In function blkdev_aio_read(), the judgement of 'size', if it is equal or greater than the target count we request(iocb->ki_left), 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 <[email protected]> Signed-off-by: Gu Zheng <[email protected]> --- 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 aae187a..f0328f1 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -1559,7 +1559,7 @@ 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); } -- 1.7.7 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
