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usb: dwc3: gadget: fix pending isoc handling

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If xfernotready is received and there is no request in request_list then
REQUEST_PENDING flag must be set, so that next request in ep queue is executed.

In case of isoc transfer, if xfernotready is already elapsed and even first
request has not been queued to request_list, then issue END TRANSFER, so that
you can receive xfernotready again and can have notion of current microframe.

Signed-off-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Pratyush Anand 2012-08-30 12:21:43 +05:30 committed by Felipe Balbi
parent 77975eec14
commit f4a53c5511
1 changed files with 12 additions and 0 deletions
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12
drivers/usb/dwc3/gadget.c
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@ -1029,6 +1029,7 @@ static void __dwc3_gadget_start_isoc(struct dwc3 *dwc,
if (list_empty(&dep->request_list)) {
dev_vdbg(dwc->dev, "ISOC ep %s run out for requests.\n",
dep->name);
dep->flags |= DWC3_EP_PENDING_REQUEST;
return;
}
@ -1092,6 +1093,17 @@ static int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req)
if (dep->flags & DWC3_EP_PENDING_REQUEST) {
int ret;
/*
* If xfernotready is already elapsed and it is a case
* of isoc transfer, then issue END TRANSFER, so that
* you can receive xfernotready again and can have
* notion of current microframe.
*/
if (usb_endpoint_xfer_isoc(dep->endpoint.desc)) {
dwc3_stop_active_transfer(dwc, dep->number);
return 0;
}
ret = __dwc3_gadget_kick_transfer(dep, 0, true);
if (ret && ret != -EBUSY) {
struct dwc3 *dwc = dep->dwc;