diff mbox series

[02/10] usb: dwc3: gadget: Reclaim extra TRBs after request completion

Message ID 326a4b8aa53cd427eec36678c2410c5698b89a13.1600935293.git.Thinh.Nguyen@synopsys.com
State New
Headers show
Series usb: dwc3: gadget: Revise preparation for extra TRBs | expand

Commit Message

Thinh Nguyen Sept. 24, 2020, 8:21 a.m. UTC 
An SG request may be partially completed (due to no available TRBs).
Don't reclaim extra TRBs and clear the needs_extra_trb flag until the
request is fully completed. Otherwise, the driver will reclaim the wrong
TRB.

Cc: stable@vger.kernel.org
Fixes: 1f512119a08c ("usb: dwc3: gadget: add remaining sg entries to ring")
Signed-off-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
---
 drivers/usb/dwc3/gadget.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)
diff mbox series

Patch

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 44351078f833..6017263929f3 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -2738,6 +2738,11 @@  static int dwc3_gadget_ep_cleanup_completed_request(struct dwc3_ep *dep,
 		ret = dwc3_gadget_ep_reclaim_trb_linear(dep, req, event,
 				status);
 
+	req->request.actual = req->request.length - req->remaining;
+
+	if (!dwc3_gadget_ep_request_completed(req))
+		goto out;
+
 	if (req->needs_extra_trb) {
 		unsigned int maxp = usb_endpoint_maxp(dep->endpoint.desc);
 
@@ -2753,11 +2758,6 @@  static int dwc3_gadget_ep_cleanup_completed_request(struct dwc3_ep *dep,
 		req->needs_extra_trb = false;
 	}
 
-	req->request.actual = req->request.length - req->remaining;
-
-	if (!dwc3_gadget_ep_request_completed(req))
-		goto out;
-
 	dwc3_gadget_giveback(dep, req, status);
 
 out: