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Revert "blkdev: fix merge_bvec_fn return value checks"

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This reverts commit 9f7cdbc33f.

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

Reported-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Tested-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Jens Axboe 2010-03-02 19:17:34 +01:00
parent 13dda80e48
commit 9599945bac
1 changed files with 2 additions and 2 deletions
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4
fs/bio.c
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@ -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;