diff options
| author | Thinh Nguyen <Thinh.Nguyen@synopsys.com> | 2020-03-31 01:40:42 -0700 |
|---|---|---|
| committer | Felipe Balbi <balbi@kernel.org> | 2020-05-25 11:09:36 +0300 |
| commit | d9feef974e0d8cb6842533c92476a1b32a41ba31 (patch) | |
| tree | 61ca1233318d23bc8bcb8daaaeb01b46073d165f /drivers/usb/dwc3 | |
| parent | ac82b56bda5fe8a851b8ab18df380d74e9b7fca2 (diff) | |
usb: dwc3: gadget: Continue to process pending requests
If there are still pending requests because no TRB was available,
prepare more when started requests are completed.
Introduce dwc3_gadget_ep_should_continue() to check for incomplete and
pending requests to resume updating new TRBs to the controller's TRB
cache.
Signed-off-by: Thinh Nguyen <thinhn@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
Diffstat (limited to 'drivers/usb/dwc3')
| -rw-r--r-- | drivers/usb/dwc3/gadget.c | 24 |
1 files changed, 21 insertions, 3 deletions
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index a0555252dee0..20b593ea140f 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2600,10 +2600,8 @@ static int dwc3_gadget_ep_cleanup_completed_request(struct dwc3_ep *dep, req->request.actual = req->request.length - req->remaining; - if (!dwc3_gadget_ep_request_completed(req)) { - __dwc3_gadget_kick_transfer(dep); + if (!dwc3_gadget_ep_request_completed(req)) goto out; - } dwc3_gadget_giveback(dep, req, status); @@ -2627,6 +2625,24 @@ static void dwc3_gadget_ep_cleanup_completed_requests(struct dwc3_ep *dep, } } +static bool dwc3_gadget_ep_should_continue(struct dwc3_ep *dep) +{ + struct dwc3_request *req; + + if (!list_empty(&dep->pending_list)) + return true; + + /* + * We only need to check the first entry of the started list. We can + * assume the completed requests are removed from the started list. + */ + req = next_request(&dep->started_list); + if (!req) + return false; + + return !dwc3_gadget_ep_request_completed(req); +} + static void dwc3_gadget_endpoint_frame_from_event(struct dwc3_ep *dep, const struct dwc3_event_depevt *event) { @@ -2656,6 +2672,8 @@ static void dwc3_gadget_endpoint_transfer_in_progress(struct dwc3_ep *dep, if (stop) dwc3_stop_active_transfer(dep, true, true); + else if (dwc3_gadget_ep_should_continue(dep)) + __dwc3_gadget_kick_transfer(dep); /* * WORKAROUND: This is the 2nd half of U1/U2 -> U0 workaround. |