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ALSA: usb-audio: uac1: Invalidate ctl on interrupt

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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: Julian Scheel <julian@jusst.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Julian Scheel 2017-11-16 17:35:17 +01:00 committed by Takashi Iwai
parent 3aabf94c2d
commit b2500b584c
1 changed files with 6 additions and 1 deletions
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7
sound/usb/mixer.c
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@ -2330,9 +2330,14 @@ 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,