smb3: remove unneeded null check in cifs_readdir

Coverity pointed out an unneeded check.

Addresses-Coverity: 1518030 ("Null pointer dereferences")
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

fs/cifs/readdir.c

@@ -1105,10 +1105,8 @@ int cifs_readdir(struct file *file, struct dir_context *ctx)
 	 * find_cifs_entry in case there will be reconnects during
 	 * query_directory.
 	 */
-	if (cfid) {
-		close_cached_dir(cfid);
-		cfid = NULL;
-	}
+	close_cached_dir(cfid);
+	cfid = NULL;
 
  cache_not_found:
 	/*

fs/cifs/smb2ops.c

@@ -770,6 +770,7 @@ smb2_cached_lease_break(struct work_struct *work)
 /*
  * Open the and cache a directory handle.
  * Only supported for the root handle.
+ * If error then *cfid is not initialized.
  */
 int open_cached_dir(unsigned int xid, struct cifs_tcon *tcon,
 		const char *path,