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usb: dwc3: gadget: move requests to cancelled_list 

Whenever we have a request in flight, we can move it to the cancelled
list and later simply iterate over that list and skip over any TRBs we
find.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Felipe Balbi 2018-08-01 13:54:25 +03:00
parent d5443bbf5f
commit d4f1afe5e8
1 changed files with 14 additions and 3 deletions
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17
drivers/usb/dwc3/gadget.c
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@ -1498,6 +1498,17 @@ static void dwc3_gadget_ep_skip_trbs(struct dwc3_ep *dep, struct dwc3_request *r
}
}
static void dwc3_gadget_ep_cleanup_cancelled_requests(struct dwc3_ep *dep)
{
struct dwc3_request *req;
struct dwc3_request *tmp;
list_for_each_entry_safe(req, tmp, &dep->cancelled_list, list) {
dwc3_gadget_ep_skip_trbs(dep, req);
dwc3_gadget_giveback(dep, req, -ECONNRESET);
}
}
static int dwc3_gadget_ep_dequeue(struct usb_ep *ep,
struct usb_request *request)
{
@ -1534,8 +1545,9 @@ static int dwc3_gadget_ep_dequeue(struct usb_ep *ep,
if (!r->trb)
goto out0;
dwc3_gadget_ep_skip_trbs(dep, r);
goto out1;
dwc3_gadget_move_cancelled_request(req);
dwc3_gadget_ep_cleanup_cancelled_requests(dep);
goto out0;
}
dev_err(dwc->dev, "request %pK was not queued to %s\n",
request, ep->name);
@ -1543,7 +1555,6 @@ static int dwc3_gadget_ep_dequeue(struct usb_ep *ep,
goto out0;
}
out1:
dwc3_gadget_giveback(dep, req, -ECONNRESET);
out0: