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authorLinus Torvalds <torvalds@linux-foundation.org>2010-02-02 12:54:37 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2010-02-02 12:54:37 -0800
commit1a45dcfe2525e9432cb4aba461d4994fc2befe42 (patch)
tree9df1443950d3bf64de2efd23878065b0a4760f61 /fs
parent02b709df817c0db174f249cc59e5f7fd01b64d92 (diff)
parent1efe8fe1c2240acc476bed77740883df63373862 (diff)
Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block
* 'for-linus' of git://git.kernel.dk/linux-2.6-block: cfq-iosched: Do not idle on async queues blk-cgroup: Fix potential deadlock in blk-cgroup block: fix bugs in bio-integrity mempool usage block: fix bio_add_page for non trivial merge_bvec_fn case drbd: null dereference bug drbd: fix max_segment_size initialization
Diffstat (limited to 'fs')
-rw-r--r--fs/bio-integrity.c3
-rw-r--r--fs/bio.c7
2 files changed, 8 insertions, 2 deletions
diff --git a/fs/bio-integrity.c b/fs/bio-integrity.c
index 49a34e7f730..a16f29e888c 100644
--- a/fs/bio-integrity.c
+++ b/fs/bio-integrity.c
@@ -61,7 +61,7 @@ static inline unsigned int vecs_to_idx(unsigned int nr)
static inline int use_bip_pool(unsigned int idx)
{
- if (idx == BIOVEC_NR_POOLS)
+ if (idx == BIOVEC_MAX_IDX)
return 1;
return 0;
@@ -95,6 +95,7 @@ struct bio_integrity_payload *bio_integrity_alloc_bioset(struct bio *bio,
/* Use mempool if lower order alloc failed or max vecs were requested */
if (bip == NULL) {
+ idx = BIOVEC_MAX_IDX; /* so we free the payload properly later */
bip = mempool_alloc(bs->bio_integrity_pool, gfp_mask);
if (unlikely(bip == NULL)) {
diff --git a/fs/bio.c b/fs/bio.c
index 12429c9553e..88094afc29e 100644
--- a/fs/bio.c
+++ b/fs/bio.c
@@ -542,13 +542,18 @@ static int __bio_add_page(struct request_queue *q, struct bio *bio, struct page
if (page == prev->bv_page &&
offset == prev->bv_offset + prev->bv_len) {
+ unsigned int prev_bv_len = prev->bv_len;
prev->bv_len += len;
if (q->merge_bvec_fn) {
struct bvec_merge_data bvm = {
+ /* prev_bvec is already charged in
+ bi_size, discharge it in order to
+ simulate merging updated prev_bvec
+ as new bvec. */
.bi_bdev = bio->bi_bdev,
.bi_sector = bio->bi_sector,
- .bi_size = bio->bi_size,
+ .bi_size = bio->bi_size - prev_bv_len,
.bi_rw = bio->bi_rw,
};