34 files changed, 163 insertions, 72 deletions

diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index 63c34043b4d9..c3201affa0b6 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -1125,9 +1125,6 @@ static void stop_data_traffic(struct acm *acm)
         for (i = 0; i < acm->rx_buflimit; i++)
                 usb_kill_urb(acm->ru[i].urb);
 
-        INIT_LIST_HEAD(&acm->filled_read_bufs);
-        INIT_LIST_HEAD(&acm->spare_read_bufs);
-
         tasklet_enable(&acm->urb_task);
 
         cancel_work_sync(&acm->work);
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index 09a53e7f3327..42a436478b78 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -924,6 +924,15 @@ static int register_root_hub(struct usb_hcd *hcd)
         return retval;
 }
 
+void usb_enable_root_hub_irq (struct usb_bus *bus)
+{
+        struct usb_hcd *hcd;
+
+        hcd = container_of (bus, struct usb_hcd, self);
+        if (hcd->driver->hub_irq_enable && hcd->state != HC_STATE_HALT)
+                hcd->driver->hub_irq_enable (hcd);
+}
+
 
 /*-------------------------------------------------------------------------*/
 
@@ -1684,19 +1693,30 @@ EXPORT_SYMBOL_GPL(usb_bus_start_enum);
 irqreturn_t usb_hcd_irq (int irq, void *__hcd)
 {
         struct usb_hcd          *hcd = __hcd;
-        int                     start = hcd->state;
+        unsigned long           flags;
+        irqreturn_t             rc;
 
-        if (unlikely(start == HC_STATE_HALT ||
-            !test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)))
-                return IRQ_NONE;
-        if (hcd->driver->irq (hcd) == IRQ_NONE)
-                return IRQ_NONE;
+        /* IRQF_DISABLED doesn't work correctly with shared IRQs
+         * when the first handler doesn't use it.  So let's just
+         * assume it's never used.
+         */
+        local_irq_save(flags);
 
-        set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags);
+        if (unlikely(hcd->state == HC_STATE_HALT ||
+                     !test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))) {
+                rc = IRQ_NONE;
+        } else if (hcd->driver->irq(hcd) == IRQ_NONE) {
+                rc = IRQ_NONE;
+        } else {
+                set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags);
+
+                if (unlikely(hcd->state == HC_STATE_HALT))
+                        usb_hc_died(hcd);
+                rc = IRQ_HANDLED;
+        }
 
-        if (unlikely(hcd->state == HC_STATE_HALT))
-                usb_hc_died (hcd);
-        return IRQ_HANDLED;
+        local_irq_restore(flags);
+        return rc;
 }
 
 /*-------------------------------------------------------------------------*/
@@ -1860,6 +1880,13 @@ int usb_add_hcd(struct usb_hcd *hcd,
 
         /* enable irqs just before we start the controller */
         if (hcd->driver->irq) {
+
+                /* IRQF_DISABLED doesn't work as advertised when used together
+                 * with IRQF_SHARED. As usb_hcd_irq() will always disable
+                 * interrupts we can remove it here.
+                 */
+                irqflags &= ~IRQF_DISABLED;
+
                 snprintf(hcd->irq_descr, sizeof(hcd->irq_descr), "%s:usb%d",
                                 hcd->driver->description, hcd->self.busnum);
                 if ((retval = request_irq(irqnum, &usb_hcd_irq, irqflags,
diff --git a/drivers/usb/core/hcd.h b/drivers/usb/core/hcd.h
index a0bf5df6cb6f..b9de1569b39e 100644
--- a/drivers/usb/core/hcd.h
+++ b/drivers/usb/core/hcd.h
@@ -210,6 +210,8 @@ struct hc_driver {
         int     (*bus_suspend)(struct usb_hcd *);
         int     (*bus_resume)(struct usb_hcd *);
         int     (*start_port_reset)(struct usb_hcd *, unsigned port_num);
+        void    (*hub_irq_enable)(struct usb_hcd *);
+                /* Needed only if port-change IRQs are level-triggered */
 
