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Commit 48785bb9 authored by Jens Axboe's avatar Jens Axboe
Browse files

[PATCH] __blk_rq_unmap_user() fails to return error 



If the bio is user copied, the copy back could return -EFAULT. Make
sure we return any error seen during unmapping.

Signed-off-by: default avatarJens Axboe <jens.axboe@oracle.com>
parent 9c9381f9

block/ll_rw_blk.c

+7 −2
Original line number Diff line number Diff line
@@ -2504,6 +2504,7 @@ EXPORT_SYMBOL(blk_rq_map_user_iov); 
int blk_rq_unmap_user(struct request *rq)

{

	struct bio *bio, *mapped_bio;

	int ret = 0, ret2;



	while ((bio = rq->bio)) {

		if (bio_flagged(bio, BIO_BOUNCED))
@@ -2511,11 +2512,15 @@ int blk_rq_unmap_user(struct request *rq) 
		else

			mapped_bio = bio;



		__blk_rq_unmap_user(mapped_bio);

		ret2 = __blk_rq_unmap_user(mapped_bio);

		if (ret2 && !ret)

			ret = ret2;



		rq->bio = bio->bi_next;

		bio_put(bio);

	}

	return 0;



	return ret;

}



EXPORT_SYMBOL(blk_rq_unmap_user);