[ath9k-devel] ath9k (AR9485) failing with PCI errors after hours of uptime with current ath9k.ko from linux-wireless

[Joel Diaz <joeldiaz@earthlink.net>]

On Wed, 2013-05-08 at 15:35 -0700, Adrian Chadd wrote:
> Step 0 - disable station mode power save; see if that has any impact.
> 
> 
The base station is an Apple Airport Extreme (version 7.6.3 in case that
matters). I don't see anything in the settings for power saving. And a
google search didn't help much.

Joel
> 
> adrian
> 
> 
> On 8 May 2013 14:41, Joel Diaz <joeldiaz@earthlink.net> wrote:
> > First some background: starting with Debian Wheezy I noticed my wireless
> > connection would fail after hours (sometime as quick as 15 minutes) of
> > uptime. Moving from Debian's 3.2 kernel to upstream's 3.9-RCs also
> > showed the problem.
> >
> > Yesterday I pulled the linux-wireless git repo and built myself a kernel
> > (starting with Debian Wheezy's kernel config) with HEAD pointing to:
> >
> > commit e514a9747148e3786879cc5430775a854441ba38
> > Author: Stanislaw Gruszka <sgruszka@redhat.com>
> > Date:   Thu May 2 09:43:57 2013 +0200
> >
> >     ath5k: do not reschedule tx_complete_work on stop
> >
> > After about 10 hours of uptime with the system basically idle (since I
> > was at work) I see the failure:
> >
> > [38951.779076] ath: phy0: received PCI FATAL interrupt
> > [38951.779081] ath: phy0: received PCI PERR interrupt
> > [38951.789851] ath: phy0: Failed to wakeup in 500us
> > [38951.789853] ------------[ cut here ]------------
> > [38951.789866] WARNING: at drivers/net/wireless/ath/ath9k/hw.c:2231
> > ath9k_hw_setpower+0x446/0x499 [ath9k_hw]()
> > [38951.789868] Hardware name: Inspiron One 2020
> > [38951.789870] Modules linked in: isofs udf crc_itu_t bnep rfcomm
> > binfmt_misc loop hid_generic usbhid hid ath3k btusb bluetooth
> > snd_hda_codec_realtek coretemp ehci_pci kvm_intel snd_hda_intel kvm
> > snd_hda_codec ehci_hcd arc4 snd_hwdep ath9k ath9k_common ath9k_hw ath
> > mac80211 usbcore i915 cfg80211 snd_pcm drm_kms_helper drm iTCO_wdt
> > iTCO_vendor_support snd_page_alloc i2c_algo_bit i2c_i801 i2c_core
> > snd_timer acpi_cpufreq mperf crc32c_intel ghash_clmulni_intel lpc_ich
> > mfd_core sparse_keymap rfkill evdev snd video dcdbas usb_common psmouse
> > cryptd wmi processor button soundcore pcspkr serio_raw microcode ext4
> > crc16 jbd2 mbcache sg sr_mod sd_mod cdrom crc_t10dif ata_generic thermal
> > fan thermal_sys ata_piix libata scsi_mod r8169 mii
> > [38951.789929] Pid: 0, comm: swapper/0 Not tainted 3.9.0ath9-wl+ #3
> > [38951.789931] Call Trace:
> > [38951.789933]  <IRQ>  [<ffffffff8103d500>] ? warn_slowpath_common
> > +0x76/0x8c
> > [38951.789946]  [<ffffffffa044e166>] ? ath9k_hw_setpower+0x446/0x499
> > [ath9k_hw]
> > [38951.789954]  [<ffffffffa0395b11>] ? ath9k_ps_wakeup+0x4c/0xa9 [ath9k]
> > [38951.789960]  [<ffffffffa0397374>] ? ath9k_tasklet+0x24/0x131 [ath9k]
> > [38951.789964]  [<ffffffff81044000>] ? tasklet_action+0x73/0xc2
> > [38951.789968]  [<ffffffff81043c61>] ? __do_softirq+0xe2/0x1f7
> > [38951.789971]  [<ffffffff81043e41>] ? irq_exit+0x3f/0x82
> > [38951.789975]  [<ffffffff8102c301>] ? __x2apic_send_IPI_mask+0xb9/0x140
> > [38951.789979]  [<ffffffff8100f701>] ? do_IRQ+0x81/0x97
> > [38951.789984]  [<ffffffff813856ed>] ? common_interrupt+0x6d/0x6d
> > [38951.789985]  <EOI>  [<ffffffff8129f3d8>] ? arch_local_irq_enable
> > +0x4/0x8
> > [38951.789994]  [<ffffffff8129fa5c>] ? cpuidle_wrap_enter+0x3c/0x71
> > [38951.789999]  [<ffffffff8129f78e>] ? cpuidle_enter_state+0xa/0x2f
> > [38951.790002]  [<ffffffff8129f85c>] ? cpuidle_idle_call+0xa9/0xfb
> > [38951.790007]  [<ffffffff81014c6f>] ? cpu_idle+0x9c/0xe6
> > [38951.790011]  [<ffffffff816aed23>] ? start_kernel+0x3b8/0x3c3
> > [38951.790014]  [<ffffffff816ae781>] ? repair_env_string+0x57/0x57
> > [38951.790018]  [<ffffffff816ae59c>] ? x86_64_start_kernel+0xf2/0xfd
> > [38951.790021] ---[ end trace bff1151979a9309c ]---
> > [38951.800533] ath: phy0: Failed to wakeup in 500us
> > [38951.865086] ath: phy0: Failed to stop TX DMA, queues=0x10f!
> > [38951.876459] ath: phy0: DMA failed to stop in 10 ms AR_CR=0xffffffff
> > AR_DIAG_SW=0xffffffff DMADBG_7=0xffffffff
> > [38951.876494] ath: phy0: Could not stop RX, we could be confusing the
> > DMA engine when we start RX up
> >
> > At this point the wireless connection is gone and can't be restored
> > without a full reboot.
> >
> > In the past while looking at this with the upstream RC kernels I tried
> > setting ath9k.debug=0xffffffff, but it didn't seem to add anything
> > useful ( https://bugzilla.kernel.org/show_bug.cgi?id=56301 ).
> >
> > Since the full kern.log is over 50 megs (lots of repeated error
> > messages) I'm only attaching the first 1000 lines which should be more
> > than enough.
> >
> > Not sure where to go from here since I'm using the most current ath9k
> > that I could find. Is there anything else I could do to help get to the
> > bottom of this issue?
> >
> > Joel
> >
> >
> >
> >
> >
> >
> >
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> >