodev media xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp tun bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter ip_tables x_tables cmac bnep cpufreq_powersave cpufreq_conservative cpufreq_userspace binfmt_misc parport_pc ppdev lp parport snd_hda_codec_hdmi iTCO_wdt snd_hda_codec_realtek iTCO_vendor_support snd_hda_codec_generic arc4 intel_rapl x86_pkg_temp_thermal iwlmvm intel_powerclamp coretemp kvm_intel mac80211 kvm i915
> >>> [ 1010.497307]  irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel iwlwifi pl2303 aesni_intel btusb aes_x86_64 usbserial lrw btrtl gf128mul glue_helper btbcm ablk_helper cryptd btintel bluetooth drm_kms_helper cfg80211 drm psmouse pcspkr i2c_i801 e1000e serio_raw snd_hda_intel snd_soc_rt5640 snd_hda_codec snd_soc_rl6231 snd_soc_ssm4567 mei_me i2c_smbus rfkill snd_hda_core ptp mei snd_soc_core ehci_pci sg lpc_ich shpchp mfd_core ehci_hcd pps_core snd_hwdep i2c_algo_bit snd_compress snd_pcm sdhci_acpi snd_timer battery snd sdhci elan_i2c snd_soc_sst_acpi mmc_core fjes dw_dmac i2c_hid soundcore snd_soc_sst_match i2c_designware_platform video i2c_designware_core acpi_pad acpi_als kfifo_buf tpm_tis button industrialio tpm_tis_core tpm ext4 crc16 jbd2 fscrypto mbcache dm_mod joydev evdev hid_logitech_hidpp
> >>> [ 1010.497352]  sd_mod hid_logitech_dj usbhid hid ahci libahci crc32c_intel libata xhci_pci xhci_hcd scsi_mod usbcore fan thermal
> >>> [ 1010.497362] CPU: 3 PID: 119 Comm: kworker/3:2 Tainted: G        W       4.9.0-rc8+ #14
> >>> [ 1010.497363] Hardware name:                  /NUC5i7RYB, BIOS RYBDWi35.86A.0350.2015.0812.1722 08/12/2015
> >>> [ 1010.497377] Workqueue: usb_hub_wq hub_event [usbcore]
> >>> [ 1010.497379]  0000000000000000 ffffffff848f56c5 ffff8803b1f7f858 0000000000000000
> >>> [ 1010.497382]  ffffffff8414f8f8 ffff88030000001f ffffed00763eff07 ffff8803b1f7f8f0
> >>> [ 1010.497385]  ffff8803b3ea1e60 0000000000000001 ffffffffffffffef ffff8803b45c6840
> >>> [ 1010.497387] Call Trace:
> >>> [ 1010.497395]  [<ffffffff848f56c5>] ? dump_stack+0x5c/0x77
> >>> [ 1010.497398]  [<ffffffff8414f8f8>] ? __warn+0x168/0x1a0
> >>> [ 1010.497400]  [<ffffffff8414f9e4>] ? warn_slowpath_fmt+0xb4/0xf0
> >>> [ 1010.497402]  [<ffffffff8414f930>] ? __warn+0x1a0/0x1a0
> >>> [ 1010.497405]  [<ffffffff845436c6>] ? kasan_kmalloc+0xa6/0xd0
> >>> [ 1010.497408]  [<ffffffff846ec2fa>] ? kernfs_path_from_node+0x4a/0x60
> >>> [ 1010.497410]  [<ffffffff846f66eb>] ? sysfs_warn_dup+0x7b/0x90
> >>> [ 1010.497412]  [<ffffffff846f6f26>] ? sysfs_do_create_link_sd.isra.2+0xb6/0xd0
> >>> [ 1010.497416]  [<ffffffff84cd5a08>] ? bus_add_device+0x318/0x6b0
> >>> [ 1010.497419]  [<ffffffff846f8693>] ? sysfs_create_groups+0x83/0x110
> >>> [ 1010.497421]  [<ffffffff84ccff87>] ? device_add+0x777/0x1350
> >>> [ 1010.497424]  [<ffffffff84ccf810>] ? device_private_init+0x180/0x180
> >>> [ 1010.497433]  [<ffffffffc00c0f77>] ? usb_new_device+0x707/0x1030 [usbcore]
> >>> [ 1010.497441]  [<ffffffffc00c58c5>] ? hub_event+0x1d65/0x3280 [usbcore]
> >>> [ 1010.497445]  [<ffffffff841eb4ab>] ? account_entity_dequeue+0x30b/0x4a0
