Subject: Re: mutex_lock_slowpath warning using mxser tty driver
 (input/output error)
From: Christophe Lermytte <christophe@lermytte.be>
To: linux-kernel@vger.kernel.org
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Date: Thu, 02 Apr 2009 23:37:27 +0200
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> > It appears to want to lock a mutex in interrupt context, something
> > that's a definite no-no.
> > 
> > CCed the folks who might know a thing or two about the driver.

> Moxa is not a USB driver so the USB trace at the end makes no sense at
> all.

Well, it's not that I faked the traces ;-)

During the first cat, I can see the data transmitted by the device, so I guess the kernel warning is not really blocking for me at this point. 

What is blocking, is the fact that I can only do it once, before I get the input/output error. I found a post about this ( http://lkml.org/lkml/2009/3/24/269 ) and the patch seems to have made it into 2.6.29. Still having a similar issue though...


Regards,
Christophe L.


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