Even though btrfs_start_dirty_block_groups fairly in the beginning of
btrfs_commit_transaction outside of the critical section defined by the
transaction states it can only be run by a single comitter. In other
words it defines its own critical section thanks to the
BTRFS_TRANS_DIRTY_BG run flag and ro_block_group_mutex. However, its
error handling is outside of this critical section which is a bit
counter-intuitive. So move the error handling righ after the function
is executed and let the sole runner of dirty block groups handle the
return value. no functional changes
Signed-off-by: Nikolay Borisov <nborisov@xxxxxxxx>
---
fs/btrfs/transaction.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index a57065f022ff..2cdf7be02f41 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -2012,12 +2012,13 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans)
run_it = 1;
mutex_unlock(&fs_info->ro_block_group_mutex);
- if (run_it)
+ if (run_it) {
ret = btrfs_start_dirty_block_groups(trans);
- }
- if (ret) {
- btrfs_end_transaction(trans);
- return ret;
+ if (ret) {
+ btrfs_end_transaction(trans);
+ return ret;
+ }
+ }
}
spin_lock(&fs_info->trans_lock);
--
2.7.4
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