diff options
Diffstat (limited to 'drivers/usb/host/ehci-hub.c')
| -rw-r--r-- | drivers/usb/host/ehci-hub.c | 27 |
1 files changed, 23 insertions, 4 deletions
diff --git a/drivers/usb/host/ehci-hub.c b/drivers/usb/host/ehci-hub.c index ffc5f27..c788022 100644 --- a/drivers/usb/host/ehci-hub.c +++ b/drivers/usb/host/ehci-hub.c @@ -221,6 +221,8 @@ static int ehci_bus_suspend (struct usb_hcd *hcd) ehci_quiesce(ehci); spin_lock_irq (&ehci->lock); + if (ehci->rh_state < EHCI_RH_RUNNING) + goto done; /* Once the controller is stopped, port resumes that are already * in progress won't complete. Hence if remote wakeup is enabled @@ -306,6 +308,10 @@ static int ehci_bus_suspend (struct usb_hcd *hcd) ehci_halt (ehci); spin_lock_irq(&ehci->lock); + if (ehci->enabled_hrtimer_events & BIT(EHCI_HRTIMER_POLL_DEAD)) + ehci_handle_controller_death(ehci); + if (ehci->rh_state != EHCI_RH_RUNNING) + goto done; ehci->rh_state = EHCI_RH_SUSPENDED; end_unlink_async(ehci); @@ -320,6 +326,7 @@ static int ehci_bus_suspend (struct usb_hcd *hcd) ehci_writel(ehci, mask, &ehci->regs->intr_enable); ehci_readl(ehci, &ehci->regs->intr_enable); + done: ehci->next_statechange = jiffies + msecs_to_jiffies(10); ehci->enabled_hrtimer_events = 0; ehci->next_hrtimer_event = EHCI_HRTIMER_NO_EVENT; @@ -342,10 +349,8 @@ static int ehci_bus_resume (struct usb_hcd *hcd) if (time_before (jiffies, ehci->next_statechange)) msleep(5); spin_lock_irq (&ehci->lock); - if (!HCD_HW_ACCESSIBLE(hcd)) { - spin_unlock_irq(&ehci->lock); - return -ESHUTDOWN; - } + if (!HCD_HW_ACCESSIBLE(hcd) || ehci->shutdown) + goto shutdown; if (unlikely(ehci->debug)) { if (!dbgp_reset_prep()) @@ -384,6 +389,8 @@ static int ehci_bus_resume (struct usb_hcd *hcd) spin_unlock_irq(&ehci->lock); msleep(8); spin_lock_irq(&ehci->lock); + if (ehci->shutdown) + goto shutdown; /* clear phy low-power mode before resume */ if (ehci->bus_suspended && ehci->has_hostpc) { @@ -401,6 +408,8 @@ static int ehci_bus_resume (struct usb_hcd *hcd) spin_unlock_irq(&ehci->lock); msleep(5); spin_lock_irq(&ehci->lock); + if (ehci->shutdown) + goto shutdown; } /* manually resume the ports we suspended during bus_suspend() */ @@ -421,6 +430,8 @@ static int ehci_bus_resume (struct usb_hcd *hcd) spin_unlock_irq(&ehci->lock); msleep(20); spin_lock_irq(&ehci->lock); + if (ehci->shutdown) + goto shutdown; } i = HCS_N_PORTS (ehci->hcs_params); @@ -439,10 +450,18 @@ static int ehci_bus_resume (struct usb_hcd *hcd) ehci_handover_companion_ports(ehci); /* Now we can safely re-enable irqs */ + spin_lock_irq(&ehci->lock); + if (ehci->shutdown) + goto shutdown; ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable); (void) ehci_readl(ehci, &ehci->regs->intr_enable); + spin_unlock_irq(&ehci->lock); return 0; + + shutdown: + spin_unlock_irq(&ehci->lock); + return -ESHUTDOWN; } #else |
