verbs: Fix execute_ioctl_fallback() bad flow

[ Upstream commit b60b192 ]

Fix execute_ioctl_fallback() bad flow to set the 'ret' value correctly.

Fixes: e225b20 ("verbs: Add basic infrastructure for mixed write and ioctl cmds")
Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Nicolas Morey-Chaisemartin <nmoreychaisemartin@suse.com>

libibverbs/cmd_fallback.c

@@ -63,7 +63,7 @@ enum write_fallback _check_legacy(struct ibv_command_buffer *cmdb, int *ret)
 	}
 
 	if (fallback_ioctl_only)
-		return ERROR;
+		goto not_supp;
 
 	if (fallback_require_ex)
 		return TRY_WRITE_EX;