openwrtv3/target/linux/brcm2708/patches-4.9/950-0150-dwc_otg-fix-summarize-urb-actual_length-for-isochron.patch
Rafał Miłecki fce21ae4cc brcm2708: rename all patches from raspberrypi git tree to use 950 prefix
Right now all brcm2708 patches are extracted from the non-mainline
raspberrypi/linux git tree. Many of them are hacks and/or are unneeded
in LEDE. Raspberry Pi is getting better and better mainline support so
it would be nice to finally start maintaining patches in a cleaner way:
1) Backport patches accepted in upstream tree
2) Start using upstream drivers
3) Pick only these patches that are needed for more complete support

Handling above tasks requires grouping patches - ideally using the same
prefixes as generic ones. It means we should rename existing patches to
use some high prefix. This will allow e.g. use 0xx for backported code.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Stijn Tintel <stijn@linux-ipv6.be>
2017-03-24 08:06:35 +01:00

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1.1 KiB
Diff

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