dlm: add missing -ENOMEM if alloc_workqueue() fails

This patch sets an missing -ENOMEM as error return value when the
allocation of the dlm workqueue fails.

Fixes: 94e180d ("dlm: async freeing of lockspace resources")
Reported-by: kernel test robot <[email protected]>
Reported-by: Dan Carpenter <[email protected]>
Closes: https://lore.kernel.org/r/[email protected]/
Signed-off-by: Alexander Aring <[email protected]>
Signed-off-by: David Teigland <[email protected]>

Author: Alexander Aring

fs/dlm/main.c

@@ -53,8 +53,10 @@ static int __init init_dlm(void)
 		goto out_user;
 
 	dlm_wq = alloc_workqueue("dlm_wq", 0, 0);
-	if (!dlm_wq)
+	if (!dlm_wq) {
+		error = -ENOMEM;
 		goto out_plock;
+	}
 
 	printk("DLM installed\n");