> >>> [ 1010.497454]  [<ffffffffc00c3b60>] ? hub_port_debounce+0x280/0x280 [usbcore]
> >>> [ 1010.497457]  [<ffffffff8407ccd0>] ? compat_start_thread+0x80/0x80
> >>> [ 1010.497460]  [<ffffffff851f5cb4>] ? __schedule+0x704/0x1770
> >>> [ 1010.497462]  [<ffffffff851f55b0>] ? io_schedule_timeout+0x390/0x390
> >>> [ 1010.497465]  [<ffffffff84541783>] ? cache_reap+0x173/0x200
> >>> [ 1010.497468]  [<ffffffff84197bed>] ? process_one_work+0x4ed/0xe60
> >>> [ 1010.497470]  [<ffffffff84198642>] ? worker_thread+0xe2/0xfd0
> >>> [ 1010.497473]  [<ffffffff8421f76c>] ? __wake_up_common+0xbc/0x160
> >>> [ 1010.497475]  [<ffffffff84198560>] ? process_one_work+0xe60/0xe60
> >>> [ 1010.497477]  [<ffffffff841a837c>] ? kthread+0x1cc/0x220
> >>> [ 1010.497480]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
> >>> [ 1010.497482]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
> >>> [ 1010.497485]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
> >>> [ 1010.497487]  [<ffffffff852016f5>] ? ret_from_fork+0x25/0x30
> >>> [ 1010.497489] ---[ end trace 49b46eb633ff1198 ]---
> >>> [ 1010.497829] usb 1-3.3: can't device_add, error -17
> >>> [ 1010.578707] usb 1-3.3: new high-speed USB device number 10 using xhci_hcd
> >>> [ 1010.604448] usb 1-3.3: New USB device found, idVendor=2040, idProduct=6513
> >>> [ 1010.604452] usb 1-3.3: New USB device strings: Mfr=0, Product=1, SerialNumber=2
> >>> [ 1010.604454] usb 1-3.3: Product: WinTV HVR-980
> >>> [ 1010.604456] usb 1-3.3: SerialNumber: 4028449018
> >>> [ 1010.605369] ------------[ cut here ]------------
> >>> [ 1010.605374] WARNING: CPU: 3 PID: 119 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x7b/0x90
> >>> [ 1010.605375] sysfs: cannot create duplicate filename '/bus/usb/devices/1-3.3'
> >>> [ 1010.605376] Modules linked in: lgdt330x em28xx_dvb dvb_core em28xx_alsa tuner_xc2028 tuner tvp5150 em28xx_v4l videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core em28xx tveeprom v4l2_common videodev media xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp tun bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter ip_tables x_tables cmac bnep cpufreq_powersave cpufreq_conservative cpufreq_userspace binfmt_misc parport_pc ppdev lp parport snd_hda_codec_hdmi iTCO_wdt snd_hda_codec_realtek iTCO_vendor_support snd_hda_codec_generic arc4 intel_rapl x86_pkg_temp_thermal iwlmvm intel_powerclamp coretemp kvm_intel mac80211 kvm i915
> >>> [ 1010.605415]  irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel iwlwifi pl2303 aesni_intel btusb aes_x86_64 usbserial lrw btrtl gf128mul glue_helper btbcm ablk_helper cryptd btintel bluetooth drm_kms_helper cfg80211 drm psmouse pcspkr i2c_i801 e1000e serio_raw snd_hda_intel snd_soc_rt5640 snd_hda_codec snd_soc_rl6231 snd_soc_ssm4567 mei_me i2c_smbus rfkill snd_hda_core ptp mei snd_soc_core ehci_pci sg lpc_ich shpchp mfd_core ehci_hcd pps_core snd_hwdep i2c_algo_bit snd_compress snd_pcm sdhci_acpi snd_timer battery snd sdhci elan_i2c snd_soc_sst_acpi mmc_core fjes dw_dmac i2c_hid soundcore snd_soc_sst_match i2c_designware_platform video i2c_designware_core acpi_pad acpi_als kfifo_buf tpm_tis button industrialio tpm_tis_core tpm ext4 crc16 jbd2 fscrypto mbcache dm_mod joydev evdev hid_logitech_hidpp
