UPSTREAM: usb: dwc3: gadget: return 0 if we try to Wakeup in superspeed

Instead of returning -EINVAL when someone calls
__dwc3_gadget_wakeup() in speeds > highspeed, let's
return 0. There are no problems for the driver for
calling it in superspeed as we cleanly just return.

This avoids an annoying WARN_ONCE() always
triggering during superspeed enumeration with LPM
enabled.

Change-Id: Iff35ee46a782684db1c2339ad71a73a303cb3a89
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Wu Liang feng <wulf@rock-chips.com>
(cherry picked from commit 6b74289937f624439c87135cfabb3deb2955fb53)

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index ad130fbd30f15f869652bff3a636ec4d9d0c055d..5be65bd6667a68511ede6e8f81b08bf0fd1173cf 100644 (file)
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -1441,7 +1441,7 @@ static int __dwc3_gadget_wakeup(struct dwc3 *dwc)
        speed = reg & DWC3_DSTS_CONNECTSPD;
        if (speed == DWC3_DSTS_SUPERSPEED) {
                dwc3_trace(trace_dwc3_gadget, "no wakeup on SuperSpeed\n");
-               return -EINVAL;
+               return 0;
        }
 
        link_state = DWC3_DSTS_USBLNKST(reg);