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| author | Julian Scheel <julian@jusst.de> | 2017-11-16 17:35:17 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2017-11-17 11:55:45 +0100 |
| commit | b2500b584cfd228d67e1e43daf27c8af865b499e (patch) | |
| tree | 95d61e4c860e06f7adb5890e2c61e2770607eb99 /sound/usb/mixer.c | |
| parent | 3aabf94c2d95fe465d5fa8590113d1c1f7d8333d (diff) | |
| download | linux-b2500b584cfd228d67e1e43daf27c8af865b499e.tar.gz | |
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: Julian Scheel <julian@jusst.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/usb/mixer.c')
| -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 91bc8f18791e..1beb5b4d027e 100644 --- a/sound/usb/mixer.c +++ b/sound/usb/mixer.c @@ -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, |