tree 7394a785edeeb5caec8bf065f5e02b44c9878d4e
parent 871dd9286e25330c8a581e5dacfa8b1dfe1dd641
author Gu Zheng <guz.fnst@cn.fujitsu.com> 1367261752 -0700
committer Jens Axboe <axboe@kernel.dk> 1367263470 +0200

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>