5 files changed, 37 insertions, 15 deletions

diff --git a/drivers/usb/core/devices.c b/drivers/usb/core/devices.c
index 96f1171..355dffc 100644
--- a/drivers/usb/core/devices.c
+++ b/drivers/usb/core/devices.c
@@ -494,7 +494,7 @@ static ssize_t usb_device_dump(char __user **buffer, size_t *nbytes,
 		return 0;
 	/* allocate 2^1 pages = 8K (on i386);
 	 * should be more than enough for one device */
-	pages_start = (char *)__get_free_pages(GFP_KERNEL, 1);
+	pages_start = (char *)__get_free_pages(GFP_NOIO, 1);
 	if (!pages_start)
 		return -ENOMEM;
 
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index 0495fa6..80995ef 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -1684,6 +1684,24 @@ int usb_hcd_alloc_bandwidth(struct usb_device *udev,
 		}
 	}
 	if (cur_alt && new_alt) {
+		struct usb_interface *iface = usb_ifnum_to_if(udev,
+				cur_alt->desc.bInterfaceNumber);
+
+		if (iface->resetting_device) {
+			/*
+			 * The USB core just reset the device, so the xHCI host
+			 * and the device will think alt setting 0 is installed.
+			 * However, the USB core will pass in the alternate
+			 * setting installed before the reset as cur_alt.  Dig
+			 * out the alternate setting 0 structure, or the first
+			 * alternate setting if a broken device doesn't have alt
+			 * setting 0.
+			 */
+			cur_alt = usb_altnum_to_altsetting(iface, 0);
+			if (!cur_alt)
+				cur_alt = &iface->altsetting[0];
+		}
+
 		/* Drop all the endpoints in the current alt setting */
 		for (i = 0; i < cur_alt->desc.bNumEndpoints; i++) {
 			ret = hcd->driver->drop_endpoint(hcd, udev,
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 0cec6ca..35cc8b9 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -3347,6 +3347,9 @@ static void hub_events(void)
 					USB_PORT_FEAT_C_SUSPEND);
 				udev = hdev->children[i-1];
 				if (udev) {
+					/* TRSMRCY = 10 msec */
+					msleep(10);
+
 					usb_lock_device(udev);
 					ret = remote_wakeup(hdev->
 							children[i-1]);
@@ -3692,19 +3695,14 @@ static int usb_reset_and_verify_device(struct usb_device *udev)
 			usb_enable_interface(udev, intf, true);
 			ret = 0;
 		} else {
-			/* We've just reset the device, so it will think alt
-			 * setting 0 is installed.  For usb_set_interface() to
-			 * work properly, we need to set the current alternate
-			 * interface setting to 0 (or the first alt setting, if
-			 * the device doesn't have alt setting 0).
+			/* Let the bandwidth allocation function know that this
+			 * device has been reset, and it will have to use
+			 * alternate setting 0 as the current alternate setting.
 			 */
-			intf->cur_altsetting =
-				usb_find_alt_setting(config, i, 0);
-			if (!intf->cur_altsetting)
-				intf->cur_altsetting =
-					&config->intf_cache[i]->altsetting[0];
+			intf->resetting_device = 1;
 			ret = usb_set_interface(udev, desc->bInterfaceNumber,
 					desc->bAlternateSetting);
+			intf->resetting_device = 0;
 		}
 		if (ret < 0) {
 			dev_err(&udev->dev, "failed to restore interface %d "
diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c
index 1b99484..9bc95fe 100644
--- a/drivers/usb/core/message.c
+++ b/drivers/usb/core/message.c
@@ -906,11 +906,11 @@ char *usb_cache_string(struct usb_device *udev, int index)
 	if (index <= 0)
 		return NULL;
 
-	buf = kmalloc(MAX_USB_STRING_SIZE, GFP_KERNEL);
+	buf = kmalloc(MAX_USB_STRING_SIZE, GFP_NOIO);
 	if (buf) {
 		len = usb_string(udev, index, buf, MAX_USB_STRING_SIZE);
 		if (len > 0) {
-			smallbuf = kmalloc(++len, GFP_KERNEL);
+			smallbuf = kmalloc(++len, GFP_NOIO);
 			if (!smallbuf)
 				return buf;
 			memcpy(smallbuf, buf, len);
@@ -1731,7 +1731,7 @@ int usb_set_configuration(struct usb_device *dev, int configuration)
 	if (cp) {
 		nintf = cp->desc.bNumInterfaces;
 		new_interfaces = kmalloc(nintf * sizeof(*new_interfaces),
-				GFP_KERNEL);
+				GFP_NOIO);
 		if (!new_interfaces) {
 			dev_err(&dev->dev, "Out of memory\n");
 			return -ENOMEM;
@@ -1740,7 +1740,7 @@ int usb_set_configuration(struct usb_device *dev, int configuration)
 		for (; n < nintf; ++n) {
 			new_interfaces[n] = kzalloc(
 					sizeof(struct usb_interface),
-					GFP_KERNEL);
+					GFP_NOIO);
 			if (!new_interfaces[n]) {
 				dev_err(&dev->dev, "Out of memory\n");
 				ret = -ENOMEM;
diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c
index 485edf9..5f3908f 100644
--- a/drivers/usb/core/sysfs.c
+++ b/drivers/usb/core/sysfs.c
@@ -115,6 +115,12 @@ show_speed(struct device *dev, struct device_attribute *attr, char *buf)
 	case USB_SPEED_HIGH:
 		speed = "480";
 		break;
+	case USB_SPEED_VARIABLE:
+		speed = "480";
+		break;
+	case USB_SPEED_SUPER:
+		speed = "5000";
+		break;
 	default:
 		speed = "unknown";
 	}