Merge branch 'usb-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6

* 'usb-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6: (172 commits)
  USB: Add support for SuperSpeed isoc endpoints
  xhci: Clean up cycle bit math used during stalls.
  xhci: Fix cycle bit calculation during stall handling.
  xhci: Update internal dequeue pointers after stalls.
  USB: Disable auto-suspend for USB 3.0 hubs.
  USB: Remove bogus USB_PORT_STAT_SUPER_SPEED symbol.
  xhci: Return canceled URBs immediately when host is halted.
  xhci: Fixes for suspend/resume of shared HCDs.
  xhci: Fix re-init on power loss after resume.
  xhci: Make roothub functions deal with device removal.
  xhci: Limit roothub ports to 15 USB3 & 31 USB2 ports.
  xhci: Return a USB 3.0 hub descriptor for USB3 roothub.
  xhci: Register second xHCI roothub.
  xhci: Change xhci_find_slot_id_by_port() API.
  xhci: Refactor bus suspend state into a struct.
  xhci: Index with a port array instead of PORTSC addresses.
  USB: Set usb_hcd->state and flags for shared roothubs.
  usb: Make core allocate resources per PCI-device.
  usb: Store bus type in usb_hcd, not in driver flags.
  usb: Change usb_hcd->bandwidth_mutex to a pointer.
  ...

8 files changed, 433 insertions, 180 deletions

diff --git a/drivers/usb/core/buffer.c b/drivers/usb/core/buffer.c
index 2c6965484fe8..b0585e623ba9 100644
--- a/drivers/usb/core/buffer.c
+++ b/drivers/usb/core/buffer.c
@@ -10,7 +10,7 @@
 #include <linux/slab.h>
 #include <linux/device.h>
 #include <linux/mm.h>
-#include <asm/io.h>
+#include <linux/io.h>
 #include <linux/dma-mapping.h>
 #include <linux/dmapool.h>
 #include <linux/usb.h>
@@ -22,7 +22,7 @@
  */
 
 /* FIXME tune these based on pool statistics ... */
-static const size_t     pool_max [HCD_BUFFER_POOLS] = {
+static const size_t     pool_max[HCD_BUFFER_POOLS] = {
         /* platforms without dma-friendly caches might need to
          * prevent cacheline sharing...
          */
@@ -51,7 +51,7 @@ static const size_t	pool_max [HCD_BUFFER_POOLS] = {
 int hcd_buffer_create(struct usb_hcd *hcd)
 {
         char            name[16];
-        int             i, size;
+        int             i, size;
 
         if (!hcd->self.controller->dma_mask &&
             !(hcd->driver->flags & HCD_LOCAL_MEM))
@@ -64,7 +64,7 @@ int hcd_buffer_create(struct usb_hcd *hcd)
                 snprintf(name, sizeof name, "buffer-%d", size);
                 hcd->pool[i] = dma_pool_create(name, hcd->self.controller,
                                 size, size, 0);
-                if (!hcd->pool [i]) {
+                if (!hcd->pool[i]) {
                         hcd_buffer_destroy(hcd);
                         return -ENOMEM;
                 }
@@ -99,14 +99,14 @@ void hcd_buffer_destroy(struct usb_hcd *hcd)
  */
 
 void *hcd_buffer_alloc(
-        struct usb_bus  *bus,
+        struct usb_bus          *bus,
         size_t                  size,
         gfp_t                   mem_flags,
         dma_addr_t              *dma
 )
 {
         struct usb_hcd          *hcd = bus_to_hcd(bus);
-        int                     i;
+        int                     i;
 
         /* some USB hosts just use PIO */
         if (!bus->controller->dma_mask &&
@@ -116,21 +116,21 @@ void *hcd_buffer_alloc(
         }
 
         for (i = 0; i < HCD_BUFFER_POOLS; i++) {
-                if (size <= pool_max [i])
-                        return dma_pool_alloc(hcd->pool [i], mem_flags, dma);
+                if (size <= pool_max[i])
+                        return dma_pool_alloc(hcd->pool[i], mem_flags, dma);
         }
         return dma_alloc_coherent(hcd->self.controller, size, dma, mem_flags);
 }
 
 void hcd_buffer_free(
-        struct usb_bus  *bus,
+        struct usb_bus          *bus,
         size_t                  size,
-        void                    *addr,
+        void                    *addr,
         dma_addr_t              dma
 )
 {
         struct usb_hcd          *hcd = bus_to_hcd(bus);
-        int                     i;
+        int                     i;
 
         if (!addr)
                 return;
@@ -142,8 +142,8 @@ void hcd_buffer_free(
         }
 
         for (i = 0; i < HCD_BUFFER_POOLS; i++) {
-                if (size <= pool_max [i]) {
-                        dma_pool_free(hcd->pool [i], addr, dma);
+                if (size <= pool_max[i]) {
+                        dma_pool_free(hcd->pool[i], addr, dma);
                         return;
                 }
         }
diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c
index fca61720b873..38072e4e74bd 100644
--- a/drivers/usb/core/driver.c
+++ b/drivers/usb/core/driver.c
@@ -1659,6 +1659,11 @@ static int usb_runtime_suspend(struct device *dev)
                 return -EAGAIN;
 
         status = usb_suspend_both(udev, PMSG_AUTO_SUSPEND);
+        /* The PM core reacts badly unless the return code is 0,
+         * -EAGAIN, or -EBUSY, so always return -EBUSY on an error.
+         */
+        if (status != 0)
+                return -EBUSY;
         return status;
 }
 
diff --git a/drivers/usb/core/hcd-pci.c b/drivers/usb/core/hcd-pci.c
index 64a035ba2eab..ce22f4a84ed0 100644
--- a/drivers/usb/core/hcd-pci.c
+++ b/drivers/usb/core/hcd-pci.c
@@ -192,13 +192,13 @@ int usb_hcd_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
                         "Found HC with no IRQ.  Check BIOS/PCI %s setup!\n",
                         pci_name(dev));
                 retval = -ENODEV;
-                goto err1;
+                goto disable_pci;
         }
 
         hcd = usb_create_hcd(driver, &dev->dev, pci_name(dev));
         if (!hcd) {
                 retval = -ENOMEM;
-                goto err1;
+                goto disable_pci;
         }
 
         if (driver->flags & HCD_MEMORY) {
@@ -209,13 +209,13 @@ int usb_hcd_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
                                 driver->description)) {
                         dev_dbg(&dev->dev, "controller already in use\n");
                         retval = -EBUSY;
-                        goto err2;
+                        goto clear_companion;
                 }
                 hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
                 if (hcd->regs == NULL) {
                         dev_dbg(&dev->dev, "error mapping memory\n");
                         retval = -EFAULT;
-                        goto err3;
+                        goto release_mem_region;
                 }
 
         } else {
@@ -236,7 +236,7 @@ int usb_hcd_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
                 if (region == PCI_ROM_RESOURCE) {
                         dev_dbg(&dev->dev, "no i/o regions available\n");
                         retval = -EBUSY;
-                        goto err2;
+                        goto clear_companion;
                 }
         }
 
@@ -244,24 +244,24 @@ int usb_hcd_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
 
         retval = usb_add_hcd(hcd, dev->irq, IRQF_DISABLED | IRQF_SHARED);
         if (retval != 0)
-                goto err4;
+                goto unmap_registers;
         set_hs_companion(dev, hcd);
 
         if (pci_dev_run_wake(dev))
                 pm_runtime_put_noidle(&dev->dev);
         return retval;
 
- err4:
+unmap_registers:
         if (driver->flags & HCD_MEMORY) {
                 iounmap(hcd->regs);
- err3:
+release_mem_region:
                 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
         } else
                 release_region(hcd->rsrc_start, hcd->rsrc_len);
- err2:
+clear_companion:
         clear_hs_companion(dev, hcd);
         usb_put_hcd(hcd);
- err1:
+disable_pci:
         pci_disable_device(dev);
         dev_err(&dev->dev, "init %s fail, %d\n", pci_name(dev), retval);
         return retval;
@@ -363,11 +363,17 @@ static int check_root_hub_suspended(struct device *dev)
         struct pci_dev          *pci_dev = to_pci_dev(dev);
         struct usb_hcd          *hcd = pci_get_drvdata(pci_dev);
 
