[ALSA] unregister platform devices

Call platform_device_unregister() for all platform devices that we've
registered.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>

sound/isa/cs423x/cs4236.c

@@ -124,6 +124,12 @@ MODULE_PARM_DESC(dma1, "DMA1 # for " IDENT " driver.");
 module_param_array(dma2, int, NULL, 0444);
 MODULE_PARM_DESC(dma2, "DMA2 # for " IDENT " driver.");
 
+static struct platform_device *platform_devices[SNDRV_CARDS];
+static int pnpc_registered;
+#ifdef CS4232
+static int pnp_registered;
+#endif
+
 struct snd_card_cs4236 {
 	struct snd_cs4231 *chip;
 	struct resource *res_sb_port;
@@ -737,6 +743,21 @@ static struct pnp_card_driver cs423x_pnpc_driver = {
 };
 #endif /* CONFIG_PNP */
 
+static void __init_or_module snd_cs423x_unregister_all(void)
+{
+	int i;
+
+	if (pnpc_registered)
+		pnp_unregister_card_driver(&cs423x_pnpc_driver);
+#ifdef CS4232
+	if (pnp_registered)
+		pnp_unregister_driver(&cs4232_pnp_driver);
+#endif
+	for (i = 0; i < ARRAY_SIZE(platform_devices); ++i)
+		platform_device_unregister(platform_devices[i]);
+	platform_driver_unregister(&cs423x_nonpnp_driver);
+}
+
 static int __init alsa_card_cs423x_init(void)
 {
 	int i, err, cards = 0;
@@ -752,40 +773,40 @@ static int __init alsa_card_cs423x_init(void)
 							 i, NULL, 0);
 		if (IS_ERR(device)) {
 			err = PTR_ERR(device);
-			platform_driver_unregister(&cs423x_nonpnp_driver);
-			return err;
+			goto errout;
 		}
+		platform_devices[i] = device;
 		cards++;
 	}
 #ifdef CS4232
 	i = pnp_register_driver(&cs4232_pnp_driver);
-	if (i > 0)
+	if (i >= 0) {
+		pnp_registered = 1;
 		cards += i;
+	}
 #endif
 	i = pnp_register_card_driver(&cs423x_pnpc_driver);
-	if (i > 0)
+	if (i >= 0) {
+		pnpc_registered = 1;
 		cards += i;
+	}
 	if (!cards) {
-#ifdef CS4232
-		pnp_unregister_driver(&cs4232_pnp_driver);
-#endif
-		pnp_unregister_card_driver(&cs423x_pnpc_driver);
-		platform_driver_unregister(&cs423x_nonpnp_driver);
 #ifdef MODULE
 		printk(KERN_ERR IDENT " soundcard not found or device busy\n");
 #endif
-		return -ENODEV;
+		err = -ENODEV;
+		goto errout;
 	}
 	return 0;
+
+ errout:
+	snd_cs423x_unregister_all();
+	return err;
 }
 
 static void __exit alsa_card_cs423x_exit(void)
 {
-#ifdef CS4232
-	pnp_unregister_driver(&cs4232_pnp_driver);
-#endif
-	pnp_unregister_card_driver(&cs423x_pnpc_driver);
-	platform_driver_unregister(&cs423x_nonpnp_driver);
+	snd_cs423x_unregister_all();
 }
 
 module_init(alsa_card_cs423x_init)