Perftest: fix mr registeration fallback

Check for the right errno that returned from the missing
implementation.

It tested EPROTONOSUPPORT but it should have tested for EOPNOTSUPP.

Reviewed-by: Yonatan Nachum <[email protected]>
Reviewed-by: Yossi Leybovich <[email protected]>
Signed-off-by: Ramon Fried <[email protected]>

Author: mellowcandle

src/perftest_resources.c

@@ -1832,7 +1832,7 @@ static int register_memory_region(struct pingpong_context *ctx,
 
 	mr = register_func(ctx, user_param, qp_index, flags, dmabuf_fd, dmabuf_offset);
 
-	if (!mr && errno == EPROTONOSUPPORT && register_func != register_mr) {
+	if (!mr && errno == EOPNOTSUPP && register_func != register_mr) {
 		/* If extended registration is not supported, fall back to standard registration */
 		register_func = register_mr;
 		mr = register_func(ctx, user_param, qp_index, flags, dmabuf_fd, dmabuf_offset);