diff --git a/drivers/media/usb/usbtv/usbtv-video.c b/drivers/media/usb/usbtv/usbtv-video.c index 4ebb33943f9a..4ecb27b2d619 100644 --- a/drivers/media/usb/usbtv/usbtv-video.c +++ b/drivers/media/usb/usbtv/usbtv-video.c @@ -312,20 +312,24 @@ static void usbtv_image_chunk(struct usbtv *usbtv, __be32 *chunk) usbtv_chunk_to_vbuf(frame, &chunk[1], chunk_no, odd); usbtv->chunks_done++; - /* Last chunk in a frame, signalling an end */ - if (odd && chunk_no == usbtv->n_chunks-1) { - int size = vb2_plane_size(&buf->vb.vb2_buf, 0); - enum vb2_buffer_state state = usbtv->chunks_done == - usbtv->n_chunks ? - VB2_BUF_STATE_DONE : - VB2_BUF_STATE_ERROR; + /* Last chunk in a field */ + if (chunk_no == usbtv->n_chunks-1) { + /* Last chunk in a frame, signalling an end */ + if (odd && !usbtv->last_odd) { + int size = vb2_plane_size(&buf->vb.vb2_buf, 0); + enum vb2_buffer_state state = usbtv->chunks_done == + usbtv->n_chunks ? + VB2_BUF_STATE_DONE : + VB2_BUF_STATE_ERROR; - buf->vb.field = V4L2_FIELD_INTERLACED; - buf->vb.sequence = usbtv->sequence++; - buf->vb.vb2_buf.timestamp = ktime_get_ns(); - vb2_set_plane_payload(&buf->vb.vb2_buf, 0, size); - vb2_buffer_done(&buf->vb.vb2_buf, state); - list_del(&buf->list); + buf->vb.field = V4L2_FIELD_INTERLACED; + buf->vb.sequence = usbtv->sequence++; + buf->vb.vb2_buf.timestamp = ktime_get_ns(); + vb2_set_plane_payload(&buf->vb.vb2_buf, 0, size); + vb2_buffer_done(&buf->vb.vb2_buf, state); + list_del(&buf->list); + } + usbtv->last_odd = odd; } spin_unlock_irqrestore(&usbtv->buflock, flags); @@ -639,6 +643,7 @@ static int usbtv_start_streaming(struct vb2_queue *vq, unsigned int count) if (usbtv->udev == NULL) return -ENODEV; + usbtv->last_odd = 1; usbtv->sequence = 0; return usbtv_start(usbtv); } diff --git a/drivers/media/usb/usbtv/usbtv.h b/drivers/media/usb/usbtv/usbtv.h index 19cb8bf7c4e9..161b38d5cfa0 100644 --- a/drivers/media/usb/usbtv/usbtv.h +++ b/drivers/media/usb/usbtv/usbtv.h @@ -95,6 +95,7 @@ struct usbtv { int width, height; int n_chunks; int iso_size; + int last_odd; unsigned int sequence; struct urb *isoc_urbs[USBTV_ISOC_TRANSFERS];