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Diffstat (limited to 'sound/usb/pcm.c')
-rw-r--r--sound/usb/pcm.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c
index b4ef410e5a98..7fb17c8eb49d 100644
--- a/sound/usb/pcm.c
+++ b/sound/usb/pcm.c
@@ -391,6 +391,20 @@ static int set_sync_endpoint(struct snd_usb_substream *subs,
*/
attr = fmt->ep_attr & USB_ENDPOINT_SYNCTYPE;
+ if ((is_playback && (attr != USB_ENDPOINT_SYNC_ASYNC)) ||
+ (!is_playback && (attr != USB_ENDPOINT_SYNC_ADAPTIVE))) {
+
+ /*
+ * In these modes the notion of sync_endpoint is irrelevant.
+ * Reset pointers to avoid using stale data from previously
+ * used settings, e.g. when configuration and endpoints were
+ * changed
+ */
+
+ subs->sync_endpoint = NULL;
+ subs->data_endpoint->sync_master = NULL;
+ }
+
err = set_sync_ep_implicit_fb_quirk(subs, dev, altsd, attr);
if (err < 0)
return err;