commit 399fdf9e57457444bbb5ab33eefa1f8723e9ea05
author Paul Zimmerman <Paul.Zimmerman@synopsys.com> Sat Jul 13 14:53:50 2013 -0700
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> Tue Jul 23 14:54:48 2013 -0700
tree 29dc57a066a01ffdc959aa6a2080ef2f4e9665e1
parent c9e1c907ff520bdc01170a8d6461d262094ed6f8

staging: dwc2: optimize dwc2_hc_handle_tt_clear() a bit

Make dwc2_hc_handle_tt_clear() return early if the device is
hi-speed.

Signed-off-by: Paul Zimmerman <paulz@synopsys.com>
Tested-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/dwc2/hcd_intr.c

diff --git a/drivers/staging/dwc2/hcd_intr.c b/drivers/staging/dwc2/hcd_intr.c
index 22836f5..093a75c 100644
--- a/drivers/staging/dwc2/hcd_intr.c
+++ b/drivers/staging/dwc2/hcd_intr.c
@@ -89,15 +89,20 @@
 {
 	struct urb *usb_urb;
 
-	if (!chan->qh || !qtd->urb)
+	if (!chan->qh)
+		return;
+
+	if (chan->qh->dev_speed == USB_SPEED_HIGH)
+		return;
+
+	if (!qtd->urb)
 		return;
 
 	usb_urb = qtd->urb->priv;
-	if (!usb_urb || !usb_urb->dev)
+	if (!usb_urb || !usb_urb->dev || !usb_urb->dev->tt)
 		return;
 
-	if (chan->qh->dev_speed != USB_SPEED_HIGH &&
-	    qtd->urb->status != -EPIPE && qtd->urb->status != -EREMOTEIO) {
+	if (qtd->urb->status != -EPIPE && qtd->urb->status != -EREMOTEIO) {
 		chan->qh->tt_buffer_dirty = 1;
 		if (usb_hub_clear_tt_buffer(usb_urb))
 			/* Clear failed; let's hope things work anyway */