                 /* force handover of high-speed port to full-speed companion */
         void    (*relinquish_port)(struct usb_hcd *, int);
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 94789be54ca3..4cfe32a16c37 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -713,18 +713,11 @@ static void hub_restart(struct usb_hub *hub, int type)
                 }
 
                 /* Was the power session lost while we were suspended? */
-                switch (type) {
-                case HUB_RESET_RESUME:
-                        portstatus = 0;
-                        portchange = USB_PORT_STAT_C_CONNECTION;
-                        break;
+                status = hub_port_status(hub, port1, &portstatus, &portchange);
 
-                case HUB_RESET:
-                case HUB_RESUME:
-                        status = hub_port_status(hub, port1,
-                                        &portstatus, &portchange);
-                        break;
-                }
+                /* If the device is gone, khubd will handle it later */
+                if (status == 0 && !(portstatus & USB_PORT_STAT_CONNECTION))
+                        continue;
 
                 /* For "USB_PERSIST"-enabled children we must
                  * mark the child device for reset-resume and
@@ -2080,6 +2073,8 @@ int usb_port_resume(struct usb_device *udev)
         }
 
         clear_bit(port1, hub->busy_bits);
+        if (!hub->hdev->parent && !hub->busy_bits[0])
+                usb_enable_root_hub_irq(hub->hdev->bus);
 
         if (status == 0)
                 status = finish_port_resume(udev);
@@ -3009,6 +3004,11 @@ static void hub_events(void)
 
                 hub->activating = 0;
 
+                /* If this is a root hub, tell the HCD it's okay to
+                 * re-enable port-change interrupts now. */
+                if (!hdev->parent && !hub->busy_bits[0])
+                        usb_enable_root_hub_irq(hdev->bus);
+
 loop_autopm:
                 /* Allow autosuspend if we're not going to run again */
                 if (list_empty(&hub->event_list))
@@ -3234,6 +3234,8 @@ int usb_reset_device(struct usb_device *udev)
                         break;
         }
         clear_bit(port1, parent_hub->busy_bits);
+        if (!parent_hdev->parent && !parent_hub->busy_bits[0])
+                usb_enable_root_hub_irq(parent_hdev->bus);
 
         if (ret < 0)
                 goto re_enumerate;
diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h
index 35a03095757e..90245fd8bac4 100644
--- a/drivers/usb/host/ehci.h
+++ b/drivers/usb/host/ehci.h
@@ -177,6 +177,15 @@ timer_action_done (struct ehci_hcd *ehci, enum ehci_timer_action action)
 static inline void
 timer_action (struct ehci_hcd *ehci, enum ehci_timer_action action)
 {
+        /* Don't override timeouts which shrink or (later) disable
+         * the async ring; just the I/O watchdog.  Note that if a
+         * SHRINK were pending, OFF would never be requested.
+         */
+        if (timer_pending(&ehci->watchdog)
+                        && ((BIT(TIMER_ASYNC_SHRINK) | BIT(TIMER_ASYNC_OFF))
+                                & ehci->actions))
+                return;
+
         if (!test_and_set_bit (action, &ehci->actions)) {
                 unsigned long t;
 
@@ -192,15 +201,7 @@ timer_action (struct ehci_hcd *ehci, enum ehci_timer_action action)
                         t = EHCI_SHRINK_JIFFIES;
                         break;
                 }
-                t += jiffies;
-                // all timings except IAA watchdog can be overridden.
-                // async queue SHRINK often precedes IAA.  while it's ready
-                // to go OFF neither can matter, and afterwards the IO
-                // watchdog stops unless there's still periodic traffic.
-                if (time_before_eq(t, ehci->watchdog.expires)
-                                && timer_pending (&ehci->watchdog))
-                        return;
-                mod_timer (&ehci->watchdog, t);
+                mod_timer(&ehci->watchdog, t + jiffies);
         }
 }
 
