greybus: uart: handle NULL size requests in request_operation()

Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
2014-11-17 15:15:34 -08:00 · 2014-11-17 15:15:34 -08:00 · ed7538e5a3
parent 1e776f3183
commit ed7538e5a3
1 changed files with 2 additions and 1 deletions
--- a/drivers/staging/greybus/uart-gb.c
+++ b/drivers/staging/greybus/uart-gb.c
@ -177,7 +177,8 @@ static int request_operation(struct gb_connection *connection, int type,
 		ret = -EIO;
 	} else {
 		/* Good request, so copy to the caller's buffer */
-		memcpy(response, local_response, response_size);
+		if (response_size && response)
+			memcpy(response, local_response, response_size);
 	}
 out:
 	gb_operation_destroy(operation);