btrfs: filp_open() returns ERR_PTR() on failure, not NULL...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
(cherry picked from commit 98af592f5bf863137ae2872ed03720f02fbc82c3)

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 2cb88d26c7f90620213634a8f8c89ca5c1246bcb..b9f2dd81c21a7d15d359b6ebc8255c1f563d5fad 100644 (file)
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -1485,7 +1485,7 @@ static void update_dev_time(char *path_name)
        struct file *filp;
 
        filp = filp_open(path_name, O_RDWR, 0);
-       if (!filp)
+       if (IS_ERR(filp))
                return;
        file_update_time(filp);
        filp_close(filp, NULL);