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Commit b2500b58 authored by Julian Scheel's avatar Julian Scheel Committed by Takashi Iwai
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ALSA: usb-audio: uac1: Invalidate ctl on interrupt 



When an interrupt occurs, the value of at least one of the belonging
controls should have changed. To make sure they get re-read from device
on the next read, invalidate the cache. This was correctly implemented
for uac2 already, but missing for uac1.

Signed-off-by: default avatarJulian Scheel <julian@jusst.de>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 3aabf94c

sound/usb/mixer.c

+6 −1
Original line number Diff line number Diff line
@@ -2330,10 +2330,15 @@ void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid) 
{

	struct usb_mixer_elem_list *list;



	for (list = mixer->id_elems[unitid]; list; list = list->next_id_elem)

	for (list = mixer->id_elems[unitid]; list; list = list->next_id_elem) {

		struct usb_mixer_elem_info *info =

			(struct usb_mixer_elem_info *)list;

		/* invalidate cache, so the value is read from the device */

		info->cached = 0;

		snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE,

			       &list->kctl->id);

	}

}



static void snd_usb_mixer_dump_cval(struct snd_info_buffer *buffer,

				    struct usb_mixer_elem_list *list)