diff --git a/drivers/usb/host/ohci-at91.c b/drivers/usb/host/ohci-at91.c
index c96db1153dcf..e534f9de0f05 100644
--- a/drivers/usb/host/ohci-at91.c
+++ b/drivers/usb/host/ohci-at91.c
@@ -261,6 +261,7 @@ static const struct hc_driver ohci_at91_hc_driver = {
          */
         .hub_status_data =      ohci_hub_status_data,
         .hub_control =          ohci_hub_control,
+        .hub_irq_enable =       ohci_rhsc_enable,
 #ifdef CONFIG_PM
         .bus_suspend =          ohci_bus_suspend,
         .bus_resume =           ohci_bus_resume,
diff --git a/drivers/usb/host/ohci-au1xxx.c b/drivers/usb/host/ohci-au1xxx.c
index 1b9abdba920b..68c17f5ea8ea 100644
--- a/drivers/usb/host/ohci-au1xxx.c
+++ b/drivers/usb/host/ohci-au1xxx.c
@@ -8,7 +8,7 @@
  * Bus Glue for AMD Alchemy Au1xxx
  *
  * Written by Christopher Hoover <ch@hpl.hp.com>
- * Based on fragments of previous driver by Rusell King et al.
+ * Based on fragments of previous driver by Russell King et al.
  *
  * Modified for LH7A404 from ohci-sa1111.c
  *  by Durgesh Pattamatta <pattamattad@sharpsec.com>
@@ -288,6 +288,7 @@ static const struct hc_driver ohci_au1xxx_hc_driver = {
          */
         .hub_status_data =      ohci_hub_status_data,
         .hub_control =          ohci_hub_control,
+        .hub_irq_enable =       ohci_rhsc_enable,
 #ifdef  CONFIG_PM
         .bus_suspend =          ohci_bus_suspend,
         .bus_resume =           ohci_bus_resume,
diff --git a/drivers/usb/host/ohci-ep93xx.c b/drivers/usb/host/ohci-ep93xx.c
index 06aadfb0ec29..5adaf36e47d0 100644
--- a/drivers/usb/host/ohci-ep93xx.c
+++ b/drivers/usb/host/ohci-ep93xx.c
@@ -135,6 +135,7 @@ static struct hc_driver ohci_ep93xx_hc_driver = {
         .get_frame_number       = ohci_get_frame,
         .hub_status_data        = ohci_hub_status_data,
         .hub_control            = ohci_hub_control,
+        .hub_irq_enable         = ohci_rhsc_enable,
 #ifdef CONFIG_PM
         .bus_suspend            = ohci_bus_suspend,
         .bus_resume             = ohci_bus_resume,
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index 33f1c1c32edf..a8160d65f32b 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -1054,7 +1054,7 @@ MODULE_LICENSE ("GPL");
 
 #ifdef CONFIG_MFD_SM501
 #include "ohci-sm501.c"
-#define PLATFORM_DRIVER         ohci_hcd_sm501_driver
+#define SM501_OHCI_DRIVER       ohci_hcd_sm501_driver
 #endif
 
 #if     !defined(PCI_DRIVER) &&         \
@@ -1062,6 +1062,7 @@ MODULE_LICENSE ("GPL");
         !defined(OF_PLATFORM_DRIVER) && \
         !defined(SA1111_DRIVER) &&      \
         !defined(PS3_SYSTEM_BUS_DRIVER) && \
+        !defined(SM501_OHCI_DRIVER) && \
         !defined(SSB_OHCI_DRIVER)
 #error "missing bus glue for ohci-hcd"
 #endif
@@ -1121,9 +1122,18 @@ static int __init ohci_hcd_mod_init(void)
                 goto error_ssb;
 #endif
 
+#ifdef SM501_OHCI_DRIVER
+        retval = platform_driver_register(&SM501_OHCI_DRIVER);
+        if (retval < 0)
+                goto error_sm501;
+#endif
+
         return retval;
 
