xHC system resume time may increase due to a 120ms delay. A PME# signal
will trigger the xHC host to resume runtime, and the host must wait for a
missed U3 LFPS wake signal before re-checking for port activity. It may
be necessary to wait only for auto-resume cases. Add a check only for
runtime resume to avoid the delay for other PM events so that the resume
time can be improved.
Fixes: 253f588c70f6 ("xhci: Improve detection of device initiated wake signal.")
Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@xxxxxxx>
---
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 a539e4dd54f7..a3ee80ee5d1e 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -1315,7 +1315,7 @@ int xhci_resume(struct xhci_hcd *xhci, int event)
* the first wake signalling failed, give it that chance.
*/
pending_portevent = xhci_pending_portevent(xhci);
- if (!pending_portevent) {
+ if (!pending_portevent && event == PM_EVENT_AUTO_RESUME) {
msleep(120);
pending_portevent = xhci_pending_portevent(xhci);
}
--
2.25.1
