brcm2708: update against latest rpi-3.10.y branch
[openwrt/svn-archive/archive.git] / target / linux / brcm2708 / patches-3.10 / 0093-dwc_otg-Enable-NAK-holdoff-for-control-split-transac.patch
1 From 3d8a3a5cbcd4d36768cf53e778d8165aefabd5b0 Mon Sep 17 00:00:00 2001
2 From: P33M <P33M@github.com>
3 Date: Fri, 20 Sep 2013 16:08:27 +0100
4 Subject: [PATCH 093/174] dwc_otg: Enable NAK holdoff for control split
5 transactions
6
7 Certain low-speed devices take a very long time to complete a
8 data or status stage of a control transaction, producing NAK
9 responses until they complete internal processing - the USB2.0
10 spec limit is up to 500mS. This causes the same type of interrupt
11 storm as seen with USB-serial dongles prior to c8edb238.
12
13 In certain circumstances, usually while booting, this interrupt
14 storm could cause SD card timeouts.
15 ---
16 drivers/usb/host/dwc_otg/dwc_otg_hcd_intr.c | 3 +--
17 1 file changed, 1 insertion(+), 2 deletions(-)
18
19 --- a/drivers/usb/host/dwc_otg/dwc_otg_hcd_intr.c
20 +++ b/drivers/usb/host/dwc_otg/dwc_otg_hcd_intr.c
21 @@ -1857,8 +1857,7 @@ static int32_t handle_hc_nak_intr(dwc_ot
22 */
23 switch(dwc_otg_hcd_get_pipe_type(&qtd->urb->pipe_info)) {
24 case UE_BULK:
25 - //case UE_INTERRUPT:
26 - //case UE_CONTROL:
27 + case UE_CONTROL:
28 if (nak_holdoff_enable)
29 hc->qh->nak_frame = dwc_otg_hcd_get_frame_number(hcd);
30 }