         /* Error path */
+#ifdef SM501_OHCI_DRIVER
+ error_sm501:
+#endif
 #ifdef SSB_OHCI_DRIVER
  error_ssb:
 #endif
@@ -1159,6 +1169,9 @@ module_init(ohci_hcd_mod_init);
 
 static void __exit ohci_hcd_mod_exit(void)
 {
+#ifdef SM501_OHCI_DRIVER
+        platform_driver_unregister(&SM501_OHCI_DRIVER);
+#endif
 #ifdef SSB_OHCI_DRIVER
         ssb_driver_unregister(&SSB_OHCI_DRIVER);
 #endif
diff --git a/drivers/usb/host/ohci-hub.c b/drivers/usb/host/ohci-hub.c
index 79a78029f896..b56739221d11 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 */
diff --git a/drivers/usb/host/ohci-lh7a404.c b/drivers/usb/host/ohci-lh7a404.c
index 96d14fa1d833..1ef5d482c145 100644
--- a/drivers/usb/host/ohci-lh7a404.c
+++ b/drivers/usb/host/ohci-lh7a404.c
@@ -8,7 +8,7 @@
  * Bus Glue for Sharp LH7A404
  *
  * Written by Christopher Hoover <ch@hpl.hp.com>
- * Based on fragments of previous driver by Rusell King et al.
+ * Based on fragments of previous driver by Russell King et al.
  *
  * Modified for LH7A404 from ohci-sa1111.c
  *  by Durgesh Pattamatta <pattamattad@sharpsec.com>
@@ -193,6 +193,7 @@ static const struct hc_driver ohci_lh7a404_hc_driver = {
          */
         .hub_status_data =      ohci_hub_status_data,
         .hub_control =          ohci_hub_control,
+        .hub_irq_enable =       ohci_rhsc_enable,
 #ifdef  CONFIG_PM
         .bus_suspend =          ohci_bus_suspend,
         .bus_resume =           ohci_bus_resume,
diff --git a/drivers/usb/host/ohci-omap.c b/drivers/usb/host/ohci-omap.c
index 6859fb5f1d6f..3a7c24c03671 100644
--- a/drivers/usb/host/ohci-omap.c
+++ b/drivers/usb/host/ohci-omap.c
@@ -466,6 +466,7 @@ static const struct hc_driver ohci_omap_hc_driver = {
          */
         .hub_status_data =      ohci_hub_status_data,
         .hub_control =          ohci_hub_control,
+        .hub_irq_enable =       ohci_rhsc_enable,
 #ifdef  CONFIG_PM
         .bus_suspend =          ohci_bus_suspend,
         .bus_resume =           ohci_bus_resume,
diff --git a/drivers/usb/host/ohci-pci.c b/drivers/usb/host/ohci-pci.c
index 3bf175d95a23..4696cc912e16 100644
--- a/drivers/usb/host/ohci-pci.c
+++ b/drivers/usb/host/ohci-pci.c
@@ -327,6 +327,7 @@ static const struct hc_driver ohci_pci_hc_driver = {
          */
         .hub_status_data =      ohci_hub_status_data,
         .hub_control =          ohci_hub_control,
+        .hub_irq_enable =       ohci_rhsc_enable,
 #ifdef  CONFIG_PM
         .bus_suspend =          ohci_bus_suspend,
         .bus_resume =           ohci_bus_resume,
diff --git a/drivers/usb/host/ohci-pnx4008.c b/drivers/usb/host/ohci-pnx4008.c
index 664f07ee8732..28b458f20cc3 100644
--- a/drivers/usb/host/ohci-pnx4008.c
+++ b/drivers/usb/host/ohci-pnx4008.c
@@ -280,6 +280,7 @@ static const struct hc_driver ohci_pnx4008_hc_driver = {
          */
         .hub_status_data = ohci_hub_status_data,
         .hub_control = ohci_hub_control,
+        .hub_irq_enable = ohci_rhsc_enable,
 #ifdef  CONFIG_PM
         .bus_suspend = ohci_bus_suspend,
         .bus_resume = ohci_bus_resume,
diff --git a/drivers/usb/host/ohci-pnx8550.c b/drivers/usb/host/ohci-pnx8550.c
