diff options
| author | Mikulas Patocka <mpatocka@redhat.com> | 2016-08-30 16:11:53 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-09-24 10:07:40 +0200 |
| commit | 319930894f3614de9dabd1e4fae34328d4274a6e (patch) | |
| tree | 734c05febdcd3c4d72f63ccf1efb570d0bf4e80a /drivers/md | |
| parent | 52fe28832acd3a5174e94a3439af8d3b51968b37 (diff) | |
dm log writes: move IO accounting earlier to fix error path
commit a5d60783df61fbb67b7596b8a0f6b4b2e05251d5 upstream.
Move log_one_block()'s atomic_inc(&lc->io_blocks) before bio_alloc() to
fix a bug that the target hangs if bio_alloc() fails. The error path
does put_io_block(lc), so atomic_inc(&lc->io_blocks) must occur before
invoking the error path to avoid underflow of lc->io_blocks.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Reviewed-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/dm-log-writes.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/md/dm-log-writes.c b/drivers/md/dm-log-writes.c index c2f29729dab1..d8956b4a7b09 100644 --- a/drivers/md/dm-log-writes.c +++ b/drivers/md/dm-log-writes.c @@ -258,12 +258,12 @@ static int log_one_block(struct log_writes_c *lc, goto out; sector++; + atomic_inc(&lc->io_blocks); bio = bio_alloc(GFP_KERNEL, block->vec_cnt); if (!bio) { DMERR("Couldn't alloc log bio"); goto error; } - atomic_inc(&lc->io_blocks); bio->bi_iter.bi_size = 0; bio->bi_iter.bi_sector = sector; bio->bi_bdev = lc->logdev->bdev; |