Revert "USB: don't explicitly reenable root-hub status interrupts"

[pandora-kernel.git] / drivers / usb / host / ohci-hub.c

diff --git a/drivers/usb/host/ohci-hub.c b/drivers/usb/host/ohci-hub.c
index 79a7802..b567392 100644 (file)
--- 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 */