4 files changed, 44 insertions, 14 deletions

diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
index f1aaff6202a5..045bb4b823e1 100644
--- a/drivers/usb/core/devio.c
+++ b/drivers/usb/core/devio.c
@@ -965,10 +965,11 @@ static int proc_getdriver(struct dev_state *ps, void __user *arg)
 
 static int proc_connectinfo(struct dev_state *ps, void __user *arg)
 {
-        struct usbdevfs_connectinfo ci;
+        struct usbdevfs_connectinfo ci = {
+                .devnum = ps->dev->devnum,
+                .slow = ps->dev->speed == USB_SPEED_LOW
+        };
 
-        ci.devnum = ps->dev->devnum;
-        ci.slow = ps->dev->speed == USB_SPEED_LOW;
         if (copy_to_user(arg, &ci, sizeof(ci)))
                 return -EFAULT;
         return 0;
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index 5cca00a6d09d..b5c965c031f9 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -1945,7 +1945,6 @@ 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");
-        clear_bit(HCD_FLAG_WAKEUP_PENDING, &hcd->flags);
         if (!hcd->driver->bus_resume)
                 return -ENOENT;
         if (hcd->state == HC_STATE_RUNNING)
@@ -1953,6 +1952,7 @@ int hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg)
 
         hcd->state = HC_STATE_RESUMING;
         status = hcd->driver->bus_resume(hcd);
+        clear_bit(HCD_FLAG_WAKEUP_PENDING, &hcd->flags);
         if (status == 0) {
                 /* TRSMRCY = 10 msec */
                 msleep(10);
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 84c1897188d2..6c16c4f2c741 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -677,6 +677,8 @@ static void hub_init_func3(struct work_struct *ws);
 static void hub_activate(struct usb_hub *hub, enum hub_activation_type type)
 {
         struct usb_device *hdev = hub->hdev;
+        struct usb_hcd *hcd;
+        int ret;
         int port1;
         int status;
         bool need_debounce_delay = false;
@@ -715,6 +717,25 @@ static void hub_activate(struct usb_hub *hub, enum hub_activation_type type)
                         usb_autopm_get_interface_no_resume(
                                         to_usb_interface(hub->intfdev));
                         return;         /* Continues at init2: below */
+                } else if (type == HUB_RESET_RESUME) {
+                        /* The internal host controller state for the hub device
+                         * may be gone after a host power loss on system resume.
+                         * Update the device's info so the HW knows it's a hub.
+                         */
+                        hcd = bus_to_hcd(hdev->bus);
+                        if (hcd->driver->update_hub_device) {
+                                ret = hcd->driver->update_hub_device(hcd, hdev,
+                                                &hub->tt, GFP_NOIO);
+                                if (ret < 0) {
+                                        dev_err(hub->intfdev, "Host not "
+                                                        "accepting hub info "
+                                                        "update.\n");
+                                        dev_err(hub->intfdev, "LS/FS devices "
+                                                        "and hubs may not work "
+                                                        "under this hub\n.");
+                                }
+                        }
+                        hub_power_on(hub, true);
                 } else {
                         hub_power_on(hub, true);
                 }
@@ -2722,6 +2743,11 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1,
                 udev->ttport = hdev->ttport;
         } else if (udev->speed != USB_SPEED_HIGH
                         && hdev->speed == USB_SPEED_HIGH) {
+                if (!hub->tt.hub) {
+                        dev_err(&udev->dev, "parent hub has no TT\n");
+                        retval = -EINVAL;
+                        goto fail;
+                }
                 udev->tt = &hub->tt;
                 udev->ttport = port1;
         }
@@ -2860,13 +2886,16 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1,
         else
                 i = udev->descriptor.bMaxPacketSize0;
         if (le16_to_cpu(udev->ep0.desc.wMaxPacketSize) != i) {
-                if (udev->speed != USB_SPEED_FULL ||
+                if (udev->speed == USB_SPEED_LOW ||
                                 !(i == 8 || i == 16 || i == 32 || i == 64)) {
-                        dev_err(&udev->dev, "ep0 maxpacket = %d\n", i);
+                        dev_err(&udev->dev, "Invalid ep0 maxpacket: %d\n", i);
                         retval = -EMSGSIZE;
                         goto fail;
                 }
-                dev_dbg(&udev->dev, "ep0 maxpacket = %d\n", i);
+                if (udev->speed == USB_SPEED_FULL)
+                        dev_dbg(&udev->dev, "ep0 maxpacket = %d\n", i);
+                else
+                        dev_warn(&udev->dev, "Using ep0 maxpacket: %d\n", i);
                 udev->ep0.desc.wMaxPacketSize = cpu_to_le16(i);
                 usb_ep0_reinit(udev);
         }
diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c
index 9f0ce7de0e36..d6e3e410477e 100644
--- a/drivers/usb/core/message.c
+++ b/drivers/usb/core/message.c
@@ -1140,13 +1140,6 @@ void usb_disable_device(struct usb_device *dev, int skip_ep0)
 {
         int i;
 
-        dev_dbg(&dev->dev, "%s nuking %s URBs\n", __func__,
-                skip_ep0 ? "non-ep0" : "all");
-        for (i = skip_ep0; i < 16; ++i) {
-                usb_disable_endpoint(dev, i, true);
-                usb_disable_endpoint(dev, i + USB_DIR_IN, true);
-        }
-
         /* getting rid of interfaces will disconnect
          * any drivers bound to them (a key side effect)
          */
@@ -1176,6 +1169,13 @@ void usb_disable_device(struct usb_device *dev, int skip_ep0)
                 if (dev->state == USB_STATE_CONFIGURED)
                         usb_set_device_state(dev, USB_STATE_ADDRESS);
         }
+
+        dev_dbg(&dev->dev, "%s nuking %s URBs\n", __func__,
+                skip_ep0 ? "non-ep0" : "all");
+        for (i = skip_ep0; i < 16; ++i) {
+                usb_disable_endpoint(dev, i, true);
+                usb_disable_endpoint(dev, i + USB_DIR_IN, true);
+        }
 }
 
 /**