usb: dwc3: ep0: return early on NULL requests
if our list of requests is empty, return early.
There's really nothing to be done in case our
request list is empty anyway because the only
situation where we our list is empty, is when
we're transferring ZLPs.
Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c
index ae6b575..a47cc1e 100644
--- a/drivers/usb/dwc3/ep0.c
+++ b/drivers/usb/dwc3/ep0.c
@@ -789,9 +789,6 @@
dwc->ep0_next_event = DWC3_EP0_NRDY_STATUS;
- r = next_request(&ep0->request_list);
- ur = &r->request;
-
trb = dwc->ep0_trb;
status = DWC3_TRB_SIZE_TRBSTS(trb->size);
@@ -804,6 +801,12 @@
return;
}
+ r = next_request(&ep0->request_list);
+ if (!r)
+ return;
+
+ ur = &r->request;
+
length = trb->size & DWC3_TRB_SIZE_MASK;
if (dwc->ep0_bounced) {