linux-kernel - Re: [PATCH 25/69] TTY: con3215, remove tasklet for tty

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Message-ID: <20120403054241.GA2700@osiris.boeblingen.de.ibm.com>
Date:	Tue, 3 Apr 2012 07:42:42 +0200
From:	Heiko Carstens <heiko.carstens@...ibm.com>
To:	Jiri Slaby <jslaby@...e.cz>
Cc:	gregkh@...uxfoundation.org, alan@...ux.intel.com,
	linux-kernel@...r.kernel.org, jirislaby@...il.com,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	linux390@...ibm.com, linux-s390@...r.kernel.org
Subject: Re: [PATCH 25/69] TTY: con3215, remove tasklet for tty_wakeup

On Mon, Apr 02, 2012 at 01:54:09PM +0200, Jiri Slaby wrote:
> tty_wakeup is safe to be called from all contexts. No need to schedule
> a tasklet for that. Let us call it directly like in other drivers.
> 
> And delete the tasklet completely.

Your patch actually reverts Martin's recent commit 656d912537
"[S390] 3215 deadlock with tty_wakeup".
I'm quite sure the reason for the deadlock still exists.
Unfortunately the commit doesn't contain the call chain that
led to fix.

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