diff options
Diffstat (limited to 'target/linux/brcm2708/patches-3.10/0093-dwc_otg-Enable-NAK-holdoff-for-control-split-transac.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-3.10/0093-dwc_otg-Enable-NAK-holdoff-for-control-split-transac.patch | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-3.10/0093-dwc_otg-Enable-NAK-holdoff-for-control-split-transac.patch b/target/linux/brcm2708/patches-3.10/0093-dwc_otg-Enable-NAK-holdoff-for-control-split-transac.patch new file mode 100644 index 0000000000..827917a024 --- /dev/null +++ b/target/linux/brcm2708/patches-3.10/0093-dwc_otg-Enable-NAK-holdoff-for-control-split-transac.patch @@ -0,0 +1,30 @@ +From 3d8a3a5cbcd4d36768cf53e778d8165aefabd5b0 Mon Sep 17 00:00:00 2001 +From: P33M <P33M@github.com> +Date: Fri, 20 Sep 2013 16:08:27 +0100 +Subject: [PATCH 093/174] dwc_otg: Enable NAK holdoff for control split + transactions + +Certain low-speed devices take a very long time to complete a +data or status stage of a control transaction, producing NAK +responses until they complete internal processing - the USB2.0 +spec limit is up to 500mS. This causes the same type of interrupt +storm as seen with USB-serial dongles prior to c8edb238. + +In certain circumstances, usually while booting, this interrupt +storm could cause SD card timeouts. +--- + drivers/usb/host/dwc_otg/dwc_otg_hcd_intr.c | 3 +-- + 1 file changed, 1 insertion(+), 2 deletions(-) + +--- a/drivers/usb/host/dwc_otg/dwc_otg_hcd_intr.c ++++ b/drivers/usb/host/dwc_otg/dwc_otg_hcd_intr.c +@@ -1857,8 +1857,7 @@ static int32_t handle_hc_nak_intr(dwc_ot + */ + switch(dwc_otg_hcd_get_pipe_type(&qtd->urb->pipe_info)) { + case UE_BULK: +- //case UE_INTERRUPT: +- //case UE_CONTROL: ++ case UE_CONTROL: + if (nak_holdoff_enable) + hc->qh->nak_frame = dwc_otg_hcd_get_frame_number(hcd); + } |