[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, 14 insertions, 2 deletions

diff --git a/sound/drivers/dummy.c b/sound/drivers/dummy.c
index 186117571745..96d207051628 100644
--- a/sound/drivers/dummy.c
+++ b/sound/drivers/dummy.c
@@ -144,6 +144,8 @@ MODULE_PARM_DESC(pcm_substreams, "PCM substreams # (1-16) for dummy driver.");
 //module_param_array(midi_devs, int, NULL, 0444);
 //MODULE_PARM_DESC(midi_devs, "MIDI devices # (0-2) for dummy driver.");
 
+static struct platform_device *devices[SNDRV_CARDS];
+
 #define MIXER_ADDR_MASTER       0
 #define MIXER_ADDR_LINE         1
 #define MIXER_ADDR_MIC          2
@@ -634,6 +636,15 @@ static struct platform_driver snd_dummy_driver = {
         },
 };
 
+static void __init_or_module snd_dummy_unregister_all(void)
+{
+        int i;
+
+        for (i = 0; i < ARRAY_SIZE(devices); ++i)
+                platform_device_unregister(devices[i]);
+        platform_driver_unregister(&snd_dummy_driver);
+}
+
 static int __init alsa_card_dummy_init(void)
 {
         int i, cards, err;
@@ -650,6 +661,7 @@ static int __init alsa_card_dummy_init(void)
                         err = PTR_ERR(device);
                         goto errout;
                 }
+                devices[i] = device;
                 cards++;
         }
         if (!cards) {
@@ -662,13 +674,13 @@ static int __init alsa_card_dummy_init(void)
         return 0;
 
  errout:
-        platform_driver_unregister(&snd_dummy_driver);
+        snd_dummy_unregister_all();
         return err;
 }
 
 static void __exit alsa_card_dummy_exit(void)
 {
-        platform_driver_unregister(&snd_dummy_driver);
+        snd_dummy_unregister_all();
 }
 
 module_init(alsa_card_dummy_init)