From: Pavel Roskin <proski@gnu.org>
To: ath9k-devel@lists.ath9k.org
Subject: [ath9k-devel] AR5008 hanging computer
Date: Thu, 11 Mar 2010 02:56:55 -0500 [thread overview]
Message-ID: <1268294215.4089.10.camel@mj> (raw)
In-Reply-To: <20100305230438.GA4942@lazo.ca>
On Fri, 2010-03-05 at 15:04 -0800, Mark Sutton wrote:
> Is it possible this is a hardware issue?
It looks like a hardware issue, but maybe it can be worked around.
> BUG: soft lockup - CPU#0 stuck for 61s! [phy0:604]
> Modules linked in: usbhid hid nvidia(P) acpi_cpufreq cpufreq_stats cpufreq_userspace cpufreq_ondemand cpufreq_powersave freq_table cpufreq_conservative lm90 adm1021 arc4 ecb snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm ath9k pcmcia snd_seq mac80211 snd_timer yenta_socket snd_seq_device ath fan rsrc_nonstatic uhci_hcd thermal cfg80211 video snd processor toshiba_acpi pcmcia_core ehci_hcd thermal_sys led_class rtc_cmos e100 soundcore rtc_core battery ac evdev hwmon mii rtc_lib output rfkill snd_page_alloc intel_agp usbcore psmouse agpgart button
>
> Pid: 604, comm: phy0 Tainted: P (2.6.32.7 #4) Portable PC
> EIP: 0060:[<c0294d02>] EFLAGS: 00000296 CPU: 0
> EIP is at ioread32+0x32/0x40
> EAX: 00000000 EBX: edc40000 ECX: f0c40000 EDX: f0c48258
> ESI: edc40000 EDI: 00001000 EBP: 00000000 ESP: ed899d24
> DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068
> CR0: 8005003b CR2: b7868000 CR3: 27fc7000 CR4: 000006d0
> DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
> DR6: ffff0ff0 DR7: 00000400
> Call Trace:
> [<f0bfc656>] ? ath9k_hw_procmibevent+0x36/0x140 [ath9k]
I believe the register number is in DX. Register 0x8258 is
AR_SLP_MIB_CTRL, and it's indeed being read in ath9k_hw_procmibevent().
Somehow reading that register causes a CPU lockup.
An easy workaround would be to comment out this line in ani.c:
if (!(REG_READ(ah, AR_SLP_MIB_CTRL) & AR_SLP_MIB_PENDING))
Leave the new line so that the register is cleared unconditionally.
--
Regards,
Pavel Roskin
next prev parent reply other threads:[~2010-03-11 7:56 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-18 20:31 [ath9k-devel] AR5008 hanging computer Mark Sutton
2010-02-18 21:58 ` Mark Sutton
2010-02-19 1:36 ` Pavel Roskin
2010-03-05 23:04 ` Mark Sutton
2010-03-11 7:56 ` Pavel Roskin [this message]
2010-03-11 10:38 ` Peter Stuge
2010-04-17 17:49 ` Tomi Orava
2010-02-21 8:31 ` Tomi Orava
2010-02-22 18:02 ` Luis R. Rodriguez
2010-02-22 18:24 ` Tomi Orava
2010-02-22 18:34 ` Luis R. Rodriguez
-- strict thread matches above, loose matches on Subject: below --
2010-02-12 15:25 James Grossmann
2010-02-12 22:53 ` Pavel Roskin
2010-02-12 23:35 ` James Grossmann
2010-02-12 23:42 ` hong zhang
2010-02-15 7:03 ` Pavel Roskin
[not found] ` <167ae39b1002152030s170128a0j362e7e9c61a4af42@mail.gmail.com>
[not found] ` <1266296860.17808.2.camel@mj>
2010-02-16 23:54 ` James Grossmann
2010-02-17 17:47 ` Pavel Roskin
2010-02-17 17:56 ` hong zhang
2010-02-17 18:15 ` Pavel Roskin
2010-02-23 6:45 ` James Grossmann
2010-02-23 7:02 ` James Grossmann
2010-03-11 8:01 ` Pavel Roskin
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