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From: Holger Schurig <holgerschurig@gmail.com>
To: linux-wireless@vger.kernel.org
Subject: Re: [PATCH] libertas: cfg80211 support
Date: Wed, 3 Feb 2010 16:32:10 +0100
Cc: Samuel Ortiz <sameo@linux.intel.com>,
	Dan Williams <dcbw@redhat.com>
References: <20100202000934.GA19847@sortiz.org> <201002031031.22805.holgerschurig@gmail.com> <20100203120406.GA3498@sortiz.org>
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Hmm, there are also still some bugs lurking in the code. Just 

I had an application running that was pinging and showed the
signal level. Then I moved out-of-reach of the AP.
This happened:

libertas: PREP_CMD: command 0x001f failed: 1
libertas: PREP_CMD: command 0x001f failed: 1
libertas: PREP_CMD: command 0x001f failed: 1
libertas: PREP_CMD: command 0x001f failed: 1
libertas: PREP_CMD: command 0x001f failed: 1
libertas: PREP_CMD: command 0x001f failed: 1
libertas: PREP_CMD: command 0x001f failed: 1
libertas: PREP_CMD: command 0x001f failed: 1
libertas: PREP_CMD: command 0x001f failed: 1
libertas: PREP_CMD: command 0x001f failed: 1
libertas: command 0x001f timed out
libertas: requeueing command 0x001f due to timeout (#1)
libertas: command 0x001f timed out
libertas: requeueing command 0x001f due to timeout (#2)
libertas: command 0x001f timed out
libertas: requeueing command 0x001f due to timeout (#3)
------------[ cut here ]------------
WARNING: at net/sched/sch_generic.c:261 dev_watchdog+0x19c/0x290()
NETDEV WATCHDOG: wlan0 (libertas_cs): transmit queue 0 timed out
Modules linked in: libertas_cs libertas cfg80211 compat_firmware_class [last unloaded: cfg80211]
Backtrace:
[<c0029464>] (dump_backtrace+0x0/0x100) from [<c002957c>] (dump_stack+0x18/0x1c)
 r7:c0221e24 r6:c0170694 r5:c020aa78 r4:00000105
[<c0029564>] (dump_stack+0x0/0x1c) from [<c00353a8>] (warn_slowpath_common+0x4c/0x64)
[<c003535c>] (warn_slowpath_common+0x0/0x64) from [<c003540c>] (warn_slowpath_fmt+0x30/0x38)
 r7:00000000 r6:00000001 r5:00000001 r4:c3b4f800
[<c00353dc>] (warn_slowpath_fmt+0x0/0x38) from [<c0170694>] (dev_watchdog+0x19c/0x290)
 r3:c3b4f800 r2:c020aa38
[<c01704f8>] (dev_watchdog+0x0/0x290) from [<c003ea28>] (run_timer_softirq+0x190/0x1f0)
 r8:c0221ebc r7:c01704f8 r6:00000100 r5:c023c0e0 r4:c0220000
[<c003e898>] (run_timer_softirq+0x0/0x1f0) from [<c0039d94>] (__do_softirq+0x8c/0x140)
[<c0039d08>] (__do_softirq+0x0/0x140) from [<c003a0a4>] (irq_exit+0x40/0x88)
[<c003a064>] (irq_exit+0x0/0x88) from [<c0025070>] (asm_do_IRQ+0x70/0x84)
 r4:0000001a
[<c0025000>] (asm_do_IRQ+0x0/0x84) from [<c0025a84>] (__irq_svc+0x24/0xa0)
Exception stack(0xc0221f58 to 0xc0221fa0)
1f40:                                                       00000001 08eff847
1f60: 00000000 60000013 c0220000 c02388e4 c0018ca0 c0223dd4 a00178e0 69052d06
1f80: a0017878 c0221fac c0221fb0 c0221fa0 c00269e8 c00269f4 60000013 ffffffff
 r6:04000000 r5:f2d00000 r4:ffffffff
[<c00269c8>] (default_idle+0x0/0x30) from [<c0026a64>] (cpu_idle+0x6c/0xa8)
[<c00269f8>] (cpu_idle+0x0/0xa8) from [<c01b03c0>] (rest_init+0x58/0x6c)
 r4:c0249774
[<c01b0368>] (rest_init+0x0/0x6c) from [<c00088f0>] (start_kernel+0x220/0x27c)
[<c00086d0>] (start_kernel+0x0/0x27c) from [<a0008034>] (0xa0008034)
---[ end trace 54aeef8ca4684eee ]---
libertas: tx watch dog timeout
libertas: command 0x001f timed out
libertas: Excessive timeouts submitting command 0x001f
libertas: PREP_CMD: command 0x001f failed: -110