From: Andrew Morton <akpm@osdl.org>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: rmk+lkml@arm.linux.org.uk, e9925248@student.tuwien.ac.at,
linux-kernel@vger.kernel.org
Subject: Re: Deadlock in serial driver 2.6.x
Date: Mon, 31 Jan 2005 00:48:57 -0800 [thread overview]
Message-ID: <20050131004857.07f5e2c4.akpm@osdl.org> (raw)
In-Reply-To: <1107157019.14847.64.camel@localhost.localdomain>
Alan Cox <alan@lxorguk.ukuu.org.uk> wrote:
>
> On Sul, 2005-01-30 at 16:48, Russell King wrote:
> > Unsolvable as the tty layer currently stands. tty needs to not call back
> > into serial drivers when they supply read characters from their interrupt
> > functions.
>
> The tty layer cannot fix this for now, and I don't intend to fix it. Fix
> the serial driver: the fix is quite simple since you can keep a field in
> the driver for now to detect recursive calling into the echo case and
> don't relock.
Are we sure that the serial driver is the only one which will hit this
deadlock?
next prev parent reply other threads:[~2005-01-31 8:49 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-01-26 13:20 Deadlock in serial driver 2.6.x Martin Kögler
2005-01-27 7:13 ` Andrew Morton
2005-01-30 15:39 ` Alan Cox
2005-01-30 16:48 ` Russell King
2005-01-31 7:37 ` Alan Cox
2005-01-31 8:48 ` Andrew Morton [this message]
2005-02-03 10:02 ` Alan Cox
2005-02-03 18:21 ` Andrew Morton
2005-02-04 11:07 ` Martin Kögler
2005-02-04 13:50 ` Paul Fulghum
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