Commit d97cc2f2 authored by David Brownell's avatar David Brownell Committed by Greg Kroah-Hartman
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[PATCH] USB: ehci fix driver model wakeup flags

On some systems, EHCI seems to be getting IRQs too early during driver
setup ... before the root hub is allocated, in particular, making trouble
for any code chasing down root hub pointers!  In this case, it seems to
be safe to just ignore the root hub setting.  Thanks to Rafael J. Wysocki
for getting this properly tested.

Signed-off-by: default avatarDavid Brownell <>
Signed-off-by: default avatarGreg Kroah-Hartman <>
parent 2c1c3c4c
......@@ -624,7 +624,7 @@ static irqreturn_t ehci_irq (struct usb_hcd *hcd, struct pt_regs *regs)
/* remote wakeup [4.3.1] */
if ((status & STS_PCD) && device_may_wakeup(&hcd->self.root_hub->dev)) {
if (status & STS_PCD) {
unsigned i = HCS_N_PORTS (ehci->hcs_params);
/* resume root hub? */
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