USB: audio gadget: free alsa devices when unloading
Signed-off-by: Cliff Cai <cliff.cai@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/gadget/u_audio.c b/drivers/usb/gadget/u_audio.c
index 8252595..35e0930 100644
--- a/drivers/usb/gadget/u_audio.c
+++ b/drivers/usb/gadget/u_audio.c
@@ -288,6 +288,7 @@
return 0;
}
+static struct gaudio *the_card;
/**
* gaudio_setup - setup ALSA interface and preparing for USB transfer
*
@@ -303,6 +304,9 @@
if (ret)
ERROR(card, "we need at least one control device\n");
+ if (!the_card)
+ the_card = card;
+
return ret;
}
@@ -312,9 +316,11 @@
*
* This is called to free all resources allocated by @gaudio_setup().
*/
-void gaudio_cleanup(struct gaudio *card)
+void gaudio_cleanup(void)
{
- if (card)
- gaudio_close_snd_dev(card);
+ if (the_card) {
+ gaudio_close_snd_dev(the_card);
+ the_card = NULL;
+ }
}