> >>> [ 1010.605459]  sd_mod hid_logitech_dj usbhid hid ahci libahci crc32c_intel libata xhci_pci xhci_hcd scsi_mod usbcore fan thermal
> >>> [ 1010.605469] CPU: 3 PID: 119 Comm: kworker/3:2 Tainted: G        W       4.9.0-rc8+ #14
> >>> [ 1010.605471] Hardware name:                  /NUC5i7RYB, BIOS RYBDWi35.86A.0350.2015.0812.1722 08/12/2015
> >>> [ 1010.605484] Workqueue: usb_hub_wq hub_event [usbcore]
> >>> [ 1010.605486]  0000000000000000 ffffffff848f56c5 ffff8803b1f7f858 0000000000000000
> >>> [ 1010.605490]  ffffffff8414f8f8 ffff88030000001f ffffed00763eff07 ffff8803b1f7f8f0
> >>> [ 1010.605492]  ffff8803b3ea1e60 0000000000000001 ffffffffffffffef ffff8803b45c6840
> >>> [ 1010.605495] Call Trace:
> >>> [ 1010.605502]  [<ffffffff848f56c5>] ? dump_stack+0x5c/0x77
> >>> [ 1010.605505]  [<ffffffff8414f8f8>] ? __warn+0x168/0x1a0
> >>> [ 1010.605508]  [<ffffffff8414f9e4>] ? warn_slowpath_fmt+0xb4/0xf0
> >>> [ 1010.605510]  [<ffffffff8414f930>] ? __warn+0x1a0/0x1a0
> >>> [ 1010.605513]  [<ffffffff845436c6>] ? kasan_kmalloc+0xa6/0xd0
> >>> [ 1010.605516]  [<ffffffff846ec2fa>] ? kernfs_path_from_node+0x4a/0x60
> >>> [ 1010.605518]  [<ffffffff846f66eb>] ? sysfs_warn_dup+0x7b/0x90
> >>> [ 1010.605520]  [<ffffffff846f6f26>] ? sysfs_do_create_link_sd.isra.2+0xb6/0xd0
> >>> [ 1010.605524]  [<ffffffff84cd5a08>] ? bus_add_device+0x318/0x6b0
> >>> [ 1010.605527]  [<ffffffff846f8693>] ? sysfs_create_groups+0x83/0x110
> >>> [ 1010.605529]  [<ffffffff84ccff87>] ? device_add+0x777/0x1350
> >>> [ 1010.605532]  [<ffffffff84ccf810>] ? device_private_init+0x180/0x180
> >>> [ 1010.605542]  [<ffffffffc00c0f77>] ? usb_new_device+0x707/0x1030 [usbcore]
> >>> [ 1010.605550]  [<ffffffffc00c58c5>] ? hub_event+0x1d65/0x3280 [usbcore]
> >>> [ 1010.605554]  [<ffffffff841eb4ab>] ? account_entity_dequeue+0x30b/0x4a0
> >>> [ 1010.605563]  [<ffffffffc00c3b60>] ? hub_port_debounce+0x280/0x280 [usbcore]
> >>> [ 1010.605566]  [<ffffffff8407ccd0>] ? compat_start_thread+0x80/0x80
> >>> [ 1010.605569]  [<ffffffff851f5cb4>] ? __schedule+0x704/0x1770
> >>> [ 1010.605572]  [<ffffffff851f55b0>] ? io_schedule_timeout+0x390/0x390
> >>> [ 1010.605574]  [<ffffffff84541783>] ? cache_reap+0x173/0x200
> >>> [ 1010.605577]  [<ffffffff84197bed>] ? process_one_work+0x4ed/0xe60
> >>> [ 1010.605579]  [<ffffffff84198642>] ? worker_thread+0xe2/0xfd0
> >>> [ 1010.605581]  [<ffffffff8421f76c>] ? __wake_up_common+0xbc/0x160
> >>> [ 1010.605584]  [<ffffffff84198560>] ? process_one_work+0xe60/0xe60
> >>> [ 1010.605586]  [<ffffffff841a837c>] ? kthread+0x1cc/0x220
> >>> [ 1010.605589]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
> >>> [ 1010.605591]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
> >>> [ 1010.605594]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
> >>> [ 1010.605596]  [<ffffffff852016f5>] ? ret_from_fork+0x25/0x30
> >>> [ 1010.605598] ---[ end trace 49b46eb633ff1199 ]---
