Merge tag 'usb-3.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

Pull USB patches from Greg Kroah-Hartman:
 "Here's the big USB merge for 3.9-rc1

  Nothing major, lots of gadget fixes, and of course, xhci stuff.

  All of this has been in linux-next for a while, with the exception of
  the last 3 patches, which were reverts of patches in the tree that
  caused problems, they went in yesterday."

* tag 'usb-3.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (190 commits)
  Revert "USB: EHCI: make ehci-vt8500 a separate driver"
  Revert "USB: EHCI: make ehci-orion a separate driver"
  Revert "USB: update host controller Kconfig entries"
  USB: update host controller Kconfig entries
  USB: EHCI: make ehci-orion a separate driver
  USB: EHCI: make ehci-vt8500 a separate driver
  USB: usb-storage: unusual_devs update for Super TOP SATA bridge
  USB: ehci-omap: Fix autoloading of module
  USB: ehci-omap: Don't free gpios that we didn't request
  USB: option: add Huawei "ACM" devices using protocol = vendor
  USB: serial: fix null-pointer dereferences on disconnect
  USB: option: add Yota / Megafon M100-1 4g modem
  drivers/usb: add missing GENERIC_HARDIRQS dependencies
  USB: storage: properly handle the endian issues of idProduct
  testusb: remove all mentions of 'usbfs'
  usb: gadget: imx_udc: make it depend on BROKEN
  usb: omap_control_usb: fix compile warning
  ARM: OMAP: USB: Add phy binding information
  ARM: OMAP2: MUSB: Specify omap4 has mailbox
  ARM: OMAP: devices: create device for usb part of control module
  ...

52 files changed, 1695 insertions, 1425 deletions

diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig
index 14625fd2cec..c5c6fa60910 100644
--- a/drivers/usb/gadget/Kconfig
+++ b/drivers/usb/gadget/Kconfig
@@ -281,6 +281,7 @@ config USB_S3C_HSOTG
 config USB_IMX
 	tristate "Freescale i.MX1 USB Peripheral Controller"
 	depends on ARCH_MXC
+	depends on BROKEN
 	help
 	   Freescale's i.MX1 includes an integrated full speed
 	   USB 1.1 device controller.
@@ -319,6 +320,7 @@ config USB_S3C_HSUDC
 
 config USB_MV_UDC
 	tristate "Marvell USB2.0 Device Controller"
+	depends on GENERIC_HARDIRQS
 	help
 	  Marvell Socs (including PXA and MMP series) include a high speed
 	  USB2.0 OTG controller, which can be configured as high speed or
@@ -440,7 +442,7 @@ config USB_GOKU
 
 config USB_EG20T
 	tristate "Intel EG20T PCH/LAPIS Semiconductor IOH(ML7213/ML7831) UDC"
-	depends on PCI
+	depends on PCI && GENERIC_HARDIRQS
 	help
 	  This is a USB device driver for EG20T PCH.
 	  EG20T PCH is the platform controller hub that is used in Intel's
@@ -500,6 +502,15 @@ config USB_LIBCOMPOSITE
 	tristate
 	depends on USB_GADGET
 
+config USB_F_ACM
+	tristate
+
+config USB_F_SS_LB
+	tristate
+
+config USB_U_SERIAL
+	tristate
+
 choice
 	tristate "USB Gadget Drivers"
 	default USB_ETH
@@ -524,6 +535,7 @@ choice
 config USB_ZERO
 	tristate "Gadget Zero (DEVELOPMENT)"
 	select USB_LIBCOMPOSITE
+	select USB_F_SS_LB
 	help
 	  Gadget Zero is a two-configuration device.  It either sinks and
 	  sources bulk data; or it loops back a configurable number of
@@ -750,6 +762,8 @@ config USB_GADGET_TARGET
 
