Merge tag 'usb-fixes-v5.10-rc5' of...

Merge tag 'usb-fixes-v5.10-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/peter.chen/usb into usb-linus

Peter writes:

Two bugs for Cadence USB3 gadget driver
- TD_SIZE entry at descriptor is error for multiple-trb use case
- Possible use uninitialized variables

* tag 'usb-fixes-v5.10-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/peter.chen/usb:
  usb: cdns3: gadget: calculate TD_SIZE based on TD
  usb: cdns3: gadget: initialize link_trb as NULL

drivers/usb/cdns3/gadget.c

@@ -1114,7 +1114,7 @@ static int cdns3_ep_run_transfer(struct cdns3_endpoint *priv_ep,
 	struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
 	struct cdns3_request *priv_req;
 	struct cdns3_trb *trb;
-	struct cdns3_trb *link_trb;
+	struct cdns3_trb *link_trb = NULL;
 	dma_addr_t trb_dma;
 	u32 togle_pcs = 1;
 	int sg_iter = 0;
@@ -1193,10 +1193,20 @@ static int cdns3_ep_run_transfer(struct cdns3_endpoint *priv_ep,
 
 	/* set incorrect Cycle Bit for first trb*/
 	control = priv_ep->pcs ? 0 : TRB_CYCLE;
+	trb->length = 0;
+	if (priv_dev->dev_ver >= DEV_VER_V2) {
+		u16 td_size;
+
+		td_size = DIV_ROUND_UP(request->length,
+				       priv_ep->endpoint.maxpacket);
+		if (priv_dev->gadget.speed == USB_SPEED_SUPER)
+			trb->length = TRB_TDL_SS_SIZE(td_size);
+		else
+			control |= TRB_TDL_HS_SIZE(td_size);
+	}
 
 	do {
 		u32 length;
-		u16 td_size = 0;
 
 		/* fill TRB */
 		control |= TRB_TYPE(TRB_NORMAL);
@@ -1208,20 +1218,12 @@ static int cdns3_ep_run_transfer(struct cdns3_endpoint *priv_ep,
 			length = request->length;
 		}
 
-		if (likely(priv_dev->dev_ver >= DEV_VER_V2))
-			td_size = DIV_ROUND_UP(length,
-					       priv_ep->endpoint.maxpacket);
-		else if (priv_ep->flags & EP_TDLCHK_EN)
+		if (priv_ep->flags & EP_TDLCHK_EN)
 			total_tdl += DIV_ROUND_UP(length,
 					       priv_ep->endpoint.maxpacket);
 
-		trb->length = cpu_to_le32(TRB_BURST_LEN(priv_ep->trb_burst_size) |
+		trb->length |= cpu_to_le32(TRB_BURST_LEN(priv_ep->trb_burst_size) |
 					TRB_LEN(length));
-		if (priv_dev->gadget.speed == USB_SPEED_SUPER)
-			trb->length |= cpu_to_le32(TRB_TDL_SS_SIZE(td_size));
-		else
-			control |= TRB_TDL_HS_SIZE(td_size);
-
 		pcs = priv_ep->pcs ? TRB_CYCLE : 0;
 
 		/*