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diff --git a/drivers/media/usb/uvc/uvc_video.c b/drivers/media/usb/uvc/uvc_video.c index e3567aeb0007..446b3f16545d 100644 --- a/drivers/media/usb/uvc/uvc_video.c +++ b/drivers/media/usb/uvc/uvc_video.c @@ -1946,7 +1946,8 @@ static int uvc_init_video_isoc(struct uvc_streaming *stream, urb->context = uvc_urb; urb->pipe = usb_rcvisocpipe(stream->dev->udev, ep->desc.bEndpointAddress); - urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP; + urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP | + URB_USBMON_NEED_SYNC; urb->transfer_dma = uvc_urb->dma; urb->interval = ep->desc.bInterval; urb->transfer_buffer = uvc_urb->buffer;
Since commit "20e1dbf2bbe2 media: uvcvideo: Use dma_alloc_noncontiguous API", the driver is allocating non-coherent buffer for urb. This will add URB_USBMON_NEED_SYNC flag to inform usb monitor needs do dma sync when record data. Signed-off-by: Xu Yang <xu.yang_2@nxp.com> --- drivers/media/usb/uvc/uvc_video.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)