-        if (!(hcd->state == HC_STATE_SUSPENDED ||
-                        hcd->state == HC_STATE_HALT)) {
+        if (HCD_RH_RUNNING(hcd)) {
                 dev_warn(dev, "Root hub is not suspended\n");
                 return -EBUSY;
         }
+        if (hcd->shared_hcd) {
+                hcd = hcd->shared_hcd;
+                if (HCD_RH_RUNNING(hcd)) {
+                        dev_warn(dev, "Secondary root hub is not suspended\n");
+                        return -EBUSY;
+                }
+        }
         return 0;
 }
 
@@ -386,17 +392,22 @@ static int suspend_common(struct device *dev, bool do_wakeup)
         if (retval)
                 return retval;
 
-        if (hcd->driver->pci_suspend) {
+        if (hcd->driver->pci_suspend && !HCD_DEAD(hcd)) {
                 /* Optimization: Don't suspend if a root-hub wakeup is
                  * pending and it would cause the HCD to wake up anyway.
                  */
                 if (do_wakeup && HCD_WAKEUP_PENDING(hcd))
                         return -EBUSY;
+                if (do_wakeup && hcd->shared_hcd &&
+                                HCD_WAKEUP_PENDING(hcd->shared_hcd))
+                        return -EBUSY;
                 retval = hcd->driver->pci_suspend(hcd, do_wakeup);
                 suspend_report_result(hcd->driver->pci_suspend, retval);
 
                 /* Check again in case wakeup raced with pci_suspend */
-                if (retval == 0 && do_wakeup && HCD_WAKEUP_PENDING(hcd)) {
+                if ((retval == 0 && do_wakeup && HCD_WAKEUP_PENDING(hcd)) ||
+                                (retval == 0 && do_wakeup && hcd->shared_hcd &&
+                                 HCD_WAKEUP_PENDING(hcd->shared_hcd))) {
                         if (hcd->driver->pci_resume)
                                 hcd->driver->pci_resume(hcd, false);
                         retval = -EBUSY;
@@ -427,7 +438,9 @@ static int resume_common(struct device *dev, int event)
         struct usb_hcd          *hcd = pci_get_drvdata(pci_dev);
         int                     retval;
 
-        if (hcd->state != HC_STATE_SUSPENDED) {
+        if (HCD_RH_RUNNING(hcd) ||
+                        (hcd->shared_hcd &&
+                         HCD_RH_RUNNING(hcd->shared_hcd))) {
                 dev_dbg(dev, "can't resume, not suspended!\n");
                 return 0;
         }
@@ -441,8 +454,10 @@ static int resume_common(struct device *dev, int event)
         pci_set_master(pci_dev);
 
         clear_bit(HCD_FLAG_SAW_IRQ, &hcd->flags);
+        if (hcd->shared_hcd)
+                clear_bit(HCD_FLAG_SAW_IRQ, &hcd->shared_hcd->flags);
 
-        if (hcd->driver->pci_resume) {
+        if (hcd->driver->pci_resume && !HCD_DEAD(hcd)) {
                 if (event != PM_EVENT_AUTO_RESUME)
                         wait_for_companions(pci_dev, hcd);
 
@@ -450,6 +465,8 @@ static int resume_common(struct device *dev, int event)
                                 event == PM_EVENT_RESTORE);
                 if (retval) {
                         dev_err(dev, "PCI post-resume error %d!\n", retval);
+                        if (hcd->shared_hcd)
+                                usb_hc_died(hcd->shared_hcd);
                         usb_hc_died(hcd);
                 }
         }
@@ -475,10 +492,11 @@ static int hcd_pci_suspend_noirq(struct device *dev)
 
         pci_save_state(pci_dev);
 
-        /* If the root hub is HALTed rather than SUSPENDed,
-         * disallow remote wakeup.
+        /* If the root hub is dead rather than suspended, disallow remote
+         * wakeup.  usb_hc_died() should ensure that both hosts are marked as
+         * dying, so we only need to check the primary roothub.
          */
-        if (hcd->state == HC_STATE_HALT)
+        if (HCD_DEAD(hcd))
                 device_set_wakeup_enable(dev, 0);
         dev_dbg(dev, "wakeup: %d\n", device_may_wakeup(dev));
 
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index e935f71d7a34..02b4dbfa488a 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -297,7 +297,7 @@ static const u8 ss_rh_config_descriptor[] = {
         /* one configuration */
         0x09,       /*  __u8  bLength; */
         0x02,       /*  __u8  bDescriptorType; Configuration */
-        0x19, 0x00, /*  __le16 wTotalLength; FIXME */
+        0x1f, 0x00, /*  __le16 wTotalLength; */
         0x01,       /*  __u8  bNumInterfaces; (1) */
         0x01,       /*  __u8  bConfigurationValue; */
         0x00,       /*  __u8  iConfiguration; */
@@ -327,11 +327,14 @@ static const u8 ss_rh_config_descriptor[] = {
                     /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8)
                      * see hub.c:hub_configure() for details. */
         (USB_MAXCHILDREN + 1 + 7) / 8, 0x00,
-        0x0c        /*  __u8  ep_bInterval; (256ms -- usb 2.0 spec) */
-        /*
-         * All 3.0 hubs should have an endpoint companion descriptor,
-         * but we're ignoring that for now.  FIXME?
-         */
+        0x0c,       /*  __u8  ep_bInterval; (256ms -- usb 2.0 spec) */
+
+        /* one SuperSpeed endpoint companion descriptor */
+        0x06,        /* __u8 ss_bLength */
+        0x30,        /* __u8 ss_bDescriptorType; SuperSpeed EP Companion */
+        0x00,        /* __u8 ss_bMaxBurst; allows 1 TX between ACKs */
+        0x00,        /* __u8 ss_bmAttributes; 1 packet per service interval */
+        0x02, 0x00   /* __le16 ss_wBytesPerInterval; 15 bits for max 15 ports */
 };
 
 /*-------------------------------------------------------------------------*/
@@ -504,7 +507,7 @@ static int rh_call_control (struct usb_hcd *hcd, struct urb *urb)
         case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
                 switch (wValue & 0xff00) {
                 case USB_DT_DEVICE << 8:
-                        switch (hcd->driver->flags & HCD_MASK) {
+                        switch (hcd->speed) {
                         case HCD_USB3:
                                 bufp = usb3_rh_dev_descriptor;
                                 break;
@@ -522,7 +525,7 @@ static int rh_call_control (struct usb_hcd *hcd, struct urb *urb)
                                 patch_protocol = 1;
                         break;
                 case USB_DT_CONFIG << 8:
-                        switch (hcd->driver->flags & HCD_MASK) {
+                        switch (hcd->speed) {
                         case HCD_USB3:
                                 bufp = ss_rh_config_descriptor;
                                 len = sizeof ss_rh_config_descriptor;
@@ -983,7 +986,7 @@ static int register_root_hub(struct usb_hcd *hcd)
                 spin_unlock_irq (&hcd_root_hub_lock);
 
                 /* Did the HC die before the root hub was registered? */
-                if (hcd->state == HC_STATE_HALT)
+                if (HCD_DEAD(hcd) || hcd->state == HC_STATE_HALT)
                         usb_hc_died (hcd);      /* This time clean up */
         }
 
