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Date: Sun, 28 Oct 2007 21:16:31 +0100
From: Jens Lang <jenslang@yahoo.de>
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To: linux-wireless@vger.kernel.org
Subject: bcm43xx: 100 % CPU load due to ksoftirqd
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Hi,

I recently bought a Compaq 6715s laptop with a Broadcom 4312 wifi chip.
Unfortunately it doesn't work with my Ubuntu Gutsy Gibbon.

When the module is loaded it constantly produces the error
bcm43xx_irq_xmit_error. The ksoftirqd uses 100 % of my CPU time. When I
remove the module from the kernel the computer freezes. Before that it
produced the following output:

Call Trace:
<IRQ> [<ffffffff8023b5b9>] __do_softirq+0x69/0xe0
[<ffffffff8020b01c>] call_softirq+0x1c/0x30
<EOI> [<ffffffff8023b3bb>] local_bh_enabl +0x5b/0xa0
[<ffffffff803ae47b>] lock_sock_nested+0xcb/0xe0
[...] sys_sendto+0x146/0x1b0
[...] sock_fasync+0x82/0x10a0
[...] sock_close+0x15/0x40
      __fput+0xc10x1e0
filp_close+0x54/0x90
sys_close+0x96/0xf0
system_call+0x7e/083

Code: 48 8b 2b 90 0f ba 08 01 19 c0 74 c7 fa 65 48 8b 04

RIP [<ffffffff8023b6a8<] tasklet_action+0x58/0xb0
 RSP <ffffffff805d7f68>

Unfortunately I cannot provide a patch but maybe this will help you
further improving the driver.


Jens