[PATCH v2 4/4] Btrfs: handle EAGAIN case properly in btrfs_drop_snapshot()

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We may return early in btrfs_drop_snapshot(), we shouldn't
call btrfs_std_err() for this case, fix it.

Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Wang Shilong <wangsl.fnst@xxxxxxxxxxxxxx>
---
Changelog v1->v2: cc stable
---
 fs/btrfs/extent-tree.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 4fa1437..81650cf 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -8272,7 +8272,7 @@ out:
 	 */
 	if (!for_reloc && root_dropped == false)
 		btrfs_add_dead_root(root);
-	if (err)
+	if (err && err != -EAGAIN)
 		btrfs_std_error(root->fs_info, err);
 	return err;
 }
-- 
1.8.3.1

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