[ALSA] Fix probe of non-PnP ISA devices

isa_register_driver() returns an error if no device is found
and it's no fatal error for the drivers with pnp support.

Signed-off-by: Rene Herman <rene.herman@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

1 files changed, 10 insertions, 5 deletions

diff --git a/sound/isa/gus/interwave.c b/sound/isa/gus/interwave.c
index 3e4657255536..0220cdbe1a2a 100644
--- a/sound/isa/gus/interwave.c
+++ b/sound/isa/gus/interwave.c
@@ -135,6 +135,7 @@ struct snd_interwave {
 
 
 #ifdef CONFIG_PNP
+static int isa_registered;
 static int pnp_registered;
 
 static struct pnp_card_device_id snd_interwave_pnpids[] = {
@@ -934,15 +935,18 @@ static int __init alsa_card_interwave_init(void)
         int err;
 
         err = isa_register_driver(&snd_interwave_driver, SNDRV_CARDS);
-        if (err < 0)
-                return err;
 #ifdef CONFIG_PNP
-        /* ISA PnP cards */
+        if (!err)
+                isa_registered = 1;
+
         err = pnp_register_card_driver(&interwave_pnpc_driver);
         if (!err)
                 pnp_registered = 1;
+
+        if (isa_registered)
+                err = 0;
 #endif
-        return 0;
+        return err;
 }
 
 static void __exit alsa_card_interwave_exit(void)
@@ -950,8 +954,9 @@ static void __exit alsa_card_interwave_exit(void)
 #ifdef CONFIG_PNP
         if (pnp_registered)
                 pnp_unregister_card_driver(&interwave_pnpc_driver);
+        if (isa_registered)
 #endif
-        isa_unregister_driver(&snd_interwave_driver);
+                isa_unregister_driver(&snd_interwave_driver);
 }
 
 module_init(alsa_card_interwave_init)