USB: HCDs use the do_remote_wakeup flag

When a USB device is suspended, whether or not it is enabled for
remote wakeup depends on the device_may_wakeup() setting.  The setting
is then saved in the do_remote_wakeup flag.

Later on, however, the device_may_wakeup() value can change because of
user activity.  So when testing whether a suspended device is or
should be enabled for remote wakeup, we should always test
do_remote_wakeup instead of device_may_wakeup().  This patch (as1076)
makes that change for root hubs in several places.

The patch also adjusts uhci-hcd so that when an autostopped controller
is suspended, the remote wakeup setting agrees with the value recorded
in the root hub's do_remote_wakeup flag.

And the patch adjusts ehci-hcd so that wakeup events on selectively
suspended ports (i.e., the bus itself isn't suspended) don't turn on
the PME# wakeup signal.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 2 insertions, 3 deletions

diff --git a/drivers/usb/host/ohci-hub.c b/drivers/usb/host/ohci-hub.c
index 28d6d775eb5f..cf3e1d255639 100644
--- a/drivers/usb/host/ohci-hub.c
+++ b/drivers/usb/host/ohci-hub.c
@@ -103,10 +103,9 @@ __acquires(ohci->lock)
 	finish_unlinks (ohci, ohci_frame_no(ohci));
 
 	/* maybe resume can wake root hub */
-	if (device_may_wakeup(&ohci_to_hcd(ohci)->self.root_hub->dev) ||
-			autostop)
+	if (ohci_to_hcd(ohci)->self.root_hub->do_remote_wakeup || autostop) {
 		ohci->hc_control |= OHCI_CTRL_RWE;
-	else {
+	} else {
 		ohci_writel (ohci, OHCI_INTR_RHSC, &ohci->regs->intrdisable);
 		ohci->hc_control &= ~OHCI_CTRL_RWE;
 	}