From: Jens Axboe <jens.axboe@oracle.com>
Date: Wed, 20 Feb 2008 09:34:51 +0000 (+0100)
Subject: splice: only return -EAGAIN if there's hope of more data
X-Git-Tag: v2.6.25-rc4~98^2~15
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=02cf01aea5af7a4d1a38045712fe11bffcc206b0;p=pandora-kernel.git

splice: only return -EAGAIN if there's hope of more data

sys_tee() currently is a bit eager in returning -EAGAIN, it may do so
even if we don't have a chance of anymore data becoming available. So
improve the logic and only return -EAGAIN if we have an attached writer
to the input pipe.

Reported by Johann Felix Soden <johfel@gmx.de> and
Patrick McManus <mcmanus@ducksong.com>.

Tested-by: Johann Felix Soden <johfel@users.sourceforge.net>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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