* WARNING from tty driver in 3.9-rc0
@ 2013-02-26 21:25 Larry Finger
2013-02-26 21:56 ` Daniel Mack
0 siblings, 1 reply; 6+ messages in thread
From: Larry Finger @ 2013-02-26 21:25 UTC (permalink / raw)
To: Greg Kroah-Hartman, Jiri Slaby; +Cc: LKML
Hi,
With v3.8-8693-gbf722a0 from the mainline repo, I get the following warning
because the pointer for tty is NULL:
[ 34.956862] WARNING: at drivers/tty/tty_buffer.c:428 flush_to_ldisc+0x1bb/0x1c0()
[ 34.956865] Hardware name: HP Pavilion dv2700 Notebook PC
[ 34.956867] tty is NULL
[ 34.956869] Modules linked in: arc4 b43 mac80211 cfg80211
snd_hda_codec_conexant snd_hda_intel rfkill snd_hda_codec ipv6 snd_pcm kvm_amd
snd_seq kvm bcma rng_core snd_timer snd_seq_device ssb mmc_core snd pcmcia
sr_mod cdrom sg soundcore forcedeth pcmcia_core snd_page_alloc i2c_nforce2
i2c_core k8temp hwmon ehci_pci battery ac serio_raw joydev video wmi button
autofs4 ext4 mbcache jbd2 crc16 ohci_hcd ehci_hcd usbcore usb_common thermal
processor scsi_dh_alua scsi_dh_hp_sw scsi_dh_rdac scsi_dh_emc scsi_dh
ata_generic pata_acpi pata_amd
[ 34.956936] Pid: 270, comm: kworker/1:1 Not tainted 3.8.0+ #92
[ 34.956939] Call Trace:
[ 34.956944] [<ffffffff812acc00>] ? flush_to_ldisc+0x120/0x1c0
[ 34.956951] [<ffffffff81040a4a>] warn_slowpath_common+0x7a/0xc0
[ 34.956955] [<ffffffff81040b31>] warn_slowpath_fmt+0x41/0x50
[ 34.956959] [<ffffffff812acc9b>] flush_to_ldisc+0x1bb/0x1c0
[ 34.956964] [<ffffffff810640f1>] process_one_work+0x1f1/0x660
[ 34.956968] [<ffffffff81064085>] ? process_one_work+0x185/0x660
[ 34.956972] [<ffffffff81064900>] worker_thread+0x110/0x380
[ 34.956978] [<ffffffff810a5b7d>] ? trace_hardirqs_on+0xd/0x10
[ 34.956982] [<ffffffff810647f0>] ? rescuer_thread+0x250/0x250
[ 34.956987] [<ffffffff81069e96>] kthread+0xd6/0xe0
[ 34.956992] [<ffffffff81424c9b>] ? _raw_spin_unlock_irq+0x2b/0x50
[ 34.956997] [<ffffffff81069dc0>] ? __init_kthread_worker+0x70/0x70
[ 34.957002] [<ffffffff81425a7c>] ret_from_fork+0x7c/0xb0
[ 34.957006] [<ffffffff81069dc0>] ? __init_kthread_worker+0x70/0x70
[ 34.957009] ---[ end trace f467d4f2302660c1 ]---
[ 35.585060] forcedeth 0000:00:0a.0: irq 42 for MSI/MSI-X
[ 35.585182] forcedeth 0000:00:0a.0 eth0: MSI enabled
[ 36.140711] ------------[ cut here ]------------
I have not yet bisected this problem yet; however, I can if requested. Being
lazy, I hope that someone already has a patch, or can see the problem by
inspection. :)
Thanks.
