[patch 1/2] Btrfs: double unlock bug in error handling

[Dan Carpenter]

The caller expects this function to return with the lock held and
releases it immediately on error.

Signed-off-by: Dan Carpenter <dan.carpen...@oracle.com>

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 2b35f8d..a0bb9dc 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -2301,6 +2301,7 @@ static noinline int run_clustered_refs(struct 
btrfs_trans_handle *trans,
 
                                if (ret) {
                                        printk(KERN_DEBUG "btrfs: 
run_delayed_extent_op returned %d\n", ret);
+                                       spin_lock(&delayed_refs->lock);
                                        return ret;
                                }
 
@@ -2331,6 +2332,7 @@ static noinline int run_clustered_refs(struct 
btrfs_trans_handle *trans,
 
                if (ret) {
                        printk(KERN_DEBUG "btrfs: run_one_delayed_ref returned 
%d\n", ret);
+                       spin_lock(&delayed_refs->lock);
                        return ret;
                }
 
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