From: Christophe Lermytte <christophe@lermytte.be>
To: linux-kernel@vger.kernel.org
Subject: Re: mutex_lock_slowpath warning using mxser tty driver (input/output error)
Date: Thu, 02 Apr 2009 23:37:27 +0200 [thread overview]
Message-ID: <1238708247.5211.14.camel@cabrera> (raw)
> > 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.
next reply other threads:[~2009-04-02 21:43 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-02 21:37 Christophe Lermytte [this message]
-- strict thread matches above, loose matches on Subject: below --
2009-04-02 16:26 mutex_lock_slowpath warning using mxser tty driver (input/output error) Christophe Lermytte
2009-04-02 18:19 ` Peter Zijlstra
2009-04-02 18:44 ` Alan Cox
2009-04-02 20:23 ` Jiri Slaby
2009-04-02 22:55 ` Alan Cox
2009-04-03 0:33 ` Johannes Weiner
2009-04-21 12:20 ` Jiri Slaby
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