 config USB_G_SERIAL
 	tristate "Serial Gadget (with CDC ACM and CDC OBEX support)"
+	select USB_U_SERIAL
+	select USB_F_ACM
 	select USB_LIBCOMPOSITE
 	help
 	  The Serial Gadget talks to the Linux-USB generic serial driver.
@@ -803,6 +817,8 @@ config USB_CDC_COMPOSITE
 	tristate "CDC Composite Device (Ethernet and ACM)"
 	depends on NET
 	select USB_LIBCOMPOSITE
+	select USB_U_SERIAL
+	select USB_F_ACM
 	help
 	  This driver provides two functions in one configuration:
 	  a CDC Ethernet (ECM) link, and a CDC ACM (serial port) link.
@@ -818,6 +834,7 @@ config USB_G_NOKIA
 	tristate "Nokia composite gadget"
 	depends on PHONET
 	select USB_LIBCOMPOSITE
+	select USB_U_SERIAL
 	help
 	  The Nokia composite gadget provides support for acm, obex
 	  and phonet in only one composite gadget driver.
@@ -829,6 +846,8 @@ config USB_G_ACM_MS
 	tristate "CDC Composite Device (ACM and mass storage)"
 	depends on BLOCK
 	select USB_LIBCOMPOSITE
+	select USB_U_SERIAL
+	select USB_F_ACM
 	help
 	  This driver provides two functions in one configuration:
 	  a mass storage, and a CDC ACM (serial port) link.
@@ -841,6 +860,8 @@ config USB_G_MULTI
 	depends on BLOCK && NET
 	select USB_G_MULTI_CDC if !USB_G_MULTI_RNDIS
 	select USB_LIBCOMPOSITE
+	select USB_U_SERIAL
+	select USB_F_ACM
 	help
 	  The Multifunction Composite Gadget provides Ethernet (RNDIS
 	  and/or CDC Ethernet), mass storage and ACM serial link
@@ -916,6 +937,7 @@ config USB_G_DBGP_PRINTK
 
 config USB_G_DBGP_SERIAL
 	depends on USB_G_DBGP
+	select USB_U_SERIAL
 	bool "serial"
 	help
 	  Userland can interact using /dev/ttyGSxxx.
diff --git a/drivers/usb/gadget/Makefile b/drivers/usb/gadget/Makefile
index 8b4acfd92aa..97a13c349cc 100644
--- a/drivers/usb/gadget/Makefile
+++ b/drivers/usb/gadget/Makefile
@@ -6,7 +6,7 @@ ccflags-$(CONFIG_USB_GADGET_DEBUG) := -DDEBUG
 obj-$(CONFIG_USB_GADGET)	+= udc-core.o
 obj-$(CONFIG_USB_LIBCOMPOSITE)	+= libcomposite.o
 libcomposite-y			:= usbstring.o config.o epautoconf.o
-libcomposite-y			+= composite.o
+libcomposite-y			+= composite.o functions.o
 obj-$(CONFIG_USB_DUMMY_HCD)	+= dummy_hcd.o
 obj-$(CONFIG_USB_NET2272)	+= net2272.o
 obj-$(CONFIG_USB_NET2280)	+= net2280.o
@@ -74,3 +74,9 @@ obj-$(CONFIG_USB_G_WEBCAM)	+= g_webcam.o
 obj-$(CONFIG_USB_G_NCM)		+= g_ncm.o
 obj-$(CONFIG_USB_G_ACM_MS)	+= g_acm_ms.o
 obj-$(CONFIG_USB_GADGET_TARGET)	+= tcm_usb_gadget.o
+
+# USB Functions
+obj-$(CONFIG_USB_F_ACM)		+= f_acm.o
+f_ss_lb-y			:= f_loopback.o f_sourcesink.o
+obj-$(CONFIG_USB_F_SS_LB)	+= f_ss_lb.o
+obj-$(CONFIG_USB_U_SERIAL)	+= u_serial.o
diff --git a/drivers/usb/gadget/acm_ms.c b/drivers/usb/gadget/acm_ms.c
index 5a7f289805f..8f2b0e39153 100644
--- a/drivers/usb/gadget/acm_ms.c
+++ b/drivers/usb/gadget/acm_ms.c
@@ -40,9 +40,6 @@
  * the runtime footprint, and giving us at least some parts of what
  * a "gcc --combine ... part1.c part2.c part3.c ... " build would.
  */
-
-#include "u_serial.c"
-#include "f_acm.c"
 #include "f_mass_storage.c"
 
 /*-------------------------------------------------------------------------*/
@@ -112,12 +109,15 @@ FSG_MODULE_PARAMETERS(/* no prefix */, fsg_mod_data);
 static struct fsg_common fsg_common;
 
