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usb: dwc3: gadget: issue ENDTRANSFER conditional on resource_index

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Because of recent changes to transfer handling on
DWC3, we will not get XferComplete unless we
completely fill up our TRB ring. This means that we
might get a Reset or Disconnect without getting a
XferComplete first.

In order to correctly release our allocated Transfer
Resource, we must issue ENDTRANSFER command whenever
dep->resource_index is valid.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Felipe Balbi 2016-06-21 10:32:02 +03:00
parent 328082376a
commit 0e146028ee
1 changed files with 5 additions and 15 deletions
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20
drivers/usb/dwc3/gadget.c
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@ -607,24 +607,14 @@ static void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum, bool force);
static void dwc3_remove_requests(struct dwc3 *dwc, struct dwc3_ep *dep)
{
struct dwc3_request *req;
struct dwc3_trb *current_trb;
unsigned transfer_in_flight;
if (dep->number > 1)
current_trb = &dep->trb_pool[dep->trb_enqueue];
else
current_trb = &dwc->ep0_trb[dep->trb_enqueue];
transfer_in_flight = current_trb->ctrl & DWC3_TRB_CTRL_HWO;
dwc3_stop_active_transfer(dwc, dep->number, true);
if (transfer_in_flight && !list_empty(&dep->started_list)) {
dwc3_stop_active_transfer(dwc, dep->number, true);
/* - giveback all requests to gadget driver */
while (!list_empty(&dep->started_list)) {
req = next_request(&dep->started_list);
/* - giveback all requests to gadget driver */
while (!list_empty(&dep->started_list)) {
req = next_request(&dep->started_list);
dwc3_gadget_giveback(dep, req, -ESHUTDOWN);
}
dwc3_gadget_giveback(dep, req, -ESHUTDOWN);
}
while (!list_empty(&dep->pending_list)) {