@@ -1089,13 +1092,10 @@ int usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb)
          * Check the host controller's state and add the URB to the
          * endpoint's queue.
          */
-        switch (hcd->state) {
-        case HC_STATE_RUNNING:
-        case HC_STATE_RESUMING:
+        if (HCD_RH_RUNNING(hcd)) {
                 urb->unlinked = 0;
                 list_add_tail(&urb->urb_list, &urb->ep->urb_list);
-                break;
-        default:
+        } else {
                 rc = -ESHUTDOWN;
                 goto done;
         }
@@ -1153,6 +1153,8 @@ int usb_hcd_check_unlink_urb(struct usb_hcd *hcd, struct urb *urb,
                 dev_warn(hcd->self.controller, "Unlink after no-IRQ?  "
                         "Controller is probably using the wrong IRQ.\n");
                 set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags);
+                if (hcd->shared_hcd)
+                        set_bit(HCD_FLAG_SAW_IRQ, &hcd->shared_hcd->flags);
         }
 
         return 0;
@@ -1262,7 +1264,7 @@ static void hcd_free_coherent(struct usb_bus *bus, dma_addr_t *dma_handle,
         *dma_handle = 0;
 }
 
-void unmap_urb_setup_for_dma(struct usb_hcd *hcd, struct urb *urb)
+void usb_hcd_unmap_urb_setup_for_dma(struct usb_hcd *hcd, struct urb *urb)
 {
         if (urb->transfer_flags & URB_SETUP_MAP_SINGLE)
                 dma_unmap_single(hcd->self.controller,
@@ -1279,13 +1281,21 @@ void unmap_urb_setup_for_dma(struct usb_hcd *hcd, struct urb *urb)
         /* Make it safe to call this routine more than once */
         urb->transfer_flags &= ~(URB_SETUP_MAP_SINGLE | URB_SETUP_MAP_LOCAL);
 }
-EXPORT_SYMBOL_GPL(unmap_urb_setup_for_dma);
+EXPORT_SYMBOL_GPL(usb_hcd_unmap_urb_setup_for_dma);
 
-void unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb)
+static void unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb)
+{
+        if (hcd->driver->unmap_urb_for_dma)
+                hcd->driver->unmap_urb_for_dma(hcd, urb);
+        else
+                usb_hcd_unmap_urb_for_dma(hcd, urb);
+}
+
+void usb_hcd_unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb)
 {
         enum dma_data_direction dir;
 
-        unmap_urb_setup_for_dma(hcd, urb);
+        usb_hcd_unmap_urb_setup_for_dma(hcd, urb);
 
         dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
         if (urb->transfer_flags & URB_DMA_MAP_SG)
@@ -1314,11 +1324,20 @@ void unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb)
         urb->transfer_flags &= ~(URB_DMA_MAP_SG | URB_DMA_MAP_PAGE |
                         URB_DMA_MAP_SINGLE | URB_MAP_LOCAL);
 }
-EXPORT_SYMBOL_GPL(unmap_urb_for_dma);
+EXPORT_SYMBOL_GPL(usb_hcd_unmap_urb_for_dma);
 
 static int map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb,
                            gfp_t mem_flags)
 {
+        if (hcd->driver->map_urb_for_dma)
+                return hcd->driver->map_urb_for_dma(hcd, urb, mem_flags);
+        else
+                return usb_hcd_map_urb_for_dma(hcd, urb, mem_flags);
+}
+
+int usb_hcd_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb,
+                            gfp_t mem_flags)
+{
         enum dma_data_direction dir;
         int ret = 0;
 
@@ -1410,10 +1429,11 @@ static int map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb,
                 }
                 if (ret && (urb->transfer_flags & (URB_SETUP_MAP_SINGLE |
                                 URB_SETUP_MAP_LOCAL)))
-                        unmap_urb_for_dma(hcd, urb);
+                        usb_hcd_unmap_urb_for_dma(hcd, urb);
         }
         return ret;
 }
+EXPORT_SYMBOL_GPL(usb_hcd_map_urb_for_dma);
 
 /*-------------------------------------------------------------------------*/
 
@@ -1913,7 +1933,7 @@ int usb_hcd_get_frame_number (struct usb_device *udev)
 {
         struct usb_hcd  *hcd = bus_to_hcd(udev->bus);
 
-        if (!HC_IS_RUNNING (hcd->state))
+        if (!HCD_RH_RUNNING(hcd))
                 return -ESHUTDOWN;
         return hcd->driver->get_frame_number (hcd);
 }
@@ -1930,9 +1950,15 @@ int hcd_bus_suspend(struct usb_device *rhdev, pm_message_t msg)
 
         dev_dbg(&rhdev->dev, "bus %s%s\n",
                         (msg.event & PM_EVENT_AUTO ? "auto-" : ""), "suspend");
+        if (HCD_DEAD(hcd)) {
+                dev_dbg(&rhdev->dev, "skipped %s of dead bus\n", "suspend");
+                return 0;
+        }
+
         if (!hcd->driver->bus_suspend) {
                 status = -ENOENT;
         } else {
+                clear_bit(HCD_FLAG_RH_RUNNING, &hcd->flags);
                 hcd->state = HC_STATE_QUIESCING;
                 status = hcd->driver->bus_suspend(hcd);
         }
@@ -1940,7 +1966,12 @@ int hcd_bus_suspend(struct usb_device *rhdev, pm_message_t msg)
                 usb_set_device_state(rhdev, USB_STATE_SUSPENDED);
                 hcd->state = HC_STATE_SUSPENDED;
         } else {
-                hcd->state = old_state;
+                spin_lock_irq(&hcd_root_hub_lock);
+                if (!HCD_DEAD(hcd)) {
+                        set_bit(HCD_FLAG_RH_RUNNING, &hcd->flags);
+                        hcd->state = old_state;
+                }
+                spin_unlock_irq(&hcd_root_hub_lock);
                 dev_dbg(&rhdev->dev, "bus %s fail, err %d\n",
                                 "suspend", status);
         }
@@ -1955,9 +1986,13 @@ int hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg)
 
         dev_dbg(&rhdev->dev, "usb %s%s\n",
                         (msg.event & PM_EVENT_AUTO ? "auto-" : ""), "resume");
+        if (HCD_DEAD(hcd)) {
+                dev_dbg(&rhdev->dev, "skipped %s of dead bus\n", "resume");
+                return 0;
+        }
         if (!hcd->driver->bus_resume)
                 return -ENOENT;
-        if (hcd->state == HC_STATE_RUNNING)
+        if (HCD_RH_RUNNING(hcd))
                 return 0;
 
         hcd->state = HC_STATE_RESUMING;
@@ -1966,10 +2001,15 @@ int hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg)
         if (status == 0) {
                 /* TRSMRCY = 10 msec */
                 msleep(10);
-                usb_set_device_state(rhdev, rhdev->actconfig
-                                ? USB_STATE_CONFIGURED
-                                : USB_STATE_ADDRESS);
-                hcd->state = HC_STATE_RUNNING;
+                spin_lock_irq(&hcd_root_hub_lock);
+                if (!HCD_DEAD(hcd)) {
+                        usb_set_device_state(rhdev, rhdev->actconfig
+                                        ? USB_STATE_CONFIGURED
+                                        : USB_STATE_ADDRESS);
+                        set_bit(HCD_FLAG_RH_RUNNING, &hcd->flags);
+                        hcd->state = HC_STATE_RUNNING;
+                }
+                spin_unlock_irq(&hcd_root_hub_lock);
         } else {
                 hcd->state = old_state;
                 dev_dbg(&rhdev->dev, "bus %s fail, err %d\n",
@@ -2080,12 +2120,14 @@ irqreturn_t usb_hcd_irq (int irq, void *__hcd)
          */
         local_irq_save(flags);
 
-        if (unlikely(hcd->state == HC_STATE_HALT || !HCD_HW_ACCESSIBLE(hcd))) {
+        if (unlikely(HCD_DEAD(hcd) || !HCD_HW_ACCESSIBLE(hcd))) {
                 rc = IRQ_NONE;
         } else if (hcd->driver->irq(hcd) == IRQ_NONE) {
                 rc = IRQ_NONE;
         } else {
                 set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags);
+                if (hcd->shared_hcd)
+                        set_bit(HCD_FLAG_SAW_IRQ, &hcd->shared_hcd->flags);
 
                 if (unlikely(hcd->state == HC_STATE_HALT))
                         usb_hc_died(hcd);
@@ -2105,7 +2147,9 @@ EXPORT_SYMBOL_GPL(usb_hcd_irq);
  *
  * This is called by bus glue to report a USB host controller that died
  * while operations may still have been pending.  It's called automatically
- * by the PCI glue, so only glue for non-PCI busses should need to call it. 
+ * by the PCI glue, so only glue for non-PCI busses should need to call it.
+ *
+ * Only call this function with the primary HCD.
  */
 void usb_hc_died (struct usb_hcd *hcd)
 {
@@ -2114,6 +2158,8 @@ void usb_hc_died (struct usb_hcd *hcd)
         dev_err (hcd->self.controller, "HC died; cleaning up\n");
 
         spin_lock_irqsave (&hcd_root_hub_lock, flags);
+        clear_bit(HCD_FLAG_RH_RUNNING, &hcd->flags);
+        set_bit(HCD_FLAG_DEAD, &hcd->flags);
         if (hcd->rh_registered) {
                 clear_bit(HCD_FLAG_POLL_RH, &hcd->flags);
 
@@ -2122,17 +2168,31 @@ void usb_hc_died (struct usb_hcd *hcd)
                                 USB_STATE_NOTATTACHED);
                 usb_kick_khubd (hcd->self.root_hub);
         }
+        if (usb_hcd_is_primary_hcd(hcd) && hcd->shared_hcd) {
+                hcd = hcd->shared_hcd;
+                if (hcd->rh_registered) {
+                        clear_bit(HCD_FLAG_POLL_RH, &hcd->flags);
+
+                        /* make khubd clean up old urbs and devices */
+                        usb_set_device_state(hcd->self.root_hub,
+                                        USB_STATE_NOTATTACHED);
+                        usb_kick_khubd(hcd->self.root_hub);
+                }
+        }
         spin_unlock_irqrestore (&hcd_root_hub_lock, flags);
+        /* Make sure that the other roothub is also deallocated. */
 }
 EXPORT_SYMBOL_GPL (usb_hc_died);
 
 /*-------------------------------------------------------------------------*/
 
 /**
- * usb_create_hcd - create and initialize an HCD structure
+ * usb_create_shared_hcd - create and initialize an HCD structure
  * @driver: HC driver that will use this hcd
  * @dev: device for this HC, stored in hcd->self.controller
  * @bus_name: value to store in hcd->self.bus_name
+ * @primary_hcd: a pointer to the usb_hcd structure that is sharing the
+ *              PCI device.  Only allocate certain resources for the primary HCD
  * Context: !in_interrupt()
  *
  * Allocate a struct usb_hcd, with extra space at the end for the
@@ -2141,8 +2201,9 @@ EXPORT_SYMBOL_GPL (usb_hc_died);
  *
  * If memory is unavailable, returns NULL.
  */
-struct usb_hcd *usb_create_hcd (const struct hc_driver *driver,
-                struct device *dev, const char *bus_name)
+struct usb_hcd *usb_create_shared_hcd(const struct hc_driver *driver,
+                struct device *dev, const char *bus_name,
+                struct usb_hcd *primary_hcd)
 {
         struct usb_hcd *hcd;
 
@@ -2151,7 +2212,24 @@ struct usb_hcd *usb_create_hcd (const struct hc_driver *driver,
                 dev_dbg (dev, "hcd alloc failed\n");
                 return NULL;
         }
-        dev_set_drvdata(dev, hcd);
+        if (primary_hcd == NULL) {
+                hcd->bandwidth_mutex = kmalloc(sizeof(*hcd->bandwidth_mutex),
+                                GFP_KERNEL);
+                if (!hcd->bandwidth_mutex) {
+                        kfree(hcd);
+                        dev_dbg(dev, "hcd bandwidth mutex alloc failed\n");
+                        return NULL;
+                }
+                mutex_init(hcd->bandwidth_mutex);
+                dev_set_drvdata(dev, hcd);
+        } else {
+                hcd->bandwidth_mutex = primary_hcd->bandwidth_mutex;
+                hcd->primary_hcd = primary_hcd;
+                primary_hcd->primary_hcd = primary_hcd;
+                hcd->shared_hcd = primary_hcd;
+                primary_hcd->shared_hcd = hcd;
+        }
+
         kref_init(&hcd->kref);
 
         usb_bus_init(&hcd->self);
@@ -2165,19 +2243,53 @@ struct usb_hcd *usb_create_hcd (const struct hc_driver *driver,
 #ifdef CONFIG_USB_SUSPEND
         INIT_WORK(&hcd->wakeup_work, hcd_resume_work);
 #endif
-        mutex_init(&hcd->bandwidth_mutex);
 
         hcd->driver = driver;
+        hcd->speed = driver->flags & HCD_MASK;
         hcd->product_desc = (driver->product_desc) ? driver->product_desc :
                         "USB Host Controller";
         return hcd;
 }
+EXPORT_SYMBOL_GPL(usb_create_shared_hcd);
+
+/**
+ * usb_create_hcd - create and initialize an HCD structure
+ * @driver: HC driver that will use this hcd
+ * @dev: device for this HC, stored in hcd->self.controller
+ * @bus_name: value to store in hcd->self.bus_name
+ * Context: !in_interrupt()
+ *
+ * Allocate a struct usb_hcd, with extra space at the end for the
+ * HC driver's private data.  Initialize the generic members of the
+ * hcd structure.
+ *
+ * If memory is unavailable, returns NULL.
+ */
+struct usb_hcd *usb_create_hcd(const struct hc_driver *driver,
+                struct device *dev, const char *bus_name)
+{
+        return usb_create_shared_hcd(driver, dev, bus_name, NULL);
+}
 EXPORT_SYMBOL_GPL(usb_create_hcd);
 
+/*
+ * Roothubs that share one PCI device must also share the bandwidth mutex.
+ * Don't deallocate the bandwidth_mutex until the last shared usb_hcd is
+ * deallocated.
+ *
+ * Make sure to only deallocate the bandwidth_mutex when the primary HCD is
+ * freed.  When hcd_release() is called for the non-primary HCD, set the
+ * primary_hcd's shared_hcd pointer to null (since the non-primary HCD will be
+ * freed shortly).
+ */
 static void hcd_release (struct kref *kref)
 {
         struct usb_hcd *hcd = container_of (kref, struct usb_hcd, kref);
 
+        if (usb_hcd_is_primary_hcd(hcd))
+                kfree(hcd->bandwidth_mutex);
+        else
+                hcd->shared_hcd->shared_hcd = NULL;
         kfree(hcd);
 }
 
@@ -2196,6 +2308,54 @@ void usb_put_hcd (struct usb_hcd *hcd)
 }
 EXPORT_SYMBOL_GPL(usb_put_hcd);
 
+int usb_hcd_is_primary_hcd(struct usb_hcd *hcd)
+{
+        if (!hcd->primary_hcd)
+                return 1;
+        return hcd == hcd->primary_hcd;
+}
+EXPORT_SYMBOL_GPL(usb_hcd_is_primary_hcd);
+
+static int usb_hcd_request_irqs(struct usb_hcd *hcd,
+                unsigned int irqnum, unsigned long irqflags)
+{
+        int retval;
+
+        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.
+                 */
+                if (irqflags & IRQF_SHARED)
+                        irqflags &= ~IRQF_DISABLED;
+
+                snprintf(hcd->irq_descr, sizeof(hcd->irq_descr), "%s:usb%d",
+                                hcd->driver->description, hcd->self.busnum);
+                retval = request_irq(irqnum, &usb_hcd_irq, irqflags,
+                                hcd->irq_descr, hcd);
+                if (retval != 0) {
+                        dev_err(hcd->self.controller,
+                                        "request interrupt %d failed\n",
+                                        irqnum);
+                        return retval;
+                }
+                hcd->irq = irqnum;
+                dev_info(hcd->self.controller, "irq %d, %s 0x%08llx\n", irqnum,
+                                (hcd->driver->flags & HCD_MEMORY) ?
+                                        "io mem" : "io base",
+                                        (unsigned long long)hcd->rsrc_start);
+        } else {
+                hcd->irq = -1;
+                if (hcd->rsrc_start)
+                        dev_info(hcd->self.controller, "%s 0x%08llx\n",
+                                        (hcd->driver->flags & HCD_MEMORY) ?
+                                        "io mem" : "io base",
+                                        (unsigned long long)hcd->rsrc_start);
+        }
+        return 0;
+}
+
 /**
  * usb_add_hcd - finish generic HCD structure initialization and register
  * @hcd: the usb_hcd structure to initialize
@@ -2236,7 +2396,7 @@ int usb_add_hcd(struct usb_hcd *hcd,
         }
         hcd->self.root_hub = rhdev;
 
-        switch (hcd->driver->flags & HCD_MASK) {
+        switch (hcd->speed) {
         case HCD_USB11:
                 rhdev->speed = USB_SPEED_FULL;
                 break;
@@ -2256,6 +2416,12 @@ int usb_add_hcd(struct usb_hcd *hcd,
          */
         device_init_wakeup(&rhdev->dev, 1);
 
+        /* HCD_FLAG_RH_RUNNING doesn't matter until the root hub is
+         * registered.  But since the controller can die at any time,
+         * let's initialize the flag before touching the hardware.
+         */
+        set_bit(HCD_FLAG_RH_RUNNING, &hcd->flags);
+
         /* "reset" is misnamed; its role is now one-time init. the controller
          * should already have been reset (and boot firmware kicked off etc).
          */
@@ -2271,38 +2437,15 @@ int usb_add_hcd(struct usb_hcd *hcd,
                 dev_dbg(hcd->self.controller, "supports USB remote wakeup\n");
 
         /* 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.
-                 */
-                if (irqflags & IRQF_SHARED)
-                        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,
-                                hcd->irq_descr, hcd)) != 0) {
-                        dev_err(hcd->self.controller,
-                                        "request interrupt %d failed\n", irqnum);
+        if (usb_hcd_is_primary_hcd(hcd)) {
+                retval = usb_hcd_request_irqs(hcd, irqnum, irqflags);
+                if (retval)
                         goto err_request_irq;
-                }
-                hcd->irq = irqnum;
-                dev_info(hcd->self.controller, "irq %d, %s 0x%08llx\n", irqnum,
-                                (hcd->driver->flags & HCD_MEMORY) ?
-                                        "io mem" : "io base",
-                                        (unsigned long long)hcd->rsrc_start);
-        } else {
-                hcd->irq = -1;
-                if (hcd->rsrc_start)
-                        dev_info(hcd->self.controller, "%s 0x%08llx\n",
-                                        (hcd->driver->flags & HCD_MEMORY) ?
-                                        "io mem" : "io base",
-                                        (unsigned long long)hcd->rsrc_start);
         }
 
-        if ((retval = hcd->driver->start(hcd)) < 0) {
+        hcd->state = HC_STATE_RUNNING;
+        retval = hcd->driver->start(hcd);
+        if (retval < 0) {
                 dev_err(hcd->self.controller, "startup error %d\n", retval);
                 goto err_hcd_driver_start;
         }
@@ -2323,6 +2466,7 @@ int usb_add_hcd(struct usb_hcd *hcd,
         return retval;
 
 error_create_attr_group:
+        clear_bit(HCD_FLAG_RH_RUNNING, &hcd->flags);
         if (HC_IS_RUNNING(hcd->state))
                 hcd->state = HC_STATE_QUIESCING;
         spin_lock_irq(&hcd_root_hub_lock);
@@ -2344,7 +2488,7 @@ err_register_root_hub:
         clear_bit(HCD_FLAG_POLL_RH, &hcd->flags);
         del_timer_sync(&hcd->rh_timer);
 err_hcd_driver_start:
-        if (hcd->irq >= 0)
+        if (usb_hcd_is_primary_hcd(hcd) && hcd->irq >= 0)
                 free_irq(irqnum, hcd);
 err_request_irq:
 err_hcd_driver_setup:
@@ -2375,6 +2519,7 @@ void usb_remove_hcd(struct usb_hcd *hcd)
         usb_get_dev(rhdev);
         sysfs_remove_group(&rhdev->dev.kobj, &usb_bus_attr_group);
 
+        clear_bit(HCD_FLAG_RH_RUNNING, &hcd->flags);
         if (HC_IS_RUNNING (hcd->state))
                 hcd->state = HC_STATE_QUIESCING;
 
@@ -2407,8 +2552,10 @@ void usb_remove_hcd(struct usb_hcd *hcd)
         clear_bit(HCD_FLAG_POLL_RH, &hcd->flags);
         del_timer_sync(&hcd->rh_timer);
 
-        if (hcd->irq >= 0)
-                free_irq(hcd->irq, hcd);
+        if (usb_hcd_is_primary_hcd(hcd)) {
+                if (hcd->irq >= 0)
+                        free_irq(hcd->irq, hcd);
+        }
 
         usb_put_dev(hcd->self.root_hub);
         usb_deregister_bus(&hcd->self);
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 19d3435e6140..564eaa5525d7 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -82,6 +82,10 @@ struct usb_hub {
         void                    **port_owners;
 };
 
+static inline int hub_is_superspeed(struct usb_device *hdev)
+{
+        return (hdev->descriptor.bDeviceProtocol == 3);
+}
 
 /* Protect struct usb_device->state and ->children members
  * Note: Both are also protected by ->dev.sem, except that ->state can
@@ -151,14 +155,14 @@ EXPORT_SYMBOL_GPL(ehci_cf_port_reset_rwsem);
 
 static int usb_reset_and_verify_device(struct usb_device *udev);
 
-static inline char *portspeed(int portstatus)
+static inline char *portspeed(struct usb_hub *hub, int portstatus)
 {
+        if (hub_is_superspeed(hub->hdev))
+                return "5.0 Gb/s";
         if (portstatus & USB_PORT_STAT_HIGH_SPEED)
                 return "480 Mb/s";
         else if (portstatus & USB_PORT_STAT_LOW_SPEED)
                 return "1.5 Mb/s";
-        else if (portstatus & USB_PORT_STAT_SUPER_SPEED)
-                return "5.0 Gb/s";
         else
                 return "12 Mb/s";
 }
@@ -172,14 +176,23 @@ static struct usb_hub *hdev_to_hub(struct usb_device *hdev)
 }
 
 /* USB 2.0 spec Section 11.24.4.5 */
-static int get_hub_descriptor(struct usb_device *hdev, void *data, int size)
+static int get_hub_descriptor(struct usb_device *hdev, void *data)
 {
-        int i, ret;
+        int i, ret, size;
+        unsigned dtype;
+
+        if (hub_is_superspeed(hdev)) {
+                dtype = USB_DT_SS_HUB;
+                size = USB_DT_SS_HUB_SIZE;
+        } else {
+                dtype = USB_DT_HUB;
+                size = sizeof(struct usb_hub_descriptor);
+        }
 
         for (i = 0; i < 3; i++) {
                 ret = usb_control_msg(hdev, usb_rcvctrlpipe(hdev, 0),
                         USB_REQ_GET_DESCRIPTOR, USB_DIR_IN | USB_RT_HUB,
-                        USB_DT_HUB << 8, 0, data, size,
+                        dtype << 8, 0, data, size,
                         USB_CTRL_GET_TIMEOUT);
                 if (ret >= (USB_DT_HUB_NONVAR_SIZE + 2))
                         return ret;
@@ -365,6 +378,16 @@ static int hub_port_status(struct usb_hub *hub, int port1,
         } else {
                 *status = le16_to_cpu(hub->status->port.wPortStatus);
                 *change = le16_to_cpu(hub->status->port.wPortChange);
+
+                if ((hub->hdev->parent != NULL) &&
+                                hub_is_superspeed(hub->hdev)) {
+                        /* Translate the USB 3 port status */
+                        u16 tmp = *status & USB_SS_PORT_STAT_MASK;
+                        if (*status & USB_SS_PORT_STAT_POWER)
+                                tmp |= USB_PORT_STAT_POWER;
+                        *status = tmp;
+                }
+
                 ret = 0;
         }
         mutex_unlock(&hub->status_mutex);
@@ -607,7 +630,7 @@ static int hub_port_disable(struct usb_hub *hub, int port1, int set_state)
         if (hdev->children[port1-1] && set_state)
                 usb_set_device_state(hdev->children[port1-1],
                                 USB_STATE_NOTATTACHED);
-        if (!hub->error)
+        if (!hub->error && !hub_is_superspeed(hub->hdev))
                 ret = clear_port_feature(hdev, port1, USB_PORT_FEAT_ENABLE);
         if (ret)
                 dev_err(hub->intfdev, "cannot disable port %d (err = %d)\n",
@@ -616,7 +639,7 @@ static int hub_port_disable(struct usb_hub *hub, int port1, int set_state)
 }
 
 /*
- * Disable a port and mark a logical connnect-change event, so that some
+ * Disable a port and mark a logical connect-change event, so that some
  * time later khubd will disconnect() any existing usb_device on the port
  * and will re-enumerate if there actually is a device attached.
  */
@@ -769,12 +792,8 @@ static void hub_activate(struct usb_hub *hub, enum hub_activation_type type)
                          * USB3 protocol ports will automatically transition
                          * to Enabled state when detect an USB3.0 device attach.
                          * Do not disable USB3 protocol ports.
-                         * FIXME: USB3 root hub and external hubs are treated
-                         * differently here.
                          */
-                        if (hdev->descriptor.bDeviceProtocol != 3 ||
-                            (!hdev->parent &&
-                             !(portstatus & USB_PORT_STAT_SUPER_SPEED))) {
+                        if (!hub_is_superspeed(hdev)) {
                                 clear_port_feature(hdev, port1,
                                                    USB_PORT_FEAT_ENABLE);
                                 portstatus &= ~USB_PORT_STAT_ENABLE;
@@ -795,6 +814,11 @@ static void hub_activate(struct usb_hub *hub, enum hub_activation_type type)
                         clear_port_feature(hub->hdev, port1,
                                         USB_PORT_FEAT_C_ENABLE);
                 }
+                if (portchange & USB_PORT_STAT_C_LINK_STATE) {
+                        need_debounce_delay = true;
+                        clear_port_feature(hub->hdev, port1,
+                                        USB_PORT_FEAT_C_PORT_LINK_STATE);
+                }
 
                 /* We can forget about a "removed" device when there's a
                  * physical disconnect or the connect status changes.
@@ -964,12 +988,23 @@ static int hub_configure(struct usb_hub *hub,
                 goto fail;
         }
 
+        if (hub_is_superspeed(hdev) && (hdev->parent != NULL)) {
+                ret = usb_control_msg(hdev, usb_sndctrlpipe(hdev, 0),
+                                HUB_SET_DEPTH, USB_RT_HUB,
+                                hdev->level - 1, 0, NULL, 0,
+                                USB_CTRL_SET_TIMEOUT);
+
+                if (ret < 0) {
+                        message = "can't set hub depth";
+                        goto fail;
+                }
+        }
+
         /* Request the entire hub descriptor.
          * hub->descriptor can handle USB_MAXCHILDREN ports,
          * but the hub can/will return fewer bytes here.
          */
-        ret = get_hub_descriptor(hdev, hub->descriptor,
-                        sizeof(*hub->descriptor));
+        ret = get_hub_descriptor(hdev, hub->descriptor);
         if (ret < 0) {
                 message = "can't read hub descriptor";
                 goto fail;
@@ -991,12 +1026,14 @@ static int hub_configure(struct usb_hub *hub,
 
         wHubCharacteristics = le16_to_cpu(hub->descriptor->wHubCharacteristics);
 
-        if (wHubCharacteristics & HUB_CHAR_COMPOUND) {
+        /* FIXME for USB 3.0, skip for now */
+        if ((wHubCharacteristics & HUB_CHAR_COMPOUND) &&
+                        !(hub_is_superspeed(hdev))) {
                 int     i;
                 char    portstr [USB_MAXCHILDREN + 1];
 
                 for (i = 0; i < hdev->maxchild; i++)
-                        portstr[i] = hub->descriptor->DeviceRemovable
+                        portstr[i] = hub->descriptor->u.hs.DeviceRemovable
                                     [((i + 1) / 8)] & (1 << ((i + 1) % 8))
                                 ? 'F' : 'R';
                 portstr[hdev->maxchild] = 0;
@@ -1253,8 +1290,14 @@ static int hub_probe(struct usb_interface *intf, const struct usb_device_id *id)
         desc = intf->cur_altsetting;
         hdev = interface_to_usbdev(intf);
 
-        /* Hubs have proper suspend/resume support */
-        usb_enable_autosuspend(hdev);
+        /* Hubs have proper suspend/resume support.  USB 3.0 device suspend is
+         * different from USB 2.0/1.1 device suspend, and unfortunately we
+         * don't support it yet.  So leave autosuspend disabled for USB 3.0
+         * external hubs for now.  Enable autosuspend for USB 3.0 roothubs,
+         * since that isn't a "real" hub.
+         */
+        if (!hub_is_superspeed(hdev) || !hdev->parent)
+                usb_enable_autosuspend(hdev);
 
         if (hdev->level == MAX_TOPO_LEVEL) {
                 dev_err(&intf->dev,
@@ -1501,6 +1544,13 @@ void usb_set_device_state(struct usb_device *udev,
 EXPORT_SYMBOL_GPL(usb_set_device_state);
 
 /*
+ * Choose a device number.
+ *
+ * Device numbers are used as filenames in usbfs.  On USB-1.1 and
+ * USB-2.0 buses they are also used as device addresses, however on
+ * USB-3.0 buses the address is assigned by the controller hardware
+ * and it usually is not the same as the device number.
+ *
  * WUSB devices are simple: they have no hubs behind, so the mapping
  * device <-> virtual port number becomes 1:1. Why? to simplify the
  * life of the device connection logic in
@@ -1522,7 +1572,7 @@ EXPORT_SYMBOL_GPL(usb_set_device_state);
  * the HCD must setup data structures before issuing a set address
  * command to the hardware.
  */
-static void choose_address(struct usb_device *udev)
+static void choose_devnum(struct usb_device *udev)
 {
         int             devnum;
         struct usb_bus  *bus = udev->bus;
@@ -1547,7 +1597,7 @@ static void choose_address(struct usb_device *udev)
         }
 }
 
-static void release_address(struct usb_device *udev)
+static void release_devnum(struct usb_device *udev)
 {
         if (udev->devnum > 0) {
                 clear_bit(udev->devnum, udev->bus->devmap.devicemap);
@@ -1555,7 +1605,7 @@ static void release_address(struct usb_device *udev)
         }
 }
 
-static void update_address(struct usb_device *udev, int devnum)
+static void update_devnum(struct usb_device *udev, int devnum)
 {
         /* The address for a WUSB device is managed by wusbcore. */
         if (!udev->wusb)
@@ -1602,7 +1652,8 @@ void usb_disconnect(struct usb_device **pdev)
          * this quiesces everyting except pending urbs.
          */
         usb_set_device_state(udev, USB_STATE_NOTATTACHED);
-        dev_info (&udev->dev, "USB disconnect, address %d\n", udev->devnum);
+        dev_info(&udev->dev, "USB disconnect, device number %d\n",
+                        udev->devnum);
 
         usb_lock_device(udev);
 
@@ -1632,7 +1683,7 @@ void usb_disconnect(struct usb_device **pdev)
         /* Free the device number and delete the parent's children[]
          * (or root_hub) pointer.
          */
-        release_address(udev);
+        release_devnum(udev);
 
         /* Avoid races with recursively_mark_NOTATTACHED() */
         spin_lock_irq(&device_state_lock);
@@ -2017,7 +2068,7 @@ static int hub_port_wait_reset(struct usb_hub *hub, int port1,
                     (portstatus & USB_PORT_STAT_ENABLE)) {
                         if (hub_is_wusb(hub))
                                 udev->speed = USB_SPEED_WIRELESS;
-                        else if (portstatus & USB_PORT_STAT_SUPER_SPEED)
+                        else if (hub_is_superspeed(hub->hdev))
                                 udev->speed = USB_SPEED_SUPER;
                         else if (portstatus & USB_PORT_STAT_HIGH_SPEED)
                                 udev->speed = USB_SPEED_HIGH;
@@ -2073,7 +2124,7 @@ static int hub_port_reset(struct usb_hub *hub, int port1,
                 case 0:
                         /* TRSTRCY = 10 ms; plus some extra */
                         msleep(10 + 40);
-                        update_address(udev, 0);
+                        update_devnum(udev, 0);
                         if (hcd->driver->reset_device) {
                                 status = hcd->driver->reset_device(hcd, udev);
                                 if (status < 0) {
@@ -2636,7 +2687,7 @@ static int hub_set_address(struct usb_device *udev, int devnum)
                                 USB_REQ_SET_ADDRESS, 0, devnum, 0,
                                 NULL, 0, USB_CTRL_SET_TIMEOUT);
         if (retval == 0) {
-                update_address(udev, devnum);
+                update_devnum(udev, devnum);
                 /* Device now using proper address. */
                 usb_set_device_state(udev, USB_STATE_ADDRESS);
                 usb_ep0_reinit(udev);
@@ -2741,9 +2792,9 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1,
         }
         if (udev->speed != USB_SPEED_SUPER)
                 dev_info(&udev->dev,
-                                "%s %s speed %sUSB device using %s and address %d\n",
+                                "%s %s speed %sUSB device number %d using %s\n",
                                 (udev->config) ? "reset" : "new", speed, type,
-                                udev->bus->controller->driver->name, devnum);
+                                devnum, udev->bus->controller->driver->name);
 
         /* Set up TT records, if needed  */
         if (hdev->tt) {
@@ -2773,10 +2824,6 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1,
          * value.
          */
         for (i = 0; i < GET_DESCRIPTOR_TRIES; (++i, msleep(100))) {
-                /*
-                 * An xHCI controller cannot send any packets to a device until
-                 * a set address command successfully completes.
-                 */
                 if (USE_NEW_SCHEME(retry_counter) && !(hcd->driver->flags & HCD_USB3)) {
                         struct usb_device_descriptor *buf;
                         int r = 0;
@@ -2859,9 +2906,9 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1,
                         if (udev->speed == USB_SPEED_SUPER) {
                                 devnum = udev->devnum;
                                 dev_info(&udev->dev,
-                                                "%s SuperSpeed USB device using %s and address %d\n",
+                                                "%s SuperSpeed USB device number %d using %s\n",
                                                 (udev->config) ? "reset" : "new",
-                                                udev->bus->controller->driver->name, devnum);
+                                                devnum, udev->bus->controller->driver->name);
                         }
 
                         /* cope with hardware quirkiness:
@@ -2924,7 +2971,7 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1,
 fail:
         if (retval) {
                 hub_port_disable(hub, port1, 0);
-                update_address(udev, devnum);   /* for disconnect processing */
+                update_devnum(udev, devnum);    /* for disconnect processing */
         }
         mutex_unlock(&usb_address0_mutex);
         return retval;
@@ -3015,7 +3062,7 @@ static void hub_port_connect_change(struct usb_hub *hub, int port1,
 
         dev_dbg (hub_dev,
                 "port %d, status %04x, change %04x, %s\n",
-                port1, portstatus, portchange, portspeed (portstatus));
+                port1, portstatus, portchange, portspeed(hub, portstatus));
 
         if (hub->has_indicators) {
                 set_port_led(hub, port1, HUB_LED_AUTO);
@@ -3116,32 +3163,13 @@ static void hub_port_connect_change(struct usb_hub *hub, int port1,
                 udev->level = hdev->level + 1;
                 udev->wusb = hub_is_wusb(hub);
 
-                /*
-                 * USB 3.0 devices are reset automatically before the connect
-                 * port status change appears, and the root hub port status
-                 * shows the correct speed.  We also get port change
-                 * notifications for USB 3.0 devices from the USB 3.0 portion of
-                 * an external USB 3.0 hub, but this isn't handled correctly yet
-                 * FIXME.
-                 */
-
-                if (!(hcd->driver->flags & HCD_USB3))
-                        udev->speed = USB_SPEED_UNKNOWN;
-                else if ((hdev->parent == NULL) &&
-                                (portstatus & USB_PORT_STAT_SUPER_SPEED))
+                /* Only USB 3.0 devices are connected to SuperSpeed hubs. */
+                if (hub_is_superspeed(hub->hdev))
                         udev->speed = USB_SPEED_SUPER;
                 else
                         udev->speed = USB_SPEED_UNKNOWN;
 
-                /*
-                 * Set the address.
-                 * Note xHCI needs to issue an address device command later
-                 * in the hub_port_init sequence for SS/HS/FS/LS devices,
-                 * and xHC will assign an address to the device. But use
-                 * kernel assigned address here, to avoid any address conflict
-                 * issue.
-                 */
-                choose_address(udev);
+                choose_devnum(udev);
                 if (udev->devnum <= 0) {
                         status = -ENOTCONN;     /* Don't retry */
                         goto loop;
@@ -3233,7 +3261,7 @@ loop_disable:
                 hub_port_disable(hub, port1, 1);
 loop:
                 usb_ep0_reinit(udev);
-                release_address(udev);
+                release_devnum(udev);
                 hub_free_dev(udev);
                 usb_put_dev(udev);
                 if ((status == -ENOTCONN) || (status == -ENOTSUPP))
@@ -3410,12 +3438,19 @@ static void hub_events(void)
                         }
                         
                         if (portchange & USB_PORT_STAT_C_OVERCURRENT) {
-                                dev_err (hub_dev,
-                                        "over-current change on port %d\n",
-                                        i);
+                                u16 status = 0;
+                                u16 unused;
+
+                                dev_dbg(hub_dev, "over-current change on port "
+                                        "%d\n", i);
                                 clear_port_feature(hdev, i,
                                         USB_PORT_FEAT_C_OVER_CURRENT);
+                                msleep(100);    /* Cool down */
                                 hub_power_on(hub, true);
+                                hub_port_status(hub, i, &status, &unused);
+                                if (status & USB_PORT_STAT_OVERCURRENT)
+                                        dev_err(hub_dev, "over-current "
+                                                "condition on port %d\n", i);
                         }
 
                         if (portchange & USB_PORT_STAT_C_RESET) {
@@ -3425,6 +3460,25 @@ static void hub_events(void)
                                 clear_port_feature(hdev, i,
                                         USB_PORT_FEAT_C_RESET);
                         }
+                        if ((portchange & USB_PORT_STAT_C_BH_RESET) &&
+                                        hub_is_superspeed(hub->hdev)) {
+                                dev_dbg(hub_dev,
+                                        "warm reset change on port %d\n",
+                                        i);
+                                clear_port_feature(hdev, i,
+                                        USB_PORT_FEAT_C_BH_PORT_RESET);
+                        }
+                        if (portchange & USB_PORT_STAT_C_LINK_STATE) {
+                                clear_port_feature(hub->hdev, i,
+                                                USB_PORT_FEAT_C_PORT_LINK_STATE);
+                        }
+                        if (portchange & USB_PORT_STAT_C_CONFIG_ERROR) {
+                                dev_warn(hub_dev,
+                                        "config error on port %d\n",
+                                        i);
+                                clear_port_feature(hub->hdev, i,
+                                                USB_PORT_FEAT_C_PORT_CONFIG_ERROR);
+                        }
 
