[PATCH 6.4 187/239] btrfs: check if the transaction was aborted at btrfs_wait_for_commit()

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From: Filipe Manana <fdmanana@xxxxxxxx>

commit bf7ecbe9875061bf3fce1883e3b26b77f847d1e8 upstream.

At btrfs_wait_for_commit() we wait for a transaction to finish and then
always return 0 (success) without checking if it was aborted, in which
case the transaction didn't happen due to some critical error. Fix this
by checking if the transaction was aborted.

Fixes: 462045928bda ("Btrfs: add START_SYNC, WAIT_SYNC ioctls")
CC: stable@xxxxxxxxxxxxxxx # 4.19+
Reviewed-by: Qu Wenruo <wqu@xxxxxxxx>
Signed-off-by: Filipe Manana <fdmanana@xxxxxxxx>
Reviewed-by: David Sterba <dsterba@xxxxxxxx>
Signed-off-by: David Sterba <dsterba@xxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 fs/btrfs/transaction.c |    1 +
 1 file changed, 1 insertion(+)

--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -933,6 +933,7 @@ int btrfs_wait_for_commit(struct btrfs_f
 	}
 
 	wait_for_commit(cur_trans, TRANS_STATE_COMPLETED);
+	ret = cur_trans->aborted;
 	btrfs_put_transaction(cur_trans);
 out:
 	return ret;





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