usb: dwc3: gadget: make to increment req->remaining in all cases

Sometimes, we might get a completion for a TRB which is left with HWO bit. Even in these cases, we should increment req->remaining to properly report total transferred size. I noticed this while debuggin a separate problem seen with MSC tests from USBCV. Sometimes we would erroneously report a completion for a 512-byte transfer when, in reality, we transferred 0 bytes. Signed-off-by: Felipe Balbi <[email protected]>
tdeneau · Mar 8, 2017 · 35b2719 · 35b2719
1 parent ef5e2fa
commit 35b2719
Showing 1 changed file with 3 additions and 3 deletions.
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
@@ -2189,12 +2189,12 @@ static int __dwc3_cleanup_done_trbs(struct dwc3 *dwc, struct dwc3_ep *dep,
 		return 1;
 	}
 
-	if ((trb->ctrl & DWC3_TRB_CTRL_HWO) && status != -ESHUTDOWN)
-		return 1;
-
 	count = trb->size & DWC3_TRB_SIZE_MASK;
 	req->remaining += count;
 
+	if ((trb->ctrl & DWC3_TRB_CTRL_HWO) && status != -ESHUTDOWN)
+		return 1;
+
 	if (dep->direction) {
 		if (count) {
 			trb_status = DWC3_TRB_SIZE_TRBSTS(trb->size);