> >>> [ 1010.605948] usb 1-3.3: can't device_add, error -17
> >>> [ 1010.686729] usb 1-3.3: new high-speed USB device number 11 using xhci_hcd
> >>> [ 1010.712761] usb 1-3.3: New USB device found, idVendor=2040, idProduct=6513
> >>> [ 1010.712768] usb 1-3.3: New USB device strings: Mfr=0, Product=1, SerialNumber=2
> >>> [ 1010.712772] usb 1-3.3: Product: WinTV HVR-980
> >>> [ 1010.712775] usb 1-3.3: SerialNumber: 4028449018
> >>> [ 1010.714339] ------------[ cut here ]------------
> >>> [ 1010.714347] WARNING: CPU: 3 PID: 119 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x7b/0x90
> >>> [ 1010.714349] sysfs: cannot create duplicate filename '/bus/usb/devices/1-3.3'
> >>> [ 1010.714351] Modules linked in: lgdt330x em28xx_dvb dvb_core em28xx_alsa tuner_xc2028 tuner tvp5150 em28xx_v4l videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core em28xx tveeprom v4l2_common videodev media xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp tun bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter ip_tables x_tables cmac bnep cpufreq_powersave cpufreq_conservative cpufreq_userspace binfmt_misc parport_pc ppdev lp parport snd_hda_codec_hdmi iTCO_wdt snd_hda_codec_realtek iTCO_vendor_support snd_hda_codec_generic arc4 intel_rapl x86_pkg_temp_thermal iwlmvm intel_powerclamp coretemp kvm_intel mac80211 kvm i915
> >>> [ 1010.714409]  irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel iwlwifi pl2303 aesni_intel btusb aes_x86_64 usbserial lrw btrtl gf128mul glue_helper btbcm ablk_helper cryptd btintel bluetooth drm_kms_helper cfg80211 drm psmouse pcspkr i2c_i801 e1000e serio_raw snd_hda_intel snd_soc_rt5640 snd_hda_codec snd_soc_rl6231 snd_soc_ssm4567 mei_me i2c_smbus rfkill snd_hda_core ptp mei snd_soc_core ehci_pci sg lpc_ich shpchp mfd_core ehci_hcd pps_core snd_hwdep i2c_algo_bit snd_compress snd_pcm sdhci_acpi snd_timer battery snd sdhci elan_i2c snd_soc_sst_acpi mmc_core fjes dw_dmac i2c_hid soundcore snd_soc_sst_match i2c_designware_platform video i2c_designware_core acpi_pad acpi_als kfifo_buf tpm_tis button industrialio tpm_tis_core tpm ext4 crc16 jbd2 fscrypto mbcache dm_mod joydev evdev hid_logitech_hidpp
> >>> [ 1010.714475]  sd_mod hid_logitech_dj usbhid hid ahci libahci crc32c_intel libata xhci_pci xhci_hcd scsi_mod usbcore fan thermal
> >>> [ 1010.714490] CPU: 3 PID: 119 Comm: kworker/3:2 Tainted: G        W       4.9.0-rc8+ #14
> >>> [ 1010.714493] Hardware name:                  /NUC5i7RYB, BIOS RYBDWi35.86A.0350.2015.0812.1722 08/12/2015
> >>> [ 1010.714513] Workqueue: usb_hub_wq hub_event [usbcore]
> >>> [ 1010.714517]  0000000000000000 ffffffff848f56c5 ffff8803b1f7f858 0000000000000000
> >>> [ 1010.714522]  ffffffff8414f8f8 ffff88030000001f ffffed00763eff07 ffff8803b1f7f8f0
> >>> [ 1010.714527]  ffff8803b3ea1e60 0000000000000001 ffffffffffffffef ffff8803b45c6840
> >>> [ 1010.714532] Call Trace:
> >>> [ 1010.714543]  [<ffffffff848f56c5>] ? dump_stack+0x5c/0x77
> >>> [ 1010.714547]  [<ffffffff8414f8f8>] ? __warn+0x168/0x1a0
> >>> [ 1010.714551]  [<ffffffff8414f9e4>] ? warn_slowpath_fmt+0xb4/0xf0
> >>> [ 1010.714555]  [<ffffffff8414f930>] ? __warn+0x1a0/0x1a0
