linux-kernel - Re: [BUG] hang with ath5k

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Date:	Mon, 27 Oct 2008 16:34:40 +0800
From:	"Dave Young" <hidave.darkstar@...il.com>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	"Jiri Slaby" <jirislaby@...il.com>, ath5k-devel@...ts.ath5k.org,
	linux-wireless@...r.kernel.org,
	"kernel list" <linux-kernel@...r.kernel.org>
Subject: Re: [BUG] hang with ath5k

On Sat, Oct 25, 2008 at 6:40 AM, Rafael J. Wysocki <rjw@...k.pl> wrote:
> On Thursday, 16 of October 2008, Dave Young wrote:
>> On Wed, Oct 15, 2008 at 11:58 PM, Jiri Slaby <jirislaby@...il.com> wrote:
>> > On 10/14/2008 10:42 AM, Dave Young wrote:
>> >> 1) run wpa_supplicant
>> >> 2) ctrl + C
>> >> 3) goto 1)
>> >
>> > It doesn't happen here. How many iterations in average you need to reproduce this?
>> >
>>
>> About 15 times for me,
>> BTW, wpa_gui running while testing
>
> Is this a regression from 2.6.26?
>
> Rafael
>

Test with 2.6.28-rc2,  run
wpa_supplicant -i wlan0 -c /etc/wpa_supplicant.conf,
kernel warning triggered:

[ 1648.091084] ------------[ cut here ]------------
[ 1648.091090] WARNING: at net/mac80211/rx.c:2201
__ieee80211_rx+0x1d0/0x5f0 [mac80211]()
[ 1648.091094] Modules linked in: rfcomm l2cap bluetooth container
fuse ath5k mac80211 led_class psmouse serio_raw sg cfg80211 e100 mii
intel_agp agpgart thermal button processor thermal_sys evdev
[ 1648.091127] Pid: 0, comm: swapper Not tainted 2.6.28-rc1-smp #15
[ 1648.091130] Call Trace:
[ 1648.091140]  [<c01318a9>] warn_on_slowpath+0x59/0x80
[ 1648.091148]  [<c01a15a6>] ? check_bytes_and_report+0x26/0xd0
[ 1648.091155]  [<c03f2b06>] ? __kfree_skb+0x36/0x90
[ 1648.091160]  [<c0157bff>] ? validate_chain+0xbf/0xea0
[ 1648.091165]  [<c03f2b06>] ? __kfree_skb+0x36/0x90
[ 1648.091170]  [<c0158c8a>] ? __lock_acquire+0x2aa/0x9a0
[ 1648.091187]  [<e01b7640>] __ieee80211_rx+0x1d0/0x5f0 [mac80211]
[ 1648.091199]  [<e017a001>] ? ath5k_hw_get_tsf64+0x51/0x90 [ath5k]
[ 1648.091205]  [<c0476e0e>] ? _spin_lock+0x5e/0x70
[ 1648.091215]  [<e01815f8>] ath5k_tasklet_rx+0x2f8/0x6b0 [ath5k]
[ 1648.091221]  [<c0158c8a>] ? __lock_acquire+0x2aa/0x9a0
[ 1648.091227]  [<c0137173>] tasklet_action+0x53/0xd0
[ 1648.091232]  [<c01368e7>] __do_softirq+0xa7/0x170
[ 1648.091237]  [<c0136a15>] do_softirq+0x65/0x70
[ 1648.091242]  [<c0136eb7>] irq_exit+0x77/0x90
[ 1648.091247]  [<c0106756>] do_IRQ+0x96/0xc0
[ 1648.091252]  [<c0104a0c>] common_interrupt+0x28/0x30
[ 1648.091258]  [<c015007b>] ? timer_list_show+0x14b/0xd70
[ 1648.091263]  [<c010b0a2>] ? default_idle+0x42/0x60
[ 1648.091267]  [<c010279e>] cpu_idle+0x6e/0xc0
[ 1648.091272]  [<c04646f3>] rest_init+0x53/0x60
[ 1648.091276] ---[ end trace c0bb2248162783d9 ]---
[ 3856.835188] ------------[ cut here ]------------

-- 
Regards
dave
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