Larry
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: WARNING from tty driver in 3.9-rc0
2013-02-26 21:25 WARNING from tty driver in 3.9-rc0 Larry Finger
@ 2013-02-26 21:56 ` Daniel Mack
2013-02-27 21:19 ` Jiri Slaby
0 siblings, 1 reply; 6+ messages in thread
From: Daniel Mack @ 2013-02-26 21:56 UTC (permalink / raw)
To: Larry Finger; +Cc: Greg Kroah-Hartman, Jiri Slaby, LKML
On Tue, Feb 26, 2013 at 10:25 PM, Larry Finger
<Larry.Finger@lwfinger.net> wrote:
> Hi,
>
> With v3.8-8693-gbf722a0 from the mainline repo, I get the following warning
> because the pointer for tty is NULL:
>
> [ 34.956862] WARNING: at drivers/tty/tty_buffer.c:428
> flush_to_ldisc+0x1bb/0x1c0()
> [ 34.956865] Hardware name: HP Pavilion dv2700 Notebook PC
> [ 34.956867] tty is NULL
> [ 34.956869] Modules linked in: arc4 b43 mac80211 cfg80211
> snd_hda_codec_conexant snd_hda_intel rfkill snd_hda_codec ipv6 snd_pcm
> kvm_amd snd_seq kvm bcma rng_core snd_timer snd_seq_device ssb mmc_core snd
> pcmcia sr_mod cdrom sg soundcore forcedeth pcmcia_core snd_page_alloc
> i2c_nforce2 i2c_core k8temp hwmon ehci_pci battery ac serio_raw joydev video
> wmi button autofs4 ext4 mbcache jbd2 crc16 ohci_hcd ehci_hcd usbcore
> usb_common thermal processor scsi_dh_alua scsi_dh_hp_sw scsi_dh_rdac
> scsi_dh_emc scsi_dh ata_generic pata_acpi pata_amd
> [ 34.956936] Pid: 270, comm: kworker/1:1 Not tainted 3.8.0+ #92
> [ 34.956939] Call Trace:
> [ 34.956944] [<ffffffff812acc00>] ? flush_to_ldisc+0x120/0x1c0
> [ 34.956951] [<ffffffff81040a4a>] warn_slowpath_common+0x7a/0xc0
> [ 34.956955] [<ffffffff81040b31>] warn_slowpath_fmt+0x41/0x50
> [ 34.956959] [<ffffffff812acc9b>] flush_to_ldisc+0x1bb/0x1c0
> [ 34.956964] [<ffffffff810640f1>] process_one_work+0x1f1/0x660
> [ 34.956968] [<ffffffff81064085>] ? process_one_work+0x185/0x660
> [ 34.956972] [<ffffffff81064900>] worker_thread+0x110/0x380
> [ 34.956978] [<ffffffff810a5b7d>] ? trace_hardirqs_on+0xd/0x10
> [ 34.956982] [<ffffffff810647f0>] ? rescuer_thread+0x250/0x250
> [ 34.956987] [<ffffffff81069e96>] kthread+0xd6/0xe0
> [ 34.956992] [<ffffffff81424c9b>] ? _raw_spin_unlock_irq+0x2b/0x50
> [ 34.956997] [<ffffffff81069dc0>] ? __init_kthread_worker+0x70/0x70
> [ 34.957002] [<ffffffff81425a7c>] ret_from_fork+0x7c/0xb0
> [ 34.957006] [<ffffffff81069dc0>] ? __init_kthread_worker+0x70/0x70
> [ 34.957009] ---[ end trace f467d4f2302660c1 ]---
> [ 35.585060] forcedeth 0000:00:0a.0: irq 42 for MSI/MSI-X
> [ 35.585182] forcedeth 0000:00:0a.0 eth0: MSI enabled
> [ 36.140711] ------------[ cut here ]------------
>
>
> I have not yet bisected this problem yet; however, I can if requested. Being
> lazy, I hope that someone already has a patch, or can see the problem by
> inspection. :)
FWIW, I see the same on an ARM embedded board ...
