git.openwrt.org Git - openwrt/staging/ldir.git/blob

   1 From f9efb72c44da2cce9cceca01c8f6118ec1605c69 Mon Sep 17 00:00:00 2001
   2 From: Martin Cerveny <M.Cerveny@computer.org>
   3 Date: Mon, 13 Feb 2017 17:23:47 +0100
   4 Subject: [PATCH] dwc_otg: fix summarize urb->actual_length for isochronous
   5  transfers
   6
   7 Kernel does not copy input data of ISO transfers to userspace
   8 if actual_length is set only in ISO transfers and not summarized
   9 in urb->actual_length. Fixes raspberrypi/linux#903
  10 ---
  11  drivers/usb/host/dwc_otg/dwc_otg_hcd_linux.c | 2 ++
  12  1 file changed, 2 insertions(+)
  13
  14 --- a/drivers/usb/host/dwc_otg/dwc_otg_hcd_linux.c
  15 +++ b/drivers/usb/host/dwc_otg/dwc_otg_hcd_linux.c
  16 @@ -334,10 +334,12 @@ static int _complete(dwc_otg_hcd_t * hcd
  17                 int i;
  18
  19                 urb->error_count = dwc_otg_hcd_urb_get_error_count(dwc_otg_urb);
  20 +               urb->actual_length = 0;
  21                 for (i = 0; i < urb->number_of_packets; ++i) {
  22                         urb->iso_frame_desc[i].actual_length =
  23                             dwc_otg_hcd_urb_get_iso_desc_actual_length
  24                             (dwc_otg_urb, i);
  25 +                       urb->actual_length += urb->iso_frame_desc[i].actual_length;
  26                         urb->iso_frame_desc[i].status =
  27                             dwc_otg_hcd_urb_get_iso_desc_status(dwc_otg_urb, i);
  28                 }