From: Jiri Slaby <jirislaby@gmail.com>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Peter Zijlstra <peterz@infradead.org>,
Christophe Lermytte <christophe.lermytte@thomson.net>,
linux-kernel@vger.kernel.org
Subject: Re: mutex_lock_slowpath warning using mxser tty driver (input/output error)
Date: Thu, 02 Apr 2009 22:23:57 +0200 [thread overview]
Message-ID: <49D51EDD.4060902@gmail.com> (raw)
In-Reply-To: <20090402194401.154bbc36@lxorguk.ukuu.org.uk>
On 04/02/2009 08:44 PM, Alan Cox wrote:
>> 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.
Yes, unreliable stack entries, but echo_set_canon_col is called from irq
context and locks mutex.
next prev parent reply other threads:[~2009-04-02 20:24 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
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 [this message]
2009-04-02 22:55 ` Alan Cox
2009-04-03 0:33 ` Johannes Weiner
2009-04-21 12:20 ` Jiri Slaby
-- strict thread matches above, loose matches on Subject: below --
2009-04-02 21:37 Christophe Lermytte
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