summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorJohn Youn <John.Youn@synopsys.com>2001-09-17 00:00:00 -0700
committerFelipe Balbi <balbi@ti.com>2015-07-22 08:52:42 -0500
commitaebda618718157a69c0dc0adb978d69bc2b8723c (patch)
treefec951eae8a5e725e36451b11e23ad66dc327916
parent7ace8fc8219e4cbbfd5b4790390d9a01a2541cdf (diff)
downloadop-kernel-dev-aebda618718157a69c0dc0adb978d69bc2b8723c.zip
op-kernel-dev-aebda618718157a69c0dc0adb978d69bc2b8723c.tar.gz
usb: dwc3: Reset the transfer resource index on SET_INTERFACE
This fixes an issue introduced in commit b23c843992b6 (usb: dwc3: gadget: fix DEPSTARTCFG for non-EP0 EPs) that made sure we would only use DEPSTARTCFG once per SetConfig. The trick is that we should use one DEPSTARTCFG per SetConfig *OR* SetInterface. SetInterface was completely missed from the original patch. This problem became aparent after commit 76e838c9f776 (usb: dwc3: gadget: return error if command sent to DEPCMD register fails) added checking of the return status of device endpoint commands. 'Set Endpoint Transfer Resource' command was caught failing occasionally. This is because the Transfer Resource Index was not getting reset during a SET_INTERFACE request. Finally, to fix the issue, was we have to do is make sure that our start_config_issued flag gets reset whenever we receive a SetInterface request. To verify the problem (and its fix), all we have to do is run test 9 from testusb with 'testusb -t 9 -s 2048 -a -c 5000'. Tested-by: Huang Rui <ray.huang@amd.com> Tested-by: Subbaraya Sundeep Bhatta <subbaraya.sundeep.bhatta@xilinx.com> Fixes: b23c843992b6 (usb: dwc3: gadget: fix DEPSTARTCFG for non-EP0 EPs) Cc: <stable@vger.kernel.org> # v3.2+ Signed-off-by: John Youn <johnyoun@synopsys.com> Signed-off-by: Felipe Balbi <balbi@ti.com>
-rw-r--r--drivers/usb/dwc3/ep0.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c
index 2ef3c8d..69e769c 100644
--- a/drivers/usb/dwc3/ep0.c
+++ b/drivers/usb/dwc3/ep0.c
@@ -727,6 +727,10 @@ static int dwc3_ep0_std_request(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl)
dwc3_trace(trace_dwc3_ep0, "USB_REQ_SET_ISOCH_DELAY");
ret = dwc3_ep0_set_isoch_delay(dwc, ctrl);
break;
+ case USB_REQ_SET_INTERFACE:
+ dwc3_trace(trace_dwc3_ep0, "USB_REQ_SET_INTERFACE");
+ dwc->start_config_issued = false;
+ /* Fall through */
default:
dwc3_trace(trace_dwc3_ep0, "Forwarding to gadget driver");
ret = dwc3_ep0_delegate_req(dwc, ctrl);
OpenPOWER on IntegriCloud