 /*-------------------------------------------------------------------------*/
-
+static unsigned char tty_line;
+static struct usb_function *f_acm;
+static struct usb_function_instance *f_acm_inst;
 /*
  * We _always_ have both ACM and mass storage functions.
  */
 static int __init acm_ms_do_config(struct usb_configuration *c)
 {
+	struct f_serial_opts *opts;
 	int	status;
 
 	if (gadget_is_otg(c->cdev->gadget)) {
@@ -125,16 +125,35 @@ static int __init acm_ms_do_config(struct usb_configuration *c)
 		c->bmAttributes |= USB_CONFIG_ATT_WAKEUP;
 	}
 
+	f_acm_inst = usb_get_function_instance("acm");
+	if (IS_ERR(f_acm_inst))
+		return PTR_ERR(f_acm_inst);
+
+	opts = container_of(f_acm_inst, struct f_serial_opts, func_inst);
+	opts->port_num = tty_line;
+
+	f_acm = usb_get_function(f_acm_inst);
+	if (IS_ERR(f_acm)) {
+		status = PTR_ERR(f_acm);
+		goto err_func;
+	}
 
-	status = acm_bind_config(c, 0);
+	status = usb_add_function(c, f_acm);
 	if (status < 0)
-		return status;
+		goto err_conf;
 
 	status = fsg_bind_config(c->cdev, c, &fsg_common);
 	if (status < 0)
-		return status;
+		goto err_fsg;
 
 	return 0;
+err_fsg:
+	usb_remove_function(c, f_acm);
+err_conf:
+	usb_put_function(f_acm);
+err_func:
+	usb_put_function_instance(f_acm_inst);
+	return status;
 }
 
 static struct usb_configuration acm_ms_config_driver = {
@@ -153,7 +172,7 @@ static int __init acm_ms_bind(struct usb_composite_dev *cdev)
 	void			*retp;
 
 	/* set up serial link layer */
-	status = gserial_setup(cdev->gadget, 1);
+	status = gserial_alloc_line(&tty_line);
 	if (status < 0)
 		return status;
 
@@ -189,14 +208,15 @@ static int __init acm_ms_bind(struct usb_composite_dev *cdev)
 fail1:
 	fsg_common_put(&fsg_common);
 fail0:
-	gserial_cleanup();
+	gserial_free_line(tty_line);
 	return status;
 }
 
 static int __exit acm_ms_unbind(struct usb_composite_dev *cdev)
 {
-	gserial_cleanup();
-
+	usb_put_function(f_acm);
+	usb_put_function_instance(f_acm_inst);
+	gserial_free_line(tty_line);
 	return 0;
 }
 
diff --git a/drivers/usb/gadget/amd5536udc.c b/drivers/usb/gadget/amd5536udc.c
index d9f6b937249..75973f33a4c 100644
--- a/drivers/usb/gadget/amd5536udc.c
+++ b/drivers/usb/gadget/amd5536udc.c
@@ -1400,15 +1400,16 @@ static int udc_wakeup(struct usb_gadget *gadget)
 	return 0;
 }
 
-static int amd5536_start(struct usb_gadget_driver *driver,
-		int (*bind)(struct usb_gadget *, struct usb_gadget_driver *));
-static int amd5536_stop(struct usb_gadget_driver *driver);
+static int amd5536_udc_start(struct usb_gadget *g,
+		struct usb_gadget_driver *driver);
+static int amd5536_udc_stop(struct usb_gadget *g,
+		struct usb_gadget_driver *driver);
 /* gadget operations */
 static const struct usb_gadget_ops udc_ops = {
 	.wakeup		= udc_wakeup,
 	.get_frame	= udc_get_frame,
-	.start		= amd5536_start,
-	.stop		= amd5536_stop,
+	.udc_start	= amd5536_udc_start,
+	.udc_stop	= amd5536_udc_stop,
 };
 
 /* Setups endpoint parameters, adds endpoints to linked list */
@@ -1913,41 +1914,22 @@ static int setup_ep0(struct udc *dev)
 }
 
 /* Called by gadget driver to register itself */
-static int amd5536_start(struct usb_gadget_driver *driver,
-		int (*bind)(struct usb_gadget *, struct usb_gadget_driver *))
+static int amd5536_udc_start(struct usb_gadget *g,
+		struct usb_gadget_driver *driver)
 {
-	struct udc		*dev = udc;
-	int			retval;
+	struct udc *dev = to_amd5536_udc(g);
 	u32 tmp;
 
