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usb: dwc3: gadget: move requests to cancelled_list

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commit d4f1afe5e8 upstream

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.

Cc: Fei Yang <fei.yang@intel.com>
Cc: Sam Protsenko <semen.protsenko@linaro.org>
Cc: Felipe Balbi <balbi@kernel.org>
Cc: linux-usb@vger.kernel.org
Cc: stable@vger.kernel.org # 4.19.y
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
(cherry picked from commit d4f1afe5e8)
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Felipe Balbi
2019-06-28 18:24:11 +00:00
committed by Greg Kroah-Hartman
parent bba5f9878f
commit d7ff2e3ff0
1 changed files with 14 additions and 3 deletions
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17
drivers/usb/dwc3/gadget.c
View File

@@ -1364,6 +1364,17 @@ 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)
{
@@ -1400,8 +1411,9 @@ 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);
@@ -1409,7 +1421,6 @@ static int dwc3_gadget_ep_dequeue(struct usb_ep *ep,
goto out0;
}
out1:
dwc3_gadget_giveback(dep, req, -ECONNRESET);
out0: