| Message ID | 20211025114209.4047-1-chunfeng.yun@mediatek.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [RFC] usb: xhci: skip re-check pending port event if hibernated | expand |
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); }
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 <yun-chien.yu@mediatek.com> Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com> --- drivers/usb/host/xhci.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)