-	if (!driver || !bind || !driver->setup
-			|| driver->max_speed < USB_SPEED_HIGH)
-		return -EINVAL;
-	if (!dev)
-		return -ENODEV;
-	if (dev->driver)
-		return -EBUSY;
-
 	driver->driver.bus = NULL;
 	dev->driver = driver;
 	dev->gadget.dev.driver = &driver->driver;
 
-	retval = bind(&dev->gadget, driver);
-
 	/* Some gadget drivers use both ep0 directions.
 	 * NOTE: to gadget driver, ep0 is just one endpoint...
 	 */
 	dev->ep[UDC_EP0OUT_IX].ep.driver_data =
 		dev->ep[UDC_EP0IN_IX].ep.driver_data;
 
-	if (retval) {
-		DBG(dev, "binding to %s returning %d\n",
-				driver->driver.name, retval);
-		dev->driver = NULL;
-		dev->gadget.dev.driver = NULL;
-		return retval;
-	}
-
 	/* get ready for ep0 traffic */
 	setup_ep0(dev);
 
@@ -1969,14 +1951,9 @@ __acquires(dev->lock)
 {
 	int tmp;
 
-	if (dev->gadget.speed != USB_SPEED_UNKNOWN) {
-		spin_unlock(&dev->lock);
-		driver->disconnect(&dev->gadget);
-		spin_lock(&dev->lock);
-	}
-
 	/* empty queues and init hardware */
 	udc_basic_init(dev);
+
 	for (tmp = 0; tmp < UDC_EP_NUM; tmp++)
 		empty_req_queue(&dev->ep[tmp]);
 
@@ -1984,23 +1961,18 @@ __acquires(dev->lock)
 }
 
 /* Called by gadget driver to unregister itself */
-static int amd5536_stop(struct usb_gadget_driver *driver)
+static int amd5536_udc_stop(struct usb_gadget *g,
+		struct usb_gadget_driver *driver)
 {
-	struct udc	*dev = udc;
-	unsigned long	flags;
+	struct udc *dev = to_amd5536_udc(g);
+	unsigned long flags;
 	u32 tmp;
 
-	if (!dev)
-		return -ENODEV;
-	if (!driver || driver != dev->driver || !driver->unbind)
-		return -EINVAL;
-
 	spin_lock_irqsave(&dev->lock, flags);
 	udc_mask_unused_interrupts(dev);
 	shutdown(dev, driver);
 	spin_unlock_irqrestore(&dev->lock, flags);
 
-	driver->unbind(&dev->gadget);
 	dev->gadget.dev.driver = NULL;
 	dev->driver = NULL;
 
@@ -2009,9 +1981,6 @@ static int amd5536_stop(struct usb_gadget_driver *driver)
 	tmp |= AMD_BIT(UDC_DEVCTL_SD);
 	writel(tmp, &dev->regs->ctl);
 
-
-	DBG(dev, "%s: unregistered\n", driver->driver.name);
-
 	return 0;
 }
 
diff --git a/drivers/usb/gadget/amd5536udc.h b/drivers/usb/gadget/amd5536udc.h
index 14af87d65ca..f1bf32e6b8d 100644
--- a/drivers/usb/gadget/amd5536udc.h
+++ b/drivers/usb/gadget/amd5536udc.h
@@ -563,6 +563,8 @@ struct udc {
 	u16				cur_alt;
 };
 
+#define to_amd5536_udc(g)	(container_of((g), struct udc, gadget))
+
 /* setup request data */
 union udc_setup_data {
 	u32			data[2];
diff --git a/drivers/usb/gadget/at91_udc.c b/drivers/usb/gadget/at91_udc.c
index 0143ffa4e40..45dd2929a67 100644
--- a/drivers/usb/gadget/at91_udc.c
+++ b/drivers/usb/gadget/at91_udc.c
@@ -1621,8 +1621,7 @@ static void at91_vbus_timer(unsigned long data)
 	 * bus such as i2c or spi which may sleep, so schedule some work
 	 * to read the vbus gpio
 	 */
-	if (!work_pending(&udc->vbus_timer_work))
-		schedule_work(&udc->vbus_timer_work);
+	schedule_work(&udc->vbus_timer_work);
 }
 
 static int at91_start(struct usb_gadget *gadget,
@@ -1739,7 +1738,7 @@ static int at91udc_probe(struct platform_device *pdev)
 
