linux-kernel - Fix timeouts in sys

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Message-ID: <496D0448.7030508@t-online.de>
Date:	Tue, 13 Jan 2009 22:14:48 +0100
From:	Bernd Schmidt <bernds_cb1@...nline.de>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
CC:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	stable@...nel.org
Subject: Fix timeouts in sys_pselect7

Since we (Analog Devices) updated our Blackfin kernel to 2.6.28, we've
seen occasional 5-second hangs from telnet.  telnetd calls select with a
NULL timeout, but with the new kernel, the system call occasionally
returns 0, which causes telnet to call sleep (5).  This did not happen
with earlier kernels.

The code in sys_pselect7 looks a bit strange, in particular the variable
"to" is initialized to NULL, then changed if a non-null timeout was
passed in, but not used further.  It needs to be passed to
core_sys_select instead of &end_time.

Signed-off-by: Bernd Schmidt <bernd.schmidt@...log.com>
Reviewed-by: Ulrich Drepper <drepper@...hat.com>
Tested-by: Robin Getz <rgetz@...ckfin.uclinux.org>
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