> >>> [ 1010.714560]  [<ffffffff845436c6>] ? kasan_kmalloc+0xa6/0xd0
> >>> [ 1010.714565]  [<ffffffff846ec2fa>] ? kernfs_path_from_node+0x4a/0x60
> >>> [ 1010.714568]  [<ffffffff846f66eb>] ? sysfs_warn_dup+0x7b/0x90
> >>> [ 1010.714573]  [<ffffffff846f6f26>] ? sysfs_do_create_link_sd.isra.2+0xb6/0xd0
> >>> [ 1010.714579]  [<ffffffff84cd5a08>] ? bus_add_device+0x318/0x6b0
> >>> [ 1010.714583]  [<ffffffff846f8693>] ? sysfs_create_groups+0x83/0x110
> >>> [ 1010.714587]  [<ffffffff84ccff87>] ? device_add+0x777/0x1350
> >>> [ 1010.714592]  [<ffffffff84ccf810>] ? device_private_init+0x180/0x180
> >>> [ 1010.714608]  [<ffffffffc00c0f77>] ? usb_new_device+0x707/0x1030 [usbcore]
> >>> [ 1010.714623]  [<ffffffffc00c58c5>] ? hub_event+0x1d65/0x3280 [usbcore]
> >>> [ 1010.714628]  [<ffffffff841eb4ab>] ? account_entity_dequeue+0x30b/0x4a0
> >>> [ 1010.714643]  [<ffffffffc00c3b60>] ? hub_port_debounce+0x280/0x280 [usbcore]
> >>> [ 1010.714648]  [<ffffffff8407ccd0>] ? compat_start_thread+0x80/0x80
> >>> [ 1010.714653]  [<ffffffff851f5cb4>] ? __schedule+0x704/0x1770
> >>> [ 1010.714657]  [<ffffffff851f55b0>] ? io_schedule_timeout+0x390/0x390
> >>> [ 1010.714661]  [<ffffffff84541783>] ? cache_reap+0x173/0x200
> >>> [ 1010.714666]  [<ffffffff84197bed>] ? process_one_work+0x4ed/0xe60
> >>> [ 1010.714670]  [<ffffffff84198642>] ? worker_thread+0xe2/0xfd0
> >>> [ 1010.714674]  [<ffffffff8421f76c>] ? __wake_up_common+0xbc/0x160
> >>> [ 1010.714678]  [<ffffffff84198560>] ? process_one_work+0xe60/0xe60
> >>> [ 1010.714682]  [<ffffffff841a837c>] ? kthread+0x1cc/0x220
> >>> [ 1010.714686]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
> >>> [ 1010.714691]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
> >>> [ 1010.714695]  [<ffffffff841a81b0>] ? kthread_park+0x80/0x80
> >>> [ 1010.714699]  [<ffffffff852016f5>] ? ret_from_fork+0x25/0x30
> >>> [ 1010.714719] ---[ end trace 49b46eb633ff119a ]---
> >>> [ 1010.715706] usb 1-3.3: can't device_add, error -17
> >>> [ 1010.716223] usb 1-3-port3: unable to enumerate USB device
> >>>
> >>>
> >>>
> >>> If so, it seems that the device was not properly unregistered. That's
> >>> weird, since everything sounded ok at device unregister:
> >>>
> >>> [  999.740335] usb 1-3.3: em2882!3#0: USB disconnect, device number 7
> >>> [  999.742857] usb 1-3.3: em2882!3#0: Disconnecting
> >>> [  999.742874] usb 1-3.3: em2882!3#0: Closing video extension
> >>> [  999.743058] usb 1-3.3: em2882!3#0: V4L2 device vbi0 deregistered
> >>> [  999.744327] usb 1-3.3: em2882!3#0: V4L2 device video0 deregistered
> >>> [  999.747938] tvp5150 6-005c: tvp5150.c: removing tvp5150 adapter on address 0xb8
> >>> [  999.750085] xc2028 6-0061: xc2028_dvb_release called
> >>> [  999.750852] usb 1-3.3: em2882!3#0: Closing audio extension
> >>> [  999.754253] usb 1-3.3: em2882!3#0: Closing DVB extension
> >>> [  999.760360] xc2028 6-0061: xc2028_dvb_release called
> >>> [  999.760362] xc2028 6-0061: free_firmware called
> >>> [  999.760958] xc2028 6-0061: destroying instance
> >>>
> >>> I'll try to bisect this.  
