btrfs: remove redundant inode null check

The check for a null inode is redundant since the function
is a callback for exportfs, which will itself crash if
dentry->d_inode or parent->d_inode is NULL.  Removing the
null check makes this consistent with other file systems.

Also remove the redundant null dir check too.

Found with static analysis by CoverityScan, CID 1389472

Kudos to Jeff Mahoney for reviewing and explaining the error in
my original patch (most of this explanation went into the above
commit message) and David Sterba for pointing out that the dir
check is also redundant.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/export.c b/fs/btrfs/export.c
index 340d90751263ca22c0fec999def023343401b3b4..4f774314a0dc5a6529ff3208b1ae4d22e9d2c615 100644 (file)
--- a/fs/btrfs/export.c
+++ b/fs/btrfs/export.c
@@ -235,9 +235,6 @@ static int btrfs_get_name(struct dentry *parent, char *name,
        int ret;
        u64 ino;
 
-       if (!dir || !inode)
-               return -EINVAL;
-
        if (!S_ISDIR(dir->i_mode))
                return -EINVAL;