index 28467e288a93..605d59cba28e 100644
--- a/drivers/usb/host/ohci-pnx8550.c
+++ b/drivers/usb/host/ohci-pnx8550.c
@@ -201,6 +201,7 @@ static const struct hc_driver ohci_pnx8550_hc_driver = {
          */
         .hub_status_data =      ohci_hub_status_data,
         .hub_control =          ohci_hub_control,
+        .hub_irq_enable =       ohci_rhsc_enable,
 #ifdef  CONFIG_PM
         .bus_suspend =          ohci_bus_suspend,
         .bus_resume =           ohci_bus_resume,
diff --git a/drivers/usb/host/ohci-ppc-of.c b/drivers/usb/host/ohci-ppc-of.c
index 50e55db13636..a67252791223 100644
--- a/drivers/usb/host/ohci-ppc-of.c
+++ b/drivers/usb/host/ohci-ppc-of.c
@@ -72,6 +72,7 @@ static const struct hc_driver ohci_ppc_of_hc_driver = {
          */
         .hub_status_data =      ohci_hub_status_data,
         .hub_control =          ohci_hub_control,
+        .hub_irq_enable =       ohci_rhsc_enable,
 #ifdef  CONFIG_PM
         .bus_suspend =          ohci_bus_suspend,
         .bus_resume =           ohci_bus_resume,
diff --git a/drivers/usb/host/ohci-ppc-soc.c b/drivers/usb/host/ohci-ppc-soc.c
index cd3398b675b2..523c30125577 100644
--- a/drivers/usb/host/ohci-ppc-soc.c
+++ b/drivers/usb/host/ohci-ppc-soc.c
@@ -172,6 +172,7 @@ static const struct hc_driver ohci_ppc_soc_hc_driver = {
          */
         .hub_status_data =      ohci_hub_status_data,
         .hub_control =          ohci_hub_control,
+        .hub_irq_enable =       ohci_rhsc_enable,
 #ifdef  CONFIG_PM
         .bus_suspend =          ohci_bus_suspend,
         .bus_resume =           ohci_bus_resume,
diff --git a/drivers/usb/host/ohci-ps3.c b/drivers/usb/host/ohci-ps3.c
index bfdeb0d22d05..c1935ae537f8 100644
--- a/drivers/usb/host/ohci-ps3.c
+++ b/drivers/usb/host/ohci-ps3.c
@@ -68,6 +68,7 @@ static const struct hc_driver ps3_ohci_hc_driver = {
         .get_frame_number       = ohci_get_frame,
         .hub_status_data        = ohci_hub_status_data,
         .hub_control            = ohci_hub_control,
+        .hub_irq_enable         = ohci_rhsc_enable,
         .start_port_reset       = ohci_start_port_reset,
 #if defined(CONFIG_PM)
         .bus_suspend            = ohci_bus_suspend,
diff --git a/drivers/usb/host/ohci-pxa27x.c b/drivers/usb/host/ohci-pxa27x.c
index 70b0d4b459e7..d4ee27d92be8 100644
--- a/drivers/usb/host/ohci-pxa27x.c
+++ b/drivers/usb/host/ohci-pxa27x.c
@@ -298,6 +298,7 @@ static const struct hc_driver ohci_pxa27x_hc_driver = {
          */
         .hub_status_data =      ohci_hub_status_data,
         .hub_control =          ohci_hub_control,
+        .hub_irq_enable =       ohci_rhsc_enable,
 #ifdef  CONFIG_PM
         .bus_suspend =          ohci_bus_suspend,
         .bus_resume =           ohci_bus_resume,
diff --git a/drivers/usb/host/ohci-q.c b/drivers/usb/host/ohci-q.c
index 9c9f3b59186f..9b547407c934 100644
--- a/drivers/usb/host/ohci-q.c
+++ b/drivers/usb/host/ohci-q.c
@@ -952,6 +952,7 @@ rescan_this:
                         struct urb      *urb;
                         urb_priv_t      *urb_priv;
                         __hc32          savebits;
+                        u32             tdINFO;
 