Daniel
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: WARNING from tty driver in 3.9-rc0
2013-02-26 21:56 ` Daniel Mack
@ 2013-02-27 21:19 ` Jiri Slaby
2013-02-27 21:25 ` Larry Finger
0 siblings, 1 reply; 6+ messages in thread
From: Jiri Slaby @ 2013-02-27 21:19 UTC (permalink / raw)
To: Daniel Mack, Larry Finger; +Cc: Greg Kroah-Hartman, LKML, Peter Hurley
On 02/26/2013 10:56 PM, Daniel Mack wrote:
> On Tue, Feb 26, 2013 at 10:25 PM, Larry Finger
> <Larry.Finger@lwfinger.net> wrote:
>> Hi,
>>
>> With v3.8-8693-gbf722a0 from the mainline repo, I get the following warning
>> because the pointer for tty is NULL:
>>
>> [ 34.956862] WARNING: at drivers/tty/tty_buffer.c:428
>> flush_to_ldisc+0x1bb/0x1c0()
>> [ 34.956865] Hardware name: HP Pavilion dv2700 Notebook PC
>> [ 34.956867] tty is NULL
>> [ 34.956869] Modules linked in: arc4 b43 mac80211 cfg80211
>> snd_hda_codec_conexant snd_hda_intel rfkill snd_hda_codec ipv6 snd_pcm
>> kvm_amd snd_seq kvm bcma rng_core snd_timer snd_seq_device ssb mmc_core snd
>> pcmcia sr_mod cdrom sg soundcore forcedeth pcmcia_core snd_page_alloc
>> i2c_nforce2 i2c_core k8temp hwmon ehci_pci battery ac serio_raw joydev video
>> wmi button autofs4 ext4 mbcache jbd2 crc16 ohci_hcd ehci_hcd usbcore
>> usb_common thermal processor scsi_dh_alua scsi_dh_hp_sw scsi_dh_rdac
>> scsi_dh_emc scsi_dh ata_generic pata_acpi pata_amd
>> [ 34.956936] Pid: 270, comm: kworker/1:1 Not tainted 3.8.0+ #92
>> [ 34.956939] Call Trace:
>> [ 34.956944] [<ffffffff812acc00>] ? flush_to_ldisc+0x120/0x1c0
>> [ 34.956951] [<ffffffff81040a4a>] warn_slowpath_common+0x7a/0xc0
>> [ 34.956955] [<ffffffff81040b31>] warn_slowpath_fmt+0x41/0x50
>> [ 34.956959] [<ffffffff812acc9b>] flush_to_ldisc+0x1bb/0x1c0
>> [ 34.956964] [<ffffffff810640f1>] process_one_work+0x1f1/0x660
>> [ 34.956968] [<ffffffff81064085>] ? process_one_work+0x185/0x660
>> [ 34.956972] [<ffffffff81064900>] worker_thread+0x110/0x380
>> [ 34.956978] [<ffffffff810a5b7d>] ? trace_hardirqs_on+0xd/0x10
>> [ 34.956982] [<ffffffff810647f0>] ? rescuer_thread+0x250/0x250
>> [ 34.956987] [<ffffffff81069e96>] kthread+0xd6/0xe0
>> [ 34.956992] [<ffffffff81424c9b>] ? _raw_spin_unlock_irq+0x2b/0x50
>> [ 34.956997] [<ffffffff81069dc0>] ? __init_kthread_worker+0x70/0x70
>> [ 34.957002] [<ffffffff81425a7c>] ret_from_fork+0x7c/0xb0
>> [ 34.957006] [<ffffffff81069dc0>] ? __init_kthread_worker+0x70/0x70
>> [ 34.957009] ---[ end trace f467d4f2302660c1 ]---
>> [ 35.585060] forcedeth 0000:00:0a.0: irq 42 for MSI/MSI-X
>> [ 35.585182] forcedeth 0000:00:0a.0 eth0: MSI enabled
>> [ 36.140711] ------------[ cut here ]------------
>>
>>
>> I have not yet bisected this problem yet; however, I can if requested. Being
>> lazy, I hope that someone already has a patch, or can see the problem by
>> inspection. :)
>
> FWIW, I see the same on an ARM embedded board ...
This one should be solved by Peter's "ldisc patchset". It didn't make it
to 3.9 though. Anyway, the warning was added for debugging purposes only
and it's apparently time to disable it now.
