linux-kernel - Re: [1/3] 2.6.21-rc7: known regressions (v2)

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Message-ID: <20070424173547.0a3b5a03@localhost>
Date:	Tue, 24 Apr 2007 17:35:47 +0200
From:	Michal Čihař <michal@...ar.com>
To:	linux-kernel@...r.kernel.org
Subject: Re: [1/3] 2.6.21-rc7: known regressions (v2)

Hi

On Tue, 24 Apr 2007 08:26:00 -0700
michal@...ar.com wrote:

> Adrian Bunk napsal:
> > Subject    : gammu no longer works
> > References : http://lkml.org/lkml/2007/4/20/84
> > Submitter  : Wolfgang Erig <Wolfgang.Erig@....de>
> > Status     : unknown
> 
> As several people reported this issue to me, I debugged gammu and here
> are details: This is caused by setting fcntl(filehandle, F_SETFL,
> FASYNC). Consequent write(filehandle, ...) generate SIGIO, which end
> application. I'm still investigating why FASYNC was there and whether
> it is really needed, but it worked with it for ages (this code is
> there at least since 2004 where my VCS history ends).

Reply to myself... At the end it turned out that Gammu wrongly sets
async I/O while it doesn't want it and does not handle it. Till now no
driver which has been used didn't support it, so this issue has not been
caught. I just removed this code from Gammu, so this is IMHO not a
kernel regression.

PS: Please CC me on reply, I'm not subscribed.

-- 
	Michal Čihař | http://cihar.com | http://blog.cihar.com

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