From 6d3607b179804e8ff4e2a1304ee238a4f6dc035c Mon Sep 17 00:00:00 2001 From: Andiry Xu Date: Fri, 23 Sep 2011 14:19:50 -0700 Subject: xHCI: Clear PLC for USB2 root hub ports commit 6fd4562178508a0949c9fdecd8558d8b10d671bd upstream. When the link state changes, xHC will report a port status change event and set the PORT_PLC bit, for both USB3 and USB2 root hub ports. The PLC will be cleared by usbcore for USB3 root hub ports, but not for USB2 ports, because they do not report USB_PORT_STAT_C_LINK_STATE in wPortChange. Clear it for USB2 root hub ports in handle_port_status(). Signed-off-by: Andiry Xu Signed-off-by: Sarah Sharp Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/xhci-ring.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers') diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c index cbf7ed0..b20d2f7 100644 --- a/drivers/usb/host/xhci-ring.c +++ b/drivers/usb/host/xhci-ring.c @@ -1359,6 +1359,10 @@ static void handle_port_status(struct xhci_hcd *xhci, } } + if (hcd->speed != HCD_USB3) + xhci_test_and_clear_bit(xhci, port_array, faked_port_index, + PORT_PLC); + cleanup: /* Update event ring dequeue pointer before dropping the lock */ inc_deq(xhci, xhci->event_ring, true); -- cgit v1.1