diff options
| -rw-r--r-- | sound/usb/endpoint.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/sound/usb/endpoint.c b/sound/usb/endpoint.c index f487d26f8d40..21049b882ee6 100644 --- a/sound/usb/endpoint.c +++ b/sound/usb/endpoint.c @@ -1018,15 +1018,18 @@ void snd_usb_handle_sync_urb(struct snd_usb_endpoint *ep, /* * Iterate through the inbound packet and prepare the lengths * for the output packet. The OUT packet we are about to send - * will have the same amount of payload bytes than the IN - * packet we just received. + * will have the same amount of payload bytes per stride as the + * IN packet we just received. Since the actual size is scaled + * by the stride, use the sender stride to calculate the length + * in case the number of channels differ between the implicitly + * fed-back endpoint and the synchronizing endpoint. */ out_packet->packets = in_ctx->packets; for (i = 0; i < in_ctx->packets; i++) { if (urb->iso_frame_desc[i].status == 0) out_packet->packet_size[i] = - urb->iso_frame_desc[i].actual_length / ep->stride; + urb->iso_frame_desc[i].actual_length / sender->stride; else out_packet->packet_size[i] = 0; } |