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authorLinus Torvalds <torvalds@linux-foundation.org>2013-12-05 15:33:27 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2013-12-05 15:33:27 -0800
commit5ee540613db504a10e15fafaf4c08cac96aa1823 (patch)
treedc0b348debbb557866285dbee51e29ff3496ffa4 /drivers/md/md.c
parent29be6345bbaec8502a70c4e2204d5818b48c4e8f (diff)
parent0d11e6aca396e679c07b2dd6af5dc8b7f041fbbd (diff)
downloadlinux-5ee540613db504a10e15fafaf4c08cac96aa1823.tar.bz2
Merge branch 'for-linus' of git://git.kernel.dk/linux-block
Pull block layer fixes from Jens Axboe: "A small collection of fixes for the current series. It contains: - A fix for a use-after-free of a request in blk-mq. From Ming Lei - A fix for a blk-mq bug that could attempt to dereference a NULL rq if allocation failed - Two xen-blkfront small fixes - Cleanup of submit_bio_wait() type uses in the kernel, unifying that. From Kent - A fix for 32-bit blkg_rwstat reading. I apologize for this one looking mangled in the shortlog, it's entirely my fault for missing an empty line between the description and body of the text" * 'for-linus' of git://git.kernel.dk/linux-block: blk-mq: fix use-after-free of request blk-mq: fix dereference of rq->mq_ctx if allocation fails block: xen-blkfront: Fix possible NULL ptr dereference xen-blkfront: Silence pfn maybe-uninitialized warning block: submit_bio_wait() conversions Update of blkg_stat and blkg_rwstat may happen in bh context
Diffstat (limited to 'drivers/md/md.c')
-rw-r--r--drivers/md/md.c12
1 files changed, 1 insertions, 11 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c
index e60cebf3f519..21f4d7ff0da2 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -776,16 +776,10 @@ void md_super_wait(struct mddev *mddev)
finish_wait(&mddev->sb_wait, &wq);
}
-static void bi_complete(struct bio *bio, int error)
-{
- complete((struct completion*)bio->bi_private);
-}
-
int sync_page_io(struct md_rdev *rdev, sector_t sector, int size,
struct page *page, int rw, bool metadata_op)
{
struct bio *bio = bio_alloc_mddev(GFP_NOIO, 1, rdev->mddev);
- struct completion event;
int ret;
rw |= REQ_SYNC;
@@ -801,11 +795,7 @@ int sync_page_io(struct md_rdev *rdev, sector_t sector, int size,
else
bio->bi_sector = sector + rdev->data_offset;
bio_add_page(bio, page, size, 0);
- init_completion(&event);
- bio->bi_private = &event;
- bio->bi_end_io = bi_complete;
- submit_bio(rw, bio);
- wait_for_completion(&event);
+ submit_bio_wait(rw, bio);
ret = test_bit(BIO_UPTODATE, &bio->bi_flags);
bio_put(bio);