1 files changed, 20 insertions, 4 deletions

diff --git a/drivers/usb/host/ohci-hub.c b/drivers/usb/host/ohci-hub.c
index e01e77bc324b..72e3b12a1926 100644
--- a/drivers/usb/host/ohci-hub.c
+++ b/drivers/usb/host/ohci-hub.c
@@ -53,6 +53,11 @@ static int ohci_bus_suspend (struct usb_hcd *hcd)
 
         spin_lock_irqsave (&ohci->lock, flags);
 
+        if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))) {
+                spin_unlock_irqrestore (&ohci->lock, flags);
+                return -ESHUTDOWN;
+        }
+
         ohci->hc_control = ohci_readl (ohci, &ohci->regs->control);
         switch (ohci->hc_control & OHCI_CTRL_HCFS) {
         case OHCI_USB_RESUME:
@@ -140,11 +145,19 @@ static int ohci_bus_resume (struct usb_hcd *hcd)
         struct ohci_hcd         *ohci = hcd_to_ohci (hcd);
         u32                     temp, enables;
         int                     status = -EINPROGRESS;
+        unsigned long           flags;
 
         if (time_before (jiffies, ohci->next_statechange))
                 msleep(5);
 
-        spin_lock_irq (&ohci->lock);
+        spin_lock_irqsave (&ohci->lock, flags);
+
+        if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))) {
+                spin_unlock_irqrestore (&ohci->lock, flags);
+                return -ESHUTDOWN;
+        }
+
+
         ohci->hc_control = ohci_readl (ohci, &ohci->regs->control);
 
         if (ohci->hc_control & (OHCI_CTRL_IR | OHCI_SCHED_ENABLES)) {
@@ -179,7 +192,7 @@ static int ohci_bus_resume (struct usb_hcd *hcd)
                 ohci_dbg (ohci, "lost power\n");
                 status = -EBUSY;
         }
-        spin_unlock_irq (&ohci->lock);
+        spin_unlock_irqrestore (&ohci->lock, flags);
         if (status == -EBUSY) {
                 (void) ohci_init (ohci);
                 return ohci_restart (ohci);
@@ -297,8 +310,8 @@ ohci_hub_status_data (struct usb_hcd *hcd, char *buf)
         /* handle autosuspended root:  finish resuming before
          * letting khubd or root hub timer see state changes.
          */
-        if ((ohci->hc_control & OHCI_CTRL_HCFS) != OHCI_USB_OPER
-                        || !HC_IS_RUNNING(hcd->state)) {
+        if (unlikely((ohci->hc_control & OHCI_CTRL_HCFS) != OHCI_USB_OPER
+                     || !HC_IS_RUNNING(hcd->state))) {
                 can_suspend = 0;
                 goto done;
         }
@@ -508,6 +521,9 @@ static int ohci_hub_control (
         u32             temp;
         int             retval = 0;
 
+        if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)))
+                return -ESHUTDOWN;
+
         switch (typeReq) {
         case ClearHubFeature:
                 switch (wValue) {