 	/* rm9200 needs manual D+ pullup; off by default */
 	if (cpu_is_at91rm9200()) {
-		if (gpio_is_valid(udc->board.pullup_pin)) {
+		if (!gpio_is_valid(udc->board.pullup_pin)) {
 			DBG("no D+ pullup?\n");
 			retval = -ENODEV;
 			goto fail0;
diff --git a/drivers/usb/gadget/cdc2.c b/drivers/usb/gadget/cdc2.c
index 1e4bb77f00b..a7d6f702675 100644
--- a/drivers/usb/gadget/cdc2.c
+++ b/drivers/usb/gadget/cdc2.c
@@ -42,9 +42,6 @@ USB_GADGET_COMPOSITE_OPTIONS();
  * the runtime footprint, and giving us at least some parts of what
  * a "gcc --combine ... part1.c part2.c part3.c ... " build would.
  */
-
-#include "u_serial.c"
-#include "f_acm.c"
 #include "f_ecm.c"
 #include "u_ether.c"
 
@@ -108,12 +105,16 @@ static struct usb_gadget_strings *dev_strings[] = {
 static u8 hostaddr[ETH_ALEN];
 
 /*-------------------------------------------------------------------------*/
+static struct usb_function *f_acm;
+static struct usb_function_instance *fi_serial;
 
+static unsigned char tty_line;
 /*
  * We _always_ have both CDC ECM and CDC ACM functions.
  */
 static int __init cdc_do_config(struct usb_configuration *c)
 {
+	struct f_serial_opts *opts;
 	int	status;
 
 	if (gadget_is_otg(c->cdev->gadget)) {
@@ -125,11 +126,26 @@ static int __init cdc_do_config(struct usb_configuration *c)
 	if (status < 0)
 		return status;
 
-	status = acm_bind_config(c, 0);
-	if (status < 0)
-		return status;
+	fi_serial = usb_get_function_instance("acm");
+	if (IS_ERR(fi_serial))
+		return PTR_ERR(fi_serial);
 
+	opts = container_of(fi_serial, struct f_serial_opts, func_inst);
+	opts->port_num = tty_line;
+
+	f_acm = usb_get_function(fi_serial);
+	if (IS_ERR(f_acm))
+		goto err_func_acm;
+
+	status = usb_add_function(c, f_acm);
+	if (status)
+		goto err_conf;
 	return 0;
+err_conf:
+	usb_put_function(f_acm);
+err_func_acm:
+	usb_put_function_instance(fi_serial);
+	return status;
 }
 
 static struct usb_configuration cdc_config_driver = {
@@ -158,7 +174,7 @@ static int __init cdc_bind(struct usb_composite_dev *cdev)
 		return status;
 
 	/* set up serial link layer */
-	status = gserial_setup(cdev->gadget, 1);
+	status = gserial_alloc_line(&tty_line);
 	if (status < 0)
 		goto fail0;
 
@@ -184,7 +200,7 @@ static int __init cdc_bind(struct usb_composite_dev *cdev)
 	return 0;
 
 fail1:
-	gserial_cleanup();
+	gserial_free_line(tty_line);
 fail0:
 	gether_cleanup();
 	return status;
@@ -192,7 +208,9 @@ fail0:
 
 static int __exit cdc_unbind(struct usb_composite_dev *cdev)
 {
-	gserial_cleanup();
+	usb_put_function(f_acm);
+	usb_put_function_instance(fi_serial);
+	gserial_free_line(tty_line);
 	gether_cleanup();
 	return 0;
 }
diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index 2a6bfe759c2..7c821de8ce3 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -28,6 +28,12 @@
  * with the relevant device-wide data.
  */
 
+static struct usb_gadget_strings **get_containers_gs(
+		struct usb_gadget_string_container *uc)
+{
+	return (struct usb_gadget_strings **)uc->stash;
+}
+
 /**
  * next_ep_desc() - advance to the next EP descriptor
  * @t: currect pointer within descriptor array
@@ -215,6 +221,18 @@ done:
 }
 EXPORT_SYMBOL_GPL(usb_add_function);
 
+void usb_remove_function(struct usb_configuration *c, struct usb_function *f)
+{
+	if (f->disable)
+		f->disable(f);
+
+	bitmap_zero(f->endpoints, 32);
+	list_del(