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| author | Muthu Kumar <muthu.lkml@gmail.com> | 2014-01-09 01:19:52 +0400 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2014-01-09 01:19:52 +0400 |
| commit | c7b22bb19a24fef1a851a41e5c0657c0c4a41550 (patch) | |
| tree | 1fac305df2871fdeb16e2ef03d2c39c1d87ba9f5 | |
| parent | 1331107f8a8611f3520046f50c44af9b2102bfd2 (diff) | |
| download | linux-c7b22bb19a24fef1a851a41e5c0657c0c4a41550.tar.xz | |
btrfs: fix missing increment of bi_remaining
In btrfs_end_bio(), we increment bi_remaining if is_orig_bio. If not,
we restore the orig_bio but failed to increment bi_remaining for
orig_bio, which triggers a BUG_ON later when bio_endio is called. Fix
is to increment bi_remaining when we restore the orig bio as well.
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
CC: Kent Overstreet <kmo@daterainc.com>
Signed-off-by: Muthukumar Ratty <muthur@gmail.com>
Reviewed-by: Chris Mason <clm@fb.com>
Tested-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | fs/btrfs/volumes.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 37972d5db737..54d2685a3071 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -5297,9 +5297,14 @@ static void btrfs_end_bio(struct bio *bio, int err) if (!is_orig_bio) { bio_put(bio); bio = bbio->orig_bio; - } else { - atomic_inc(&bio->bi_remaining); } + + /* + * We have original bio now. So increment bi_remaining to + * account for it in endio + */ + atomic_inc(&bio->bi_remaining); + bio->bi_private = bbio->private; bio->bi_end_io = bbio->end_io; btrfs_io_bio(bio)->mirror_num = bbio->mirror_num; |