diff options
| author | Julian Scheel <julian@jusst.de> | 2017-11-16 17:35:17 +0100 |
|---|---|---|
| committer | Sasha Levin <sashal@kernel.org> | 2020-06-30 15:38:02 -0400 |
| commit | db8971309faeb7408bc8ac3d405aea8fe6e4aeb5 (patch) | |
| tree | dc81423364a44e4f217372d07b7239a1f2e2e307 /sound | |
| parent | 01317ebd8598f71b9c742d579cd7f4ff8e1af7ff (diff) | |
ALSA: usb-audio: uac1: Invalidate ctl on interrupt
[ Upstream commit b2500b584cfd228d67e1e43daf27c8af865b499e ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/usb/mixer.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c index dbbc5609b453..33deb5ec8b7a 100644 --- a/sound/usb/mixer.c +++ b/sound/usb/mixer.c @@ -2403,9 +2403,14 @@ 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, |