target/linux/brcm2708/patches-4.4/0151-dcw_otg-trim-xfer-length-when-buffer-larger-than-all.patch

   1 From 5c7f4533904206fc11e2073e709598a65da19e10 Mon Sep 17 00:00:00 2001
   2 From: popcornmix <popcornmix@gmail.com>
   3 Date: Fri, 12 Feb 2016 14:50:25 +0000
   4 Subject: [PATCH 151/156] dcw_otg: trim xfer length when buffer larger than
   5  allocated size is received
   6
   7 ---
   8  drivers/usb/host/dwc_otg/dwc_otg_hcd_intr.c | 11 +++++++++++
   9  1 file changed, 11 insertions(+)
  10
  11 --- a/drivers/usb/host/dwc_otg/dwc_otg_hcd_intr.c
  12 +++ b/drivers/usb/host/dwc_otg/dwc_otg_hcd_intr.c
  13 @@ -737,6 +737,11 @@ static int update_urb_state_xfer_comp(dw
  14                                              DWC_OTG_HC_XFER_COMPLETE,
  15                                              &short_read);
  16
  17 +       if (urb->actual_length + xfer_length > urb->length) {
  18 +               DWC_WARN("%s(): trimming xfer length\n", __func__);
  19 +               xfer_length = urb->length - urb->actual_length;
  20 +       }
  21 +
  22         /* non DWORD-aligned buffer case handling. */
  23         if (hc->align_buff && xfer_length && hc->ep_is_in) {
  24                 dwc_memcpy(urb->buf + urb->actual_length, hc->qh->dw_align_buf,
  25 @@ -1423,6 +1428,12 @@ static void update_urb_state_xfer_intr(d
  26  {
  27         uint32_t bytes_transferred = get_actual_xfer_length(hc, hc_regs, qtd,
  28                                                             halt_status, NULL);
  29 +
  30 +       if (urb->actual_length + bytes_transferred > urb->length) {
  31 +               DWC_WARN("%s(): trimming xfer length\n", __func__);
  32 +               bytes_transferred = urb->length - urb->actual_length;
  33 +       }
  34 +
  35         /* non DWORD-aligned buffer case handling. */
  36         if (hc->align_buff && bytes_transferred && hc->ep_is_in) {
  37                 dwc_memcpy(urb->buf + urb->actual_length, hc->qh->dw_align_buf,