USB: EHCI: Fix resume signalling on remote wakeup

commit 47a64a13d54f6c669b00542848d5550be3d3310e upstream.

Set the ehci->resuming flag for the port we receive a remote
wakeup on so that resume signalling can be completed.

Without this, the root hub timer will not fire again to check
if the resume was completed and there will be a never-ending wait on
on the port.

This effect is only observed if the HUB IRQ IN does not come after we
have initiated the port resume.

Signed-off-by: Roger Quadros <rogerq@ti.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/host/ehci-hub.c b/drivers/usb/host/ehci-hub.c
index 9ab4a4d9768a5a3ed3fa791746e01977445ba840..ca6289b4b7ade64a5387dec6f8bb2ba025e7f0cf 100644 (file)
--- a/drivers/usb/host/ehci-hub.c
+++ b/drivers/usb/host/ehci-hub.c
@@ -858,6 +858,7 @@ static int ehci_hub_control (
                                ehci->reset_done[wIndex] = jiffies
                                                + msecs_to_jiffies(20);
                                usb_hcd_start_port_resume(&hcd->self, wIndex);
+                               set_bit(wIndex, &ehci->resuming_ports);
                                /* check the port again */
                                mod_timer(&ehci_to_hcd(ehci)->rh_timer,
                                                ehci->reset_done[wIndex]);