1 files changed, 22 insertions, 31 deletions

diff --git a/drivers/usb/host/ohci-hub.c b/drivers/usb/host/ohci-hub.c
index 79a78029f89..b56739221d1 100644
--- a/drivers/usb/host/ohci-hub.c
+++ b/drivers/usb/host/ohci-hub.c
@@ -36,6 +36,18 @@
 
 /*-------------------------------------------------------------------------*/
 
+/* hcd->hub_irq_enable() */
+static void ohci_rhsc_enable (struct usb_hcd *hcd)
+{
+        struct ohci_hcd         *ohci = hcd_to_ohci (hcd);
+
+        spin_lock_irq(&ohci->lock);
+        if (!ohci->autostop)
+                del_timer(&hcd->rh_timer);      /* Prevent next poll */
+        ohci_writel(ohci, OHCI_INTR_RHSC, &ohci->regs->intrenable);
+        spin_unlock_irq(&ohci->lock);
+}
+
 #define OHCI_SCHED_ENABLES \
         (OHCI_CTRL_CLE|OHCI_CTRL_BLE|OHCI_CTRL_PLE|OHCI_CTRL_IE)
 
@@ -362,28 +374,18 @@ static int ohci_root_hub_state_changes(struct ohci_hcd *ohci, int changed,
                 int any_connected)
 {
         int     poll_rh = 1;
-        int     rhsc;
 
-        rhsc = ohci_readl(ohci, &ohci->regs->intrenable) & OHCI_INTR_RHSC;
         switch (ohci->hc_control & OHCI_CTRL_HCFS) {
 
         case OHCI_USB_OPER:
-                /* If no status changes are pending, enable status-change
-                 * interrupts.
-                 */
-                if (!rhsc && !changed) {
-                        rhsc = OHCI_INTR_RHSC;
-                        ohci_writel(ohci, rhsc, &ohci->regs->intrenable);
-                }
-
-                /* Keep on polling until we know a device is connected
-                 * and RHSC is enabled, or until we autostop.
-                 */
+                /* keep on polling until we know a device is connected
+                 * and RHSC is enabled */
                 if (!ohci->autostop) {
                         if (any_connected ||
                                         !device_may_wakeup(&ohci_to_hcd(ohci)
                                                 ->self.root_hub->dev)) {
-                                if (rhsc)
+                                if (ohci_readl(ohci, &ohci->regs->intrenable) &
+                                                OHCI_INTR_RHSC)
                                         poll_rh = 0;
                         } else {
                                 ohci->autostop = 1;
@@ -396,13 +398,12 @@ static int ohci_root_hub_state_changes(struct ohci_hcd *ohci, int changed,
                                 ohci->autostop = 0;
                                 ohci->next_statechange = jiffies +
                                                 STATECHANGE_DELAY;
-                        } else if (rhsc && time_after_eq(jiffies,
+                        } else if (time_after_eq(jiffies,
                                                 ohci->next_statechange)
                                         && !ohci->ed_rm_list
                                         && !(ohci->hc_control &
                                                 OHCI_SCHED_ENABLES)) {
                                 ohci_rh_suspend(ohci, 1);
-                                poll_rh = 0;
                         }
                 }
                 break;
@@ -416,12 +417,6 @@ static int ohci_root_hub_state_changes(struct ohci_hcd *ohci, int changed,
                         else
                                 usb_hcd_resume_root_hub(ohci_to_hcd(ohci));
                 } else {
-                        if (!rhsc && (ohci->autostop ||
-                                        ohci_to_hcd(ohci)->self.root_hub->
-                                                do_remote_wakeup))
-                                ohci_writel(ohci, OHCI_INTR_RHSC,
-                                                &ohci->regs->intrenable);
-
                         /* everything is idle, no need for polling */
                         poll_rh = 0;
                 }
@@ -443,16 +438,12 @@ static inline int ohci_rh_resume(struct ohci_hcd *ohci)
 static int ohci_root_hub_state_changes(struct ohci_hcd *ohci, int changed,
                 int any_connected)
 {
-        /* If RHSC is enabled, don't poll */
-        if (ohci_readl(ohci, &ohci->regs->intrenable) & OHCI_INTR_RHSC)
-                return 0;
+        int     poll_rh = 1;
 
-        /* If no status changes are pending, enable status-change interrupts */
-        if (!changed) {
-                ohci_writel(ohci, OHCI_INTR_RHSC, &ohci->regs->intrenable);
-                return 0;
-        }
-        return 1;
+        /* keep on polling until RHSC is enabled */
+        if (ohci_readl(ohci, &ohci->regs->intrenable) & OHCI_INTR_RHSC)
+                poll_rh = 0;
+        return poll_rh;
 }
 
 #endif  /* CONFIG_PM */