1 files changed, 12 insertions, 2 deletions

diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c
index b375d58871e7..19e79953f2e3 100644
--- a/sound/usb/pcm.c
+++ b/sound/usb/pcm.c
@@ -595,6 +595,7 @@ static int configure_sync_endpoint(struct snd_usb_substream *subs)
 						   subs->pcm_format,
 						   subs->channels,
 						   subs->period_bytes,
+						   0, 0,
 						   subs->cur_rate,
 						   subs->cur_audiofmt,
 						   NULL);
@@ -631,6 +632,7 @@ static int configure_sync_endpoint(struct snd_usb_substream *subs)
 					  subs->pcm_format,
 					  sync_fp->channels,
 					  sync_period_bytes,
+					  0, 0,
 					  subs->cur_rate,
 					  sync_fp,
 					  NULL);
@@ -653,6 +655,8 @@ static int configure_endpoint(struct snd_usb_substream *subs)
 					  subs->pcm_format,
 					  subs->channels,
 					  subs->period_bytes,
+					  subs->period_frames,
+					  subs->buffer_periods,
 					  subs->cur_rate,
 					  subs->cur_audiofmt,
 					  subs->sync_endpoint);
@@ -689,6 +693,8 @@ static int snd_usb_hw_params(struct snd_pcm_substream *substream,
 
 	subs->pcm_format = params_format(hw_params);
 	subs->period_bytes = params_period_bytes(hw_params);
+	subs->period_frames = params_period_size(hw_params);
+	subs->buffer_periods = params_periods(hw_params);
 	subs->channels = params_channels(hw_params);
 	subs->cur_rate = params_rate(hw_params);
 
@@ -1363,6 +1369,7 @@ static void prepare_playback_urb(struct snd_usb_substream *subs,
 	frames = 0;
 	urb->number_of_packets = 0;
 	spin_lock_irqsave(&subs->lock, flags);
+	subs->frame_limit += ep->max_urb_frames;
 	for (i = 0; i < ctx->packets; i++) {
 		if (ctx->packet_size[i])
 			counts = ctx->packet_size[i];
@@ -1377,6 +1384,7 @@ static void prepare_playback_urb(struct snd_usb_substream *subs,
 		subs->transfer_done += counts;
 		if (subs->transfer_done >= runtime->period_size) {
 			subs->transfer_done -= runtime->period_size;
+			subs->frame_limit = 0;
 			period_elapsed = 1;
 			if (subs->fmt_type == UAC_FORMAT_TYPE_II) {
 				if (subs->transfer_done > 0) {
@@ -1399,8 +1407,10 @@ static void prepare_playback_urb(struct snd_usb_substream *subs,
 				break;
 			}
 		}
-		if (period_elapsed &&
-		    !snd_usb_endpoint_implicit_feedback_sink(subs->data_endpoint)) /* finish at the period boundary */
+		/* finish at the period boundary or after enough frames */
+		if ((period_elapsed ||
+				subs->transfer_done >= subs->frame_limit) &&
+		    !snd_usb_endpoint_implicit_feedback_sink(ep))
 			break;
 	}
 	bytes = frames * ep->stride;