1 files changed, 39 insertions, 31 deletions

diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index 49d685ad0da9..dd74c99d6ce1 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -315,6 +315,9 @@ void usb_remove_function(struct usb_configuration *c, struct usb_function *f)
 	list_del(&f->list);
 	if (f->unbind)
 		f->unbind(c, f);
+
+	if (f->bind_deactivated)
+		usb_function_activate(f);
 }
 EXPORT_SYMBOL_GPL(usb_remove_function);
 
@@ -607,7 +610,6 @@ static int count_configs(struct usb_composite_dev *cdev, unsigned type)
 static int bos_desc(struct usb_composite_dev *cdev)
 {
 	struct usb_ext_cap_descriptor	*usb_ext;
-	struct usb_ss_cap_descriptor	*ss_cap;
 	struct usb_dcd_config_params	dcd_config_params;
 	struct usb_bos_descriptor	*bos = cdev->req->buf;
 
@@ -633,29 +635,35 @@ static int bos_desc(struct usb_composite_dev *cdev)
 	 * The Superspeed USB Capability descriptor shall be implemented by all
 	 * SuperSpeed devices.
 	 */
-	ss_cap = cdev->req->buf + le16_to_cpu(bos->wTotalLength);
-	bos->bNumDeviceCaps++;
-	le16_add_cpu(&bos->wTotalLength, USB_DT_USB_SS_CAP_SIZE);
-	ss_cap->bLength = USB_DT_USB_SS_CAP_SIZE;
-	ss_cap->bDescriptorType = USB_DT_DEVICE_CAPABILITY;
-	ss_cap->bDevCapabilityType = USB_SS_CAP_TYPE;
-	ss_cap->bmAttributes = 0; /* LTM is not supported yet */
-	ss_cap->wSpeedSupported = cpu_to_le16(USB_LOW_SPEED_OPERATION |
-				USB_FULL_SPEED_OPERATION |
-				USB_HIGH_SPEED_OPERATION |
-				USB_5GBPS_OPERATION);
-	ss_cap->bFunctionalitySupport = USB_LOW_SPEED_OPERATION;
-
-	/* Get Controller configuration */
-	if (cdev->gadget->ops->get_config_params)
-		cdev->gadget->ops->get_config_params(&dcd_config_params);
-	else {
-		dcd_config_params.bU1devExitLat = USB_DEFAULT_U1_DEV_EXIT_LAT;
-		dcd_config_params.bU2DevExitLat =
-			cpu_to_le16(USB_DEFAULT_U2_DEV_EXIT_LAT);
+	if (gadget_is_superspeed(cdev->gadget)) {
+		struct usb_ss_cap_descriptor *ss_cap;
+
+		ss_cap = cdev->req->buf + le16_to_cpu(bos->wTotalLength);
+		bos->bNumDeviceCaps++;
+		le16_add_cpu(&bos->wTotalLength, USB_DT_USB_SS_CAP_SIZE);
+		ss_cap->bLength = USB_DT_USB_SS_CAP_SIZE;
+		ss_cap->bDescriptorType = USB_DT_DEVICE_CAPABILITY;
+		ss_cap->bDevCapabilityType = USB_SS_CAP_TYPE;
+		ss_cap->bmAttributes = 0; /* LTM is not supported yet */
+		ss_cap->wSpeedSupported = cpu_to_le16(USB_LOW_SPEED_OPERATION |
+						      USB_FULL_SPEED_OPERATION |
+						      USB_HIGH_SPEED_OPERATION |
+						      USB_5GBPS_OPERATION);
+		ss_cap->bFunctionalitySupport = USB_LOW_SPEED_OPERATION;
+
+		/* Get Controller configuration */
+		if (cdev->gadget->ops->get_config_params) {
+			cdev->gadget->ops->get_config_params(
+				&dcd_config_params);
+		} else {
+			dcd_config_params.bU1devExitLat =
+				USB_DEFAULT_U1_DEV_EXIT_LAT;
+			dcd_config_params.bU2DevExitLat =
+				cpu_to_le16(USB_DEFAULT_U2_DEV_EXIT_LAT);
+		}
+		ss_cap->bU1devExitLat = dcd_config_params.bU1devExitLat;
+		ss_cap->bU2DevExitLat = dcd_config_params.bU2DevExitLat;
 	}
-	ss_cap->bU1devExitLat = dcd_config_params.bU1devExitLat;
-	ss_cap->bU2DevExitLat = dcd_config_params.bU2DevExitLat;
 
 	/* The SuperSpeedPlus USB Device Capability descriptor */
 	if (gadget_is_superspeed_plus(cdev->gadget)) {
@@ -956,12 +964,8 @@ static void remove_config(struct usb_composite_dev *cdev,
 
 		f = list_first_entry(&config->functions,
 				struct usb_function, list);
-		list_del(&f->list);
-		if (f->unbind) {
-			DBG(cdev, "unbind function '%s'/%p\n", f->name, f);
-			f->unbind(config, f);
-			/* may free memory for "f" */
-		}
+
+		usb_remove_function(config, f);
 	}
 	list_del(&config->list);
 	if (config->unbind) {
@@ -1603,7 +1607,10 @@ composite_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
 					cdev->desc.bcdUSB = cpu_to_le16(0x0210);
 				}
 			} else {
-				cdev->desc.bcdUSB = cpu_to_le16(0x0200);
+				if (gadget->lpm_capable)
+					cdev->desc.bcdUSB = cpu_to_le16(0x0201);
+				else
+					cdev->desc.bcdUSB = cpu_to_le16(0x0200);
 			}
 
 			value = min(w_length, (u16) sizeof cdev->desc);
@@ -1634,7 +1641,8 @@ composite_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
 				value = min(w_length, (u16) value);
 			break;
 		case USB_DT_BOS:
-			if (gadget_is_superspeed(gadget)) {
+			if (gadget_is_superspeed(gadget) ||
+			    gadget->lpm_capable) {
 				value = bos_desc(cdev);
 				value = min(w_length, (u16) value);
 			}