> >>
> >> According with git bisect, the culprit is this patch:
> >>
> >> ce8591ff023ef8e04750c2cc2882523619a80b58 is the first bad commit
> >> commit ce8591ff023ef8e04750c2cc2882523619a80b58
> >> Author: Mauro Carvalho Chehab <mchehab@s-opensource.com>
> >> Date:   Thu Oct 20 08:42:03 2016 -0200
> >>
> >>     [media] em28xx: convert it from pr_foo() to dev_foo()
> >>
> >>     Instead of using pr_foo(), use dev_foo(), with provides a
> >>     better output. As this device is a multi-interface one,
> >>     we'll set the device name to show the chipset and the driver
> >>     used.
> >>
> >>     While here, get rid of printk continuation messages.
> >>
> >>     Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
> >>
> >> :040000 040000 834f13194c879d17f2b2ca79afbd1ed0999fbfeb 85ea8360d7adbf597ca1d6c5a8205b1a64666879 M	drivers
> >>
> >> I'll do more tests and see what's wrong there.  
> >
> > I found the issue: driver's core doesn't like changing the device name,
> > as it breaks the unbind logic. The enclosed patch fixes it.
> >
> > There's a drawback, though: it will now print log messages using the USB
> > address, instead of using "em28xx:":
> >
> > [  132.398622] usb 1-3.3: new high-speed USB device number 9 using xhci_hcd
> > [  132.504308] usb 1-3.3: New USB device found, idVendor=2040, idProduct=6513
> > [  132.504314] usb 1-3.3: New USB device strings: Mfr=0, Product=1, SerialNumber=2
> > [  132.504316] usb 1-3.3: Product: WinTV HVR-980
> > [  132.504318] usb 1-3.3: SerialNumber: 4028449018
> > [  132.507651] usb 1-3.3: New device  WinTV HVR-980 @ 480 Mbps (2040:6513, interface 0, class 0)
> > [  132.507654] usb 1-3.3: Audio interface 0 found (Vendor Class)
> > [  132.507657] usb 1-3.3: Video interface 0 found: isoc
> > [  132.507658] usb 1-3.3: DVB interface 0 found: isoc
> > [  132.507777] usb 1-3.3: chip ID is em2882/3
> > [  132.708925] usb 1-3.3: EEPROM ID = 1a eb 67 95, EEPROM hash = 0x994b2bdd
> > [  132.708928] usb 1-3.3: EEPROM info:
> > [  132.708931] usb 1-3.3: 	AC97 audio (5 sample rates)
> > [  132.708932] usb 1-3.3: 	500mA max power
> > [  132.708935] usb 1-3.3: 	Table at offset 0x24, strings=0x1e82, 0x186a, 0x0000
> > [  132.708937] usb 1-3.3: Identified as Hauppauge WinTV HVR 950 (card=16)
> > [  132.710934] usb 1-3.3: analog set to isoc mode.
> > [  132.710936] usb 1-3.3: dvb set to isoc mode.
> > [  132.711582] usb 1-3.3: Registering V4L2 extension
> > [  132.858224] usb 1-3.3: Config register raw data: 0xd0
> > [  132.859738] usb 1-3.3: AC97 vendor ID = 0xffffffff
> > [  132.859918] usb 1-3.3: AC97 features = 0x6a90
> > [  132.859920] usb 1-3.3: Empia 202 AC97 audio processor detected
> > [  134.636310] usb 1-3.3: V4L2 video device registered as video0
> > [  134.636319] usb 1-3.3: V4L2 VBI device registered as vbi0
> > [  134.637132] usb 1-3.3: V4L2 extension successfully initialized
> > [  134.637138] usb 1-3.3: Binding audio extension
> > [  134.637142] usb 1-3.3: em28xx-audio.c: Copyright (C) 2006 Markus Rechberger
> > [  134.637147] usb 1-3.3: em28xx-audio.c: Copyright (C) 2007-2016 Mauro Carvalho Chehab
> > [  134.638521] usb 1-3.3: Endpoint 0x83 high-speed on intf 0 alt 7 interval = 8, size 196
> > [  134.638529] usb 1-3.3: Number of URBs: 1, with 64 packets and 192 size
> > [  134.643544] usb 1-3.3: Audio extension successfully initialized
> > [  134.643552] usb 1-3.3: Binding DVB extension
> > [  134.719239] usb 1-3.3: xc3028 attached
> > [  134.719256] usb 1-3.3: DVB: registering adapter 0 frontend 0 (LG Electronics LGDT3303 VSB/QAM Frontend)...
