diff options
Diffstat (limited to 'drivers/usb/host/ehci-hub.c')
| -rw-r--r-- | drivers/usb/host/ehci-hub.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/drivers/usb/host/ehci-hub.c b/drivers/usb/host/ehci-hub.c index 2c6571c05f35..c75d9270c752 100644 --- a/drivers/usb/host/ehci-hub.c +++ b/drivers/usb/host/ehci-hub.c @@ -120,9 +120,26 @@ static int ehci_bus_suspend (struct usb_hcd *hcd) del_timer_sync(&ehci->watchdog); del_timer_sync(&ehci->iaa_watchdog); - port = HCS_N_PORTS (ehci->hcs_params); spin_lock_irq (&ehci->lock); + /* Once the controller is stopped, port resumes that are already + * in progress won't complete. Hence if remote wakeup is enabled + * for the root hub and any ports are in the middle of a resume or + * remote wakeup, we must fail the suspend. + */ + if (hcd->self.root_hub->do_remote_wakeup) { + port = HCS_N_PORTS(ehci->hcs_params); + while (port--) { + if (ehci->reset_done[port] != 0) { + spin_unlock_irq(&ehci->lock); + ehci_dbg(ehci, "suspend failed because " + "port %d is resuming\n", + port + 1); + return -EBUSY; + } + } + } + /* stop schedules, clean any completed work */ if (HC_IS_RUNNING(hcd->state)) { ehci_quiesce (ehci); @@ -138,6 +155,7 @@ static int ehci_bus_suspend (struct usb_hcd *hcd) */ ehci->bus_suspended = 0; ehci->owned_ports = 0; + port = HCS_N_PORTS(ehci->hcs_params); while (port--) { u32 __iomem *reg = &ehci->regs->port_status [port]; u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; |