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| author | Gu Zheng <guz.fnst@cn.fujitsu.com> | 2013-04-29 11:55:52 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2013-04-29 21:24:30 +0200 |
| commit | 6f8f5c260af67fed49fe14efc3ad1f69654c260e (patch) | |
| tree | 7394a785edeeb5caec8bf065f5e02b44c9878d4e | |
| parent | 871dd9286e25330c8a581e5dacfa8b1dfe1dd641 (diff) | |
| download | blackbird-obmc-linux-6f8f5c260af67fed49fe14efc3ad1f69654c260e.tar.gz blackbird-obmc-linux-6f8f5c260af67fed49fe14efc3ad1f69654c260e.zip | |
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>
| -rw-r--r-- | fs/block_dev.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/block_dev.c b/fs/block_dev.c index aea605c98ba6..dc7f9836fb5e 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -1558,7 +1558,7 @@ static ssize_t blkdev_aio_read(struct kiocb *iocb, const struct iovec *iov, return 0; size -= pos; - if (size < INT_MAX) + if (size < iocb->ki_left) nr_segs = iov_shorten((struct iovec *)iov, nr_segs, size); return generic_file_aio_read(iocb, iov, nr_segs, pos); } |
