From: Gu Zheng <guz.fnst@cn.fujitsu.com>
Date: Mon, 29 Apr 2013 18:55:52 +0000 (-0700)
Subject: fs/block_dev.c: fix iov_shorten() criteria in blkdev_aio_read()
X-Git-Tag: omap-for-v3.10/fixes-for-merge-window-part2~11^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6f8f5c260af67fed49fe14efc3ad1f69654c260e;p=pandora-kernel.git

fs/block_dev.c: fix iov_shorten() criteria in blkdev_aio_read()

blkdev_aio_read() test 'size' to see if it is equal or greater than the
target count we request(iocb->ki_left).  If so there is no need to call
iov_shorten() to reduce number of segments and the iovec's length.  So the
judgement should be changed to 'if (size < iocb->ki_left)' instead.

Signed-off-by: Jianpeng Ma <majianpeng@gmail.com>
Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

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