powerpc/spufs: Fix double unlocks

spufs return path has a bug where it could end up trying to
unlock an inode mutex twice. Fix it.
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/platforms/cell/spufs/inode.c

@@ -646,6 +646,7 @@ long spufs_create(struct path *path, struct dentry *dentry,
 
 out:
 	mutex_unlock(&path->dentry->d_inode->i_mutex);
+	dput(dentry);
 	return ret;
 }
 

arch/powerpc/platforms/cell/spufs/syscalls.c

@@ -70,8 +70,6 @@ static long do_spu_create(const char __user *pathname, unsigned int flags,
 	ret = PTR_ERR(dentry);
 	if (!IS_ERR(dentry)) {
 		ret = spufs_create(&path, dentry, flags, mode, neighbor);
-		mutex_unlock(&path.dentry->d_inode->i_mutex);
-		dput(dentry);
 		path_put(&path);
 	}