thanks,
--
js
suse labs
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: WARNING from tty driver in 3.9-rc0
2013-02-27 21:19 ` Jiri Slaby
@ 2013-02-27 21:25 ` Larry Finger
2013-02-28 10:07 ` Jiri Slaby
0 siblings, 1 reply; 6+ messages in thread
From: Larry Finger @ 2013-02-27 21:25 UTC (permalink / raw)
To: Jiri Slaby; +Cc: Daniel Mack, Greg Kroah-Hartman, LKML, Peter Hurley
On 02/27/2013 03:19 PM, Jiri Slaby wrote:
> On 02/26/2013 10:56 PM, Daniel Mack wrote:
>> On Tue, Feb 26, 2013 at 10:25 PM, Larry Finger
>> <Larry.Finger@lwfinger.net> wrote:
>>> Hi,
>>>
>>> With v3.8-8693-gbf722a0 from the mainline repo, I get the following warning
>>> because the pointer for tty is NULL:
>>>
>>> [ 34.956862] WARNING: at drivers/tty/tty_buffer.c:428
>>> flush_to_ldisc+0x1bb/0x1c0()
>>> [ 34.956865] Hardware name: HP Pavilion dv2700 Notebook PC
>>> [ 34.956867] tty is NULL
>>> [ 34.956869] Modules linked in: arc4 b43 mac80211 cfg80211
>>> snd_hda_codec_conexant snd_hda_intel rfkill snd_hda_codec ipv6 snd_pcm
>>> kvm_amd snd_seq kvm bcma rng_core snd_timer snd_seq_device ssb mmc_core snd
>>> pcmcia sr_mod cdrom sg soundcore forcedeth pcmcia_core snd_page_alloc
>>> i2c_nforce2 i2c_core k8temp hwmon ehci_pci battery ac serio_raw joydev video
>>> wmi button autofs4 ext4 mbcache jbd2 crc16 ohci_hcd ehci_hcd usbcore
>>> usb_common thermal processor scsi_dh_alua scsi_dh_hp_sw scsi_dh_rdac
>>> scsi_dh_emc scsi_dh ata_generic pata_acpi pata_amd
>>> [ 34.956936] Pid: 270, comm: kworker/1:1 Not tainted 3.8.0+ #92
>>> [ 34.956939] Call Trace:
>>> [ 34.956944] [<ffffffff812acc00>] ? flush_to_ldisc+0x120/0x1c0
>>> [ 34.956951] [<ffffffff81040a4a>] warn_slowpath_common+0x7a/0xc0
>>> [ 34.956955] [<ffffffff81040b31>] warn_slowpath_fmt+0x41/0x50
>>> [ 34.956959] [<ffffffff812acc9b>] flush_to_ldisc+0x1bb/0x1c0
>>> [ 34.956964] [<ffffffff810640f1>] process_one_work+0x1f1/0x660
>>> [ 34.956968] [<ffffffff81064085>] ? process_one_work+0x185/0x660
>>> [ 34.956972] [<ffffffff81064900>] worker_thread+0x110/0x380
>>> [ 34.956978] [<ffffffff810a5b7d>] ? trace_hardirqs_on+0xd/0x10
>>> [ 34.956982] [<ffffffff810647f0>] ? rescuer_thread+0x250/0x250
>>> [ 34.956987] [<ffffffff81069e96>] kthread+0xd6/0xe0
>>> [ 34.956992] [<ffffffff81424c9b>] ? _raw_spin_unlock_irq+0x2b/0x50
>>> [ 34.956997] [<ffffffff81069dc0>] ? __init_kthread_worker+0x70/0x70
>>> [ 34.957002] [<ffffffff81425a7c>] ret_from_fork+0x7c/0xb0
>>> [ 34.957006] [<ffffffff81069dc0>] ? __init_kthread_worker+0x70/0x70
>>> [ 34.957009] ---[ end trace f467d4f2302660c1 ]---
>>> [ 35.585060] forcedeth 0000:00:0a.0: irq 42 for MSI/MSI-X
>>> [ 35.585182] forcedeth 0000:00:0a.0 eth0: MSI enabled
>>> [ 36.140711] ------------[ cut here ]------------
>>>
>>>
>>> I have not yet bisected this problem yet; however, I can if requested. Being
>>> lazy, I hope that someone already has a patch, or can see the problem by
>>> inspection. :)
>>
>> FWIW, I see the same on an ARM embedded board ...
>
> This one should be solved by Peter's "ldisc patchset". It didn't make it
> to 3.9 though. Anyway, the warning was added for debugging purposes only
> and it's apparently time to disable it now.
Jiri,
Thanks for looking into this. Will you be pushing a 3.9 patch to disable the
warning?
Larry
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: WARNING from tty driver in 3.9-rc0
@ 2013-02-27 22:15 Sedat Dilek
0 siblings, 0 replies; 6+ messages in thread
From: Sedat Dilek @ 2013-02-27 22:15 UTC (permalink / raw)
To: Larry Finger; +Cc: LKML, linux-serial
Your original posting in [1].
Possible patch see [2].
- Sedat -
[1] http://lkml.org/lkml/2013/2/26/373
[2] http://marc.info/?l=linux-kernel&m=136200065728801&w=2
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2013-02-28 10:07 UTC | newest]
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2013-02-26 21:25 WARNING from tty driver in 3.9-rc0 Larry Finger
2013-02-26 21:56 ` Daniel Mack
2013-02-27 21:19 ` Jiri Slaby
2013-02-27 21:25 ` Larry Finger
2013-02-28 10:07 ` Jiri Slaby
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2013-02-27 22:15 Sedat Dilek
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