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

   1 From 0efd687c78d47645956af472eac1b8d8f3a973d5 Mon Sep 17 00:00:00 2001
   2 From: P33M <p33m@github.com>
   3 Date: Wed, 16 Jan 2019 10:17:52 +0000
   4 Subject: [PATCH 307/703] dwc_otg: fix bug with port_addr assignment for
   5  single-TT hubs
   6
   7 See https://github.com/raspberrypi/linux/issues/2734
   8
   9 The "Hub Port" field in the split transaction packet was always set
  10 to 1 for single-TT hubs. The majority of single-TT hub products
  11 apparently ignore this field and broadcast to all downstream enabled
  12 ports, which masked the issue. A subset of hub devices apparently
  13 need the port number to be exact or split transactions will fail.
  14 ---
  15  drivers/usb/host/dwc_otg/dwc_otg_hcd_linux.c | 2 +-
  16  1 file changed, 1 insertion(+), 1 deletion(-)
  17
  18 --- a/drivers/usb/host/dwc_otg/dwc_otg_hcd_linux.c
  19 +++ b/drivers/usb/host/dwc_otg/dwc_otg_hcd_linux.c
  20 @@ -232,7 +232,7 @@ static int _hub_info(dwc_otg_hcd_t * hcd
  21                 else
  22                         *hub_addr = urb->dev->tt->hub->devnum;
  23         }
  24 -       *port_addr = urb->dev->tt->multi ? urb->dev->ttport : 1;
  25 +       *port_addr = urb->dev->ttport;
  26     } else {
  27          *hub_addr = 0;
  28         *port_addr = urb->dev->ttport;