hcd-pci.c in usbcore contains a check for wakeup requests racing with
controller suspend. This check is going to be moved out of usbcore
and into the individual controller drivers, where it can apply to all
platforms, not just PCI.
This patch adds the check to ehci-hcd.
Signed-off-by: Alan Stern <st...@rowland.harvard.edu>
---
[as1729]
drivers/usb/host/ehci-hcd.c | 8 ++++++++
1 file changed, 8 insertions(+)
Index: usb-3.12/drivers/usb/host/ehci-hcd.c
===================================================================
--- usb-3.12.orig/drivers/usb/host/ehci-hcd.c
+++ usb-3.12/drivers/usb/host/ehci-hcd.c
@@ -1095,6 +1095,14 @@ int ehci_suspend(struct usb_hcd *hcd, bo
clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
spin_unlock_irq(&ehci->lock);
+ synchronize_irq(hcd->irq);
+
+ /* Check for race with a wakeup request */
+ if (do_wakeup && HCD_WAKEUP_PENDING(hcd)) {
+ ehci_resume(hcd, false);
+ return -EBUSY;
+ }
+
return 0;
}
EXPORT_SYMBOL_GPL(ehci_suspend);
--
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