                         td = list_entry (entry, struct td, td_list);
                         urb = td->urb;
@@ -966,6 +967,17 @@ rescan_this:
                         savebits = *prev & ~cpu_to_hc32 (ohci, TD_MASK);
                         *prev = td->hwNextTD | savebits;
 
+                        /* If this was unlinked, the TD may not have been
+                         * retired ... so manually save the data toggle.
+                         * The controller ignores the value we save for
+                         * control and ISO endpoints.
+                         */
+                        tdINFO = hc32_to_cpup(ohci, &td->hwINFO);
+                        if ((tdINFO & TD_T) == TD_T_DATA0)
+                                ed->hwHeadP &= ~cpu_to_hc32(ohci, ED_C);
+                        else if ((tdINFO & TD_T) == TD_T_DATA1)
+                                ed->hwHeadP |= cpu_to_hc32(ohci, ED_C);
+
                         /* HC may have partly processed this TD */
                         td_done (ohci, urb, td);
                         urb_priv->td_cnt++;
diff --git a/drivers/usb/host/ohci-s3c2410.c b/drivers/usb/host/ohci-s3c2410.c
index a73d2ff322e2..3c7a740cfe0c 100644
--- a/drivers/usb/host/ohci-s3c2410.c
+++ b/drivers/usb/host/ohci-s3c2410.c
@@ -8,7 +8,7 @@
  * USB Bus Glue for Samsung S3C2410
  *
  * Written by Christopher Hoover <ch@hpl.hp.com>
- * Based on fragments of previous driver by Rusell King et al.
+ * Based on fragments of previous driver by Russell King et al.
  *
  * Modified for S3C2410 from ohci-sa1111.c, ohci-omap.c and ohci-lh7a40.c
  *      by Ben Dooks, <ben@simtec.co.uk>
@@ -466,6 +466,7 @@ static const struct hc_driver ohci_s3c2410_hc_driver = {
          */
         .hub_status_data =      ohci_s3c2410_hub_status_data,
         .hub_control =          ohci_s3c2410_hub_control,
+        .hub_irq_enable =       ohci_rhsc_enable,
 #ifdef  CONFIG_PM
         .bus_suspend =          ohci_bus_suspend,
         .bus_resume =           ohci_bus_resume,
diff --git a/drivers/usb/host/ohci-sa1111.c b/drivers/usb/host/ohci-sa1111.c
index 99438c65981b..2e9dceb9bb99 100644
--- a/drivers/usb/host/ohci-sa1111.c
+++ b/drivers/usb/host/ohci-sa1111.c
@@ -8,7 +8,7 @@
  * SA1111 Bus Glue
  *
  * Written by Christopher Hoover <ch@hpl.hp.com>
- * Based on fragments of previous driver by Rusell King et al.
+ * Based on fragments of previous driver by Russell King et al.
  *
  * This file is licenced under the GPL.
  */
@@ -231,6 +231,7 @@ static const struct hc_driver ohci_sa1111_hc_driver = {
          */
         .hub_status_data =      ohci_hub_status_data,
         .hub_control =          ohci_hub_control,
+        .hub_irq_enable =       ohci_rhsc_enable,
 #ifdef  CONFIG_PM
         .bus_suspend =          ohci_bus_suspend,
         .bus_resume =           ohci_bus_resume,
diff --git a/drivers/usb/host/ohci-sh.c b/drivers/usb/host/ohci-sh.c
index 60f03cc7ec4f..e7ee607278fe 100644
--- a/drivers/usb/host/ohci-sh.c
+++ b/drivers/usb/host/ohci-sh.c
@@ -68,6 +68,7 @@ static const struct hc_driver ohci_sh_hc_driver = {
          */
         .hub_status_data =      ohci_hub_status_data,
         .hub_control =          ohci_hub_control,
+        .hub_irq_enable =       ohci_rhsc_enable,
 #ifdef  CONFIG_PM
         .bus_suspend =          ohci_bus_suspend,
         .bus_resume =           ohci_bus_resume,
diff --git a/drivers/usb/host/ohci-sm501.c b/drivers/usb/host/ohci-sm501.c
index e899a77dfb83..e610698c6b60 100644
--- a/drivers/usb/host/ohci-sm501.c
+++ b/drivers/usb/host/ohci-sm501.c
@@ -75,6 +75,7 @@ static const struct hc_driver ohci_sm501_hc_driver = {
          */
         .hub_status_data =      ohci_hub_status_data,
         .hub_control =          ohci_hub_control,
+        .hub_irq_enable =       ohci_rhsc_enable,
 #ifdef  CONFIG_PM
         .bus_suspend =          ohci_bus_suspend,
         .bus_resume =           ohci_bus_resume,
diff --git a/drivers/usb/host/ohci-ssb.c b/drivers/usb/host/ohci-ssb.c
index c4265caec780..7275186db315 100644
--- a/drivers/usb/host/ohci-ssb.c
+++ b/drivers/usb/host/ohci-ssb.c
@@ -81,6 +81,7 @@ static const struct hc_driver ssb_ohci_hc_driver = {
 