> > [  134.724465] usb 1-3.3: DVB extension successfully initialized
> >
> > Not sure how to address it.
> >
> > Regards,
> > Mauro
> >
> > diff --git a/drivers/media/usb/em28xx/em28xx-cards.c b/drivers/media/usb/em28xx/em28xx-cards.c
> > index b516c691b9eb..50e4c6e51ee7 100644
> > --- a/drivers/media/usb/em28xx/em28xx-cards.c
> > +++ b/drivers/media/usb/em28xx/em28xx-cards.c
> > @@ -3236,8 +3236,7 @@ static int em28xx_init_dev(struct em28xx *dev, struct usb_device *udev,
> >  			   int minor)
> >  {
> >  	int retval;
> > -	static const char *default_chip_name = "em28xx";
> > -	const char *chip_name = default_chip_name;
> > +	const char *chip_name = NULL;
> >
> >  	dev->udev = udev;
> >  	mutex_init(&dev->ctrl_urb_lock);
> > @@ -3324,14 +3323,9 @@ static int em28xx_init_dev(struct em28xx *dev, struct usb_device *udev,
> >  			break;
> >  		}
> >  	}
> > -
> > -	dev_set_name(&dev->udev->dev, "%d-%s: %s#%d",
> > -		     dev->udev->bus->busnum, dev->udev->devpath,
> > -		     chip_name, dev->devno);
> > -
> > -	if (chip_name == default_chip_name)
> > -			dev_info(&dev->udev->dev,
> > -				 "unknown em28xx chip ID (%d)\n", dev->chip_id);
> > +	if (!chip_name)
> > +		dev_info(&dev->udev->dev,
> > +			 "unknown em28xx chip ID (%d)\n", dev->chip_id);
> >  	else
> >  		dev_info(&dev->udev->dev, "chip ID is %s\n", chip_name);
> >  
> 
> I think you did something wrong now. There is usb interface pointer 
> passed to probe() and you should always use device on that interface to 
> print messages. Only that way it works properly. Looks like you now pass 
> wrong device - i2c adapter device - to logging and due to that it prints 
> messages wrong.
> 
> Add that line to probe() in order to see how it should work:
> dev_info(&intf->dev, "Hello\n");

Yeah, using &interface->dev makes it do the right print at _probe
function:

[ 1362.444533] em28xx 1-3.3:1.0: New device  WinTV HVR-980 @ 480 Mbps (2040:6513, interface 0, class 0)
[ 1362.444540] em28xx 1-3.3:1.0: Audio interface 0 found (Vendor Class)
[ 1362.444544] em28xx 1-3.3:1.0: Video interface 0 found: isoc
[ 1362.444547] em28xx 1-3.3:1.0: DVB interface 0 found: isoc
[ 1362.650781] em28xx 1-3.3:1.0: analog set to isoc mode.
[ 1362.650783] em28xx 1-3.3:1.0: dvb set to isoc mode.

However, we don't store it at the em28xx struct. I'll see if I found
a way to go from udev to intf without needing to store it.

Thanks,
Mauro

^ permalink raw reply	[flat|nested] 6+ messages in thread

end of thread, other threads:[~2016-12-07 15:20 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2016-12-05 23:06 em28xx broken 4.9.0-rc6+ Antti Palosaari
2016-12-06 15:41 ` Mauro Carvalho Chehab
2016-12-07 14:22   ` Mauro Carvalho Chehab
2016-12-07 14:55     ` Mauro Carvalho Chehab
2016-12-07 15:04       ` Antti Palosaari
2016-12-07 15:20         ` Mauro Carvalho Chehab

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