                         if (connect_change)
                                 hub_port_connect_change(hub, i,
@@ -3447,10 +3501,17 @@ static void hub_events(void)
                                         hub->limited_power = 0;
                         }
                         if (hubchange & HUB_CHANGE_OVERCURRENT) {
-                                dev_dbg (hub_dev, "overcurrent change\n");
-                                msleep(500);    /* Cool down */
+                                u16 status = 0;
+                                u16 unused;
+
+                                dev_dbg(hub_dev, "over-current change\n");
                                 clear_hub_feature(hdev, C_HUB_OVER_CURRENT);
+                                msleep(500);    /* Cool down */
                                 hub_power_on(hub, true);
+                                hub_hub_status(hub, &status, &unused);
+                                if (status & HUB_STATUS_OVERCURRENT)
+                                        dev_err(hub_dev, "over-current "
+                                                "condition\n");
                         }
                 }
 
@@ -3699,13 +3760,13 @@ static int usb_reset_and_verify_device(struct usb_device *udev)
         if (!udev->actconfig)
                 goto done;
 
-        mutex_lock(&hcd->bandwidth_mutex);
+        mutex_lock(hcd->bandwidth_mutex);
         ret = usb_hcd_alloc_bandwidth(udev, udev->actconfig, NULL, NULL);
         if (ret < 0) {
                 dev_warn(&udev->dev,
                                 "Busted HC?  Not enough HCD resources for "
                                 "old configuration.\n");
-                mutex_unlock(&hcd->bandwidth_mutex);
+                mutex_unlock(hcd->bandwidth_mutex);
                 goto re_enumerate;
         }
         ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
@@ -3716,10 +3777,10 @@ static int usb_reset_and_verify_device(struct usb_device *udev)
                 dev_err(&udev->dev,
                         "can't restore configuration #%d (error=%d)\n",
                         udev->actconfig->desc.bConfigurationValue, ret);
-                mutex_unlock(&hcd->bandwidth_mutex);
+                mutex_unlock(hcd->bandwidth_mutex);
                 goto re_enumerate;
         }
-        mutex_unlock(&hcd->bandwidth_mutex);
+        mutex_unlock(hcd->bandwidth_mutex);
         usb_set_device_state(udev, USB_STATE_CONFIGURED);
 
         /* Put interfaces back into the same altsettings as before.
diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c
index 832487423826..5701e857392b 100644
--- a/drivers/usb/core/message.c
+++ b/drivers/usb/core/message.c
@@ -1284,12 +1284,12 @@ int usb_set_interface(struct usb_device *dev, int interface, int alternate)
         /* Make sure we have enough bandwidth for this alternate interface.
          * Remove the current alt setting and add the new alt setting.
          */
-        mutex_lock(&hcd->bandwidth_mutex);
+        mutex_lock(hcd->bandwidth_mutex);
         ret = usb_hcd_alloc_bandwidth(dev, NULL, iface->cur_altsetting, alt);
         if (ret < 0) {
                 dev_info(&dev->dev, "Not enough bandwidth for altsetting %d\n",
                                 alternate);
-                mutex_unlock(&hcd->bandwidth_mutex);
+                mutex_unlock(hcd->bandwidth_mutex);
                 return ret;
         }
 
@@ -1311,10 +1311,10 @@ int usb_set_interface(struct usb_device *dev, int interface, int alternate)
         } else if (ret < 0) {
                 /* Re-instate the old alt setting */
                 usb_hcd_alloc_bandwidth(dev, NULL, alt, iface->cur_altsetting);
-                mutex_unlock(&hcd->bandwidth_mutex);
+                mutex_unlock(hcd->bandwidth_mutex);
                 return ret;
         }
-        mutex_unlock(&hcd->bandwidth_mutex);
+        mutex_unlock(hcd->bandwidth_mutex);
 
         /* FIXME drivers shouldn't need to replicate/bugfix the logic here
          * when they implement async or easily-killable versions of this or
@@ -1413,7 +1413,7 @@ int usb_reset_configuration(struct usb_device *dev)
 
         config = dev->actconfig;
         retval = 0;
-        mutex_lock(&hcd->bandwidth_mutex);
+        mutex_lock(hcd->bandwidth_mutex);
         /* Make sure we have enough bandwidth for each alternate setting 0 */
         for (i = 0; i < config->desc.bNumInterfaces; i++) {
                 struct usb_interface *intf = config->interface[i];
@@ -1442,7 +1442,7 @@ reset_old_alts:
                                 usb_hcd_alloc_bandwidth(dev, NULL,
                                                 alt, intf->cur_altsetting);
                 }
-                mutex_unlock(&hcd->bandwidth_mutex);
+                mutex_unlock(hcd->bandwidth_mutex);
                 return retval;
         }
         retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
@@ -1451,7 +1451,7 @@ reset_old_alts:
                         NULL, 0, USB_CTRL_SET_TIMEOUT);
         if (retval < 0)
                 goto reset_old_alts;
-        mutex_unlock(&hcd->bandwidth_mutex);
+        mutex_unlock(hcd->bandwidth_mutex);
 
         /* re-init hc/hcd interface/endpoint state */
         for (i = 0; i < config->desc.bNumInterfaces; i++) {
@@ -1739,10 +1739,10 @@ free_interfaces:
          * host controller will not allow submissions to dropped endpoints.  If
          * this call fails, the device state is unchanged.
          */
-        mutex_lock(&hcd->bandwidth_mutex);
+        mutex_lock(hcd->bandwidth_mutex);
         ret = usb_hcd_alloc_bandwidth(dev, cp, NULL, NULL);
         if (ret < 0) {
-                mutex_unlock(&hcd->bandwidth_mutex);
+                mutex_unlock(hcd->bandwidth_mutex);
                 usb_autosuspend_device(dev);
                 goto free_interfaces;
         }
@@ -1761,11 +1761,11 @@ free_interfaces:
         if (!cp) {
                 usb_set_device_state(dev, USB_STATE_ADDRESS);
                 usb_hcd_alloc_bandwidth(dev, NULL, NULL, NULL);
-                mutex_unlock(&hcd->bandwidth_mutex);
+                mutex_unlock(hcd->bandwidth_mutex);
                 usb_autosuspend_device(dev);
                 goto free_interfaces;
         }
-        mutex_unlock(&hcd->bandwidth_mutex);
+        mutex_unlock(hcd->bandwidth_mutex);
         usb_set_device_state(dev, USB_STATE_CONFIGURED);
 
         /* Initialize the new interface structures and the
diff --git a/drivers/usb/core/urb.c b/drivers/usb/core/urb.c
index c14fc082864f..ae334b067c13 100644
--- a/drivers/usb/core/urb.c
+++ b/drivers/usb/core/urb.c
@@ -366,7 +366,16 @@ int usb_submit_urb(struct urb *urb, gfp_t mem_flags)
         if (xfertype == USB_ENDPOINT_XFER_ISOC) {
                 int     n, len;
 
-                /* FIXME SuperSpeed isoc endpoints have up to 16 bursts */
+                /* SuperSpeed isoc endpoints have up to 16 bursts of up to
+                 * 3 packets each
+                 */
+                if (dev->speed == USB_SPEED_SUPER) {
+                        int     burst = 1 + ep->ss_ep_comp.bMaxBurst;
+                        int     mult = USB_SS_MULT(ep->ss_ep_comp.bmAttributes);
+                        max *= burst;
+                        max *= mult;
+                }
+
                 /* "high bandwidth" mode, 1-3 packets/uframe? */
                 if (dev->speed == USB_SPEED_HIGH) {
                         int     mult = 1 + ((max >> 11) & 0x03);
diff --git a/drivers/usb/core/usb.h b/drivers/usb/core/usb.h
index b975450f403e..a9cf484ecae4 100644
--- a/drivers/usb/core/usb.h
+++ b/drivers/usb/core/usb.h
@@ -122,6 +122,19 @@ static inline int is_usb_device_driver(struct device_driver *drv)
                         for_devices;
 }
 
+/* translate USB error codes to codes user space understands */
+static inline int usb_translate_errors(int error_code)
+{
+        switch (error_code) {
+        case 0:
+        case -ENOMEM:
+        case -ENODEV:
+                return error_code;
+        default:
+                return -EIO;
+        }
+}
+
 
 /* for labeling diagnostics */
 extern const char *usbcore_name;