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Date: Mon, 11 Nov 2002 20:13:40 -0800
From: Andrew Morton <akpm@digeo.com>
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To: Andrew McGregor <andrew@indranet.co.nz>, jt@hpl.hp.com,
       Thomas Molina <tmolina@cox.net>
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Subject: Re: [BUG] Oopsen with pcmcia aironet wireless (2.5.47)
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Andrew McGregor wrote:
> 
> I see lots of oopsen when I insert an Aironet PC4800 802.11 card.

They are debug warnings, not oopses.

> ...
> Nov 12 15:40:39 localhost kernel: end_request: I/O error, dev hdb, sector 0
> Nov 12 15:40:39 localhost last message repeated 3 times
> Nov 12 15:40:39 localhost kernel: end_request: I/O error, dev hdc, sector 0
> Nov 12 15:40:39 localhost last message repeated 2 times

hm.  IDE sick?

> Nov 12 15:40:39 localhost kernel: Debug: sleeping function called from
> illegal context at include/asm/semaphore.h:145
> Nov 12 15:40:39 localhost kernel: Call Trace:
> Nov 12 15:40:39 localhost kernel:  [<e1a59215>] PC4500_readrid+0x55/0x160

airo_get_stats is called under the read_lock(&dev_base_lock); which was
taken in dev_get_info.  So it may not call sleeping functions (ie:
down_interruptible()).

It would appear that no netdevice->get_stats() method is allowed to sleep,
which seems pretty dumb, IMVHO.
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