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Commit 9599945b authored by Jens Axboe's avatar Jens Axboe
Browse files

Revert "blkdev: fix merge_bvec_fn return value checks" 



This reverts commit 9f7cdbc3.

It's causing oopses om dm setups, so revert it until we investigate.

Reported-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
Tested-by: default avatarSteven Rostedt <rostedt@goodmis.org>
Signed-off-by: default avatarJens Axboe <jens.axboe@oracle.com>
parent 13dda80e

fs/bio.c

+2 −2
Original line number Diff line number Diff line
@@ -555,7 +555,7 @@ static int __bio_add_page(struct request_queue *q, struct bio *bio, struct page 
					.bi_rw = bio->bi_rw,

				};



				if (q->merge_bvec_fn(q, &bvm, prev) != prev->bv_len) {

				if (q->merge_bvec_fn(q, &bvm, prev) < len) {

					prev->bv_len -= len;

					return 0;

				}
@@ -608,7 +608,7 @@ static int __bio_add_page(struct request_queue *q, struct bio *bio, struct page 
		 * merge_bvec_fn() returns number of bytes it can accept

		 * at this offset

		 */

		if (q->merge_bvec_fn(q, &bvm, bvec) != bvec->bv_len) {

		if (q->merge_bvec_fn(q, &bvm, bvec) < len) {

			bvec->bv_page = NULL;

			bvec->bv_len = 0;

			bvec->bv_offset = 0;