From f9efb72c44da2cce9cceca01c8f6118ec1605c69 Mon Sep 17 00:00:00 2001 From: Martin Cerveny Date: Mon, 13 Feb 2017 17:23:47 +0100 Subject: [PATCH] dwc_otg: fix summarize urb->actual_length for isochronous transfers Kernel does not copy input data of ISO transfers to userspace if actual_length is set only in ISO transfers and not summarized in urb->actual_length. Fixes raspberrypi/linux#903 --- drivers/usb/host/dwc_otg/dwc_otg_hcd_linux.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/usb/host/dwc_otg/dwc_otg_hcd_linux.c +++ b/drivers/usb/host/dwc_otg/dwc_otg_hcd_linux.c @@ -334,10 +334,12 @@ static int _complete(dwc_otg_hcd_t * hcd int i; urb->error_count = dwc_otg_hcd_urb_get_error_count(dwc_otg_urb); + urb->actual_length = 0; for (i = 0; i < urb->number_of_packets; ++i) { urb->iso_frame_desc[i].actual_length = dwc_otg_hcd_urb_get_iso_desc_actual_length (dwc_otg_urb, i); + urb->actual_length += urb->iso_frame_desc[i].actual_length; urb->iso_frame_desc[i].status = dwc_otg_hcd_urb_get_iso_desc_status(dwc_otg_urb, i); }