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USB: HCDs use the do_remote_wakeup flag

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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>
This commit is contained in:
Alan Stern
2008-04-14 12:17:10 -04:00
committed by Greg Kroah-Hartman
parent b950bdbc67
commit 58a97ffeb2
6 changed files with 18 additions and 30 deletions
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2
drivers/usb/host/isp116x-hcd.c
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@@ -1400,7 +1400,7 @@ static int isp116x_bus_suspend(struct usb_hcd *hcd)
spin_unlock_irqrestore(&isp116x->lock, flags);
val &= (~HCCONTROL_HCFS & ~HCCONTROL_RWE);
val |= HCCONTROL_USB_SUSPEND;
if (device_may_wakeup(&hcd->self.root_hub->dev))
if (hcd->self.root_hub->do_remote_wakeup)
val |= HCCONTROL_RWE;
/* Wait for usb transfers to finish */
msleep(2);