netdev - Re: N_PPP_SYNC ldisc BUG: sleeping function called from invalid context

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Message-ID: <4AC3BF62.9020706@gmail.com>
Date:	Wed, 30 Sep 2009 22:28:18 +0200
From:	Jarek Poplawski <jarkao2@...il.com>
To:	Tilman Schmidt <tilman@...p.cc>
CC:	Alan Cox <alan@...rguk.ukuu.org.uk>, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org, Alan Cox <alan@...ux.intel.com>
Subject: Re: N_PPP_SYNC ldisc BUG: sleeping function called from invalid context

Tilman Schmidt wrote, On 09/30/2009 08:55 PM:

> Alan Cox schrieb:
>>>  [<c026d39b>] tty_unthrottle+0x10/0x38
>>>  [<f8dcc31f>] ppp_sync_receive+0x168/0x170 [ppp_synctty]
>>>  [<f8fbb9ce>] handle_minor_recv+0x187/0x1cd [capi]
>>>  [<f8fbc19b>] capi_recv_message+0x1d9/0x24e [capi]
>> Really need to see the rest of the call trace to be sure
> 
> There wasn't more than what I posted. I had six of them, they looked all
> identical, and all of them ended after the kernel_thread_helper line. 
...
> Why then does mutex_lock() complain?


Maybe it doesn't matter here, but this: 

> INFO: lockdep is turned off.
suggests there was some lockdep issue/warning earlier.


Jarek P.
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