         .hub_status_data        = ohci_hub_status_data,
         .hub_control            = ohci_hub_control,
+        .hub_irq_enable         = ohci_rhsc_enable,
 #ifdef  CONFIG_PM
         .bus_suspend            = ohci_bus_suspend,
         .bus_resume             = ohci_bus_resume,
diff --git a/drivers/usb/host/u132-hcd.c b/drivers/usb/host/u132-hcd.c
index f29307405bb3..9b6323f768b2 100644
--- a/drivers/usb/host/u132-hcd.c
+++ b/drivers/usb/host/u132-hcd.c
@@ -2934,6 +2934,16 @@ static int u132_start_port_reset(struct usb_hcd *hcd, unsigned port_num)
                 return 0;
 }
 
+static void u132_hub_irq_enable(struct usb_hcd *hcd)
+{
+        struct u132 *u132 = hcd_to_u132(hcd);
+        if (u132->going > 1) {
+                dev_err(&u132->platform_dev->dev, "device has been removed %d\n"
+                        , u132->going);
+        } else if (u132->going > 0)
+                dev_err(&u132->platform_dev->dev, "device is being removed\n");
+}
+
 
 #ifdef CONFIG_PM
 static int u132_bus_suspend(struct usb_hcd *hcd)
@@ -2985,6 +2995,7 @@ static struct hc_driver u132_hc_driver = {
         .bus_suspend = u132_bus_suspend,
         .bus_resume = u132_bus_resume,
         .start_port_reset = u132_start_port_reset,
+        .hub_irq_enable = u132_hub_irq_enable,
 };
 
 /*
diff --git a/drivers/usb/misc/sisusbvga/sisusb.c b/drivers/usb/misc/sisusbvga/sisusb.c
index cb7fa0eaf3ae..33182f4c2267 100644
--- a/drivers/usb/misc/sisusbvga/sisusb.c
+++ b/drivers/usb/misc/sisusbvga/sisusb.c
@@ -3264,8 +3264,6 @@ static void sisusb_disconnect(struct usb_interface *intf)
 
         /* decrement our usage count */
         kref_put(&sisusb->kref, sisusb_delete);
-
-        dev_info(&sisusb->sisusb_dev->dev, "Disconnected\n");
 }
 
 static struct usb_device_id sisusb_table [] = {
diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index 5234e7a3bd2c..0ff4a3971e45 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -637,6 +637,7 @@ static struct usb_device_id id_table_combined [] = {
         { USB_DEVICE(FTDI_VID, FTDI_OOCDLINK_PID),
                 .driver_info = (kernel_ulong_t)&ftdi_jtag_quirk },
         { USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID_USB60F) },
+        { USB_DEVICE(FTDI_VID, FTDI_REU_TINY_PID) },
         { },                                    /* Optional parameter entry */
         { }                                     /* Terminating entry */
 };
diff --git a/drivers/usb/serial/ftdi_sio.h b/drivers/usb/serial/ftdi_sio.h
index 06e0ecabb3eb..8302eca893ea 100644
--- a/drivers/usb/serial/ftdi_sio.h
+++ b/drivers/usb/serial/ftdi_sio.h
@@ -828,6 +828,9 @@
 /* Propox devices */
 #define FTDI_PROPOX_JTAGCABLEII_PID     0xD738
 
+/* Rig Expert Ukraine devices */
+#define FTDI_REU_TINY_PID               0xED22  /* RigExpert Tiny */
+
 /* Commands */
 #define FTDI_SIO_RESET          0 /* Reset the port */
 #define FTDI_SIO_MODEM_CTRL     1 /* Set the modem control register */
diff --git a/drivers/usb/serial/ipaq.c b/drivers/usb/serial/ipaq.c
index ea924dc48496..d9fb3768a2d7 100644
--- a/drivers/usb/serial/ipaq.c
+++ b/drivers/usb/serial/ipaq.c
@@ -570,7 +570,12 @@ static struct usb_serial_driver ipaq_device = {
         .description =          "PocketPC PDA",
         .usb_driver =           &ipaq_driver,
         .id_table =             ipaq_id_table,
-        .num_ports =            2,
+        /*
+         * some devices have an extra endpoint, which
+         * must be ignored as it would make the core
+         * create a second port which oopses when used
+         */
+        .num_ports =            1,
         .open =                 ipaq_open,
         .close =                ipaq_close,
         .attach =               ipaq_startup,
diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c
index 43cfde83a93b..a73420dd052a 100644
--- a/drivers/usb/serial/option.c
+++ b/drivers/usb/serial/option.c
@@ -306,6 +306,7 @@ static struct usb_device_id option_ids[] = {
         { USB_DEVICE(BANDRICH_VENDOR_ID, BANDRICH_PRODUCT_C100_1) },
         { USB_DEVICE(BANDRICH_VENDOR_ID, BANDRICH_PRODUCT_C100_2) },
         { USB_DEVICE(KYOCERA_VENDOR_ID, KYOCERA_PRODUCT_KPC680) },
+        { USB_DEVICE(QUALCOMM_VENDOR_ID, 0x6000)}, /* ZTE AC8700 */
         { USB_DEVICE(QUALCOMM_VENDOR_ID, 0x6613)}, /* Onda H600/ZTE MF330 */
         { USB_DEVICE(MAXON_VENDOR_ID, 0x6280) }, /* BP3-USB & BP3-EXT HSDPA */
         { USB_DEVICE(TELIT_VENDOR_ID, TELIT_PRODUCT_UC864E) },
diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index 103195abd417..2a0dd1b50dc4 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -57,6 +57,7 @@ static struct usb_device_id id_table [] = {
         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_PHAROS) },
         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_ALDIGA) },
         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MMX) },
+        { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GPRS) },
         { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) },
         { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID_RSAQ5) },
         { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID) },
diff --git a/drivers/usb/serial/pl2303.h b/drivers/usb/serial/pl2303.h
index cff160abb130..6ac3bbcf7a22 100644
--- a/drivers/usb/serial/pl2303.h
+++ b/drivers/usb/serial/pl2303.h
@@ -15,6 +15,7 @@
 #define PL2303_PRODUCT_ID_RSAQ3         0xaaa2
 #define PL2303_PRODUCT_ID_ALDIGA        0x0611
 #define PL2303_PRODUCT_ID_MMX           0x0612
+#define PL2303_PRODUCT_ID_GPRS          0x0609
 
 #define ATEN_VENDOR_ID          0x0557
 #define ATEN_VENDOR_ID2         0x0547
diff --git a/drivers/usb/storage/unusual_devs.h b/drivers/usb/storage/unusual_devs.h
index 45fe3663fa7f..39a7c11795c4 100644
--- a/drivers/usb/storage/unusual_devs.h
+++ b/drivers/usb/storage/unusual_devs.h
@@ -402,11 +402,19 @@ UNUSUAL_DEV(  0x04a5, 0x3010, 0x0100, 0x0100,
                 US_FL_IGNORE_RESIDUE ),
 
 #ifdef CONFIG_USB_STORAGE_CYPRESS_ATACB
+/* CY7C68300 : support atacb */
 UNUSUAL_DEV(  0x04b4, 0x6830, 0x0000, 0x9999,
                 "Cypress",
                 "Cypress AT2LP",
                 US_SC_CYP_ATACB, US_PR_DEVICE, NULL,
                 0),
+
+/* CY7C68310 : support atacb and atacb2 */
+UNUSUAL_DEV(  0x04b4, 0x6831, 0x0000, 0x9999,
+                "Cypress",
+                "Cypress ISD-300LP",
+                US_SC_CYP_ATACB, US_PR_DEVICE, NULL,
+                0),
 #endif
 
 /* Reported by Simon Levitt <simon@whattf.com>