ucm: Fix segfault when device argument is missing from _sw{dev, mod}

Signed-off-by: Juho Hämäläinen <juho.hamalainen@tieto.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/src/ucm/main.c b/src/ucm/main.c
index d38b7fa..0494728 100644 (file)
--- a/src/ucm/main.c
+++ b/src/ucm/main.c
@@ -1647,7 +1647,8 @@ int snd_use_case_set(snd_use_case_mgr_t *uc_mgr,
                                goto __end;
                         }
                 } else {
-                        str = NULL;
+                        err = -EINVAL;
+                        goto __end;
                 }
                 if (check_identifier(identifier, "_swdev"))
                         err = switch_device(uc_mgr, str, value);