From 36ffc6c1c0e67acdacb53348350d0a37206dbadf Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Sat, 3 Jun 2017 09:38:00 +0200 Subject: [PATCH] block_dev: propagate bio_iov_iter_get_pages error in __blkdev_direct_IO Once we move the block layer to its own status code we'll still want to propagate the bio_iov_iter_get_pages, so restructure __blkdev_direct_IO to take ret into account when returning the errno. Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe --- fs/block_dev.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/fs/block_dev.c b/fs/block_dev.c index 519599dddd36..c1dc393ad6b9 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -334,7 +334,7 @@ __blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter, int nr_pages) bool is_read = (iov_iter_rw(iter) == READ), is_sync; loff_t pos = iocb->ki_pos; blk_qc_t qc = BLK_QC_T_NONE; - int ret; + int ret = 0; if ((pos | iov_iter_alignment(iter)) & (bdev_logical_block_size(bdev) - 1)) @@ -363,7 +363,7 @@ __blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter, int nr_pages) ret = bio_iov_iter_get_pages(bio, iter); if (unlikely(ret)) { - bio->bi_error = ret; + bio->bi_error = -EIO; bio_endio(bio); break; } @@ -412,7 +412,8 @@ __blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter, int nr_pages) } __set_current_state(TASK_RUNNING); - ret = dio->bio.bi_error; + if (!ret) + ret = dio->bio.bi_error; if (likely(!ret)) ret = dio->size;