[ALSA] unregister platform devices

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

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

1 files changed, 27 insertions, 8 deletions

diff --git a/sound/isa/wavefront/wavefront.c b/sound/isa/wavefront/wavefront.c
index 77a3012e5510..a6dcb2f970ca 100644
--- a/sound/isa/wavefront/wavefront.c
+++ b/sound/isa/wavefront/wavefront.c
@@ -83,6 +83,9 @@ MODULE_PARM_DESC(fm_port, "FM port #.");
 module_param_array(use_cs4232_midi, bool, NULL, 0444);
 MODULE_PARM_DESC(use_cs4232_midi, "Use CS4232 MPU-401 interface (inaccessibly located inside your computer)");
 
+static struct platform_device *platform_devices[SNDRV_CARDS];
+static int pnp_registered;
+
 
 #ifdef CONFIG_PNP
 
@@ -688,6 +691,17 @@ static struct pnp_card_driver wavefront_pnpc_driver = {
 
 #endif /* CONFIG_PNP */
 
+static void __init_or_module snd_wavefront_unregister_all(void)
+{
+        int i;
+
+        if (pnp_registered)
+                pnp_unregister_card_driver(&wavefront_pnpc_driver);
+        for (i = 0; i < ARRAY_SIZE(platform_devices); ++i)
+                platform_device_unregister(platform_devices[i]);
+        platform_driver_unregister(&snd_wavefront_driver);
+}
+
 static int __init alsa_card_wavefront_init(void)
 {
         int i, err, cards = 0;
@@ -704,31 +718,36 @@ static int __init alsa_card_wavefront_init(void)
                 device = platform_device_register_simple(WAVEFRONT_DRIVER,
                                                          i, NULL, 0);
                 if (IS_ERR(device)) {
-                        platform_driver_unregister(&snd_wavefront_driver);
-                        return PTR_ERR(device);
+                        err = PTR_ERR(device);
+                        goto errout;
                 }
+                platform_devices[i] = device;
                 cards++;
         }
 
         i = pnp_register_card_driver(&wavefront_pnpc_driver);
-        if (i > 0)
+        if (i >= 0) {
+                pnp_registered = 1;
                 cards += i;
+        }
 
         if (!cards) {
-                pnp_unregister_card_driver(&wavefront_pnpc_driver);
-                platform_driver_unregister(&snd_wavefront_driver);
 #ifdef MODULE
                 printk (KERN_ERR "No WaveFront cards found or devices busy\n");
 #endif
-                return -ENODEV;
+                err = -ENODEV;
+                goto errout;
         }
         return 0;
+
+ errout:
+        snd_wavefront_unregister_all();
+        return err;
 }
 
 static void __exit alsa_card_wavefront_exit(void)
 {
-        pnp_unregister_card_driver(&wavefront_pnpc_driver);
-        platform_driver_unregister(&snd_wavefront_driver);
+        snd_wavefront_unregister_all();
 }
 
 module_init(alsa_card_wavefront_init)