When xHCI controller hibernated, the root hub lost power, if controller
support Port Power Control (PPC), PP is not set at xhci_resume() and
set by hub_reset_resume() later, so no need check pending port event.
If PPC is not supported, device is disconneced, seems do not send out
U3 LFPS wake signal, no need re-check again and drop 120ms delay to
save resume time.
Reported-by: Yun-Chien Yu <redacted>
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
---
drivers/usb/host/xhci.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index f3dabd02382c..a7a2bf5bc208 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -1235,7 +1235,7 @@ int xhci_resume(struct xhci_hcd *xhci, bool hibernated)
* the first wake signalling failed, give it that chance.
*/
pending_portevent = xhci_pending_portevent(xhci);
- if (!pending_portevent) {
+ if (!pending_portevent && !hibernated) {
msleep(120);
pending_portevent = xhci_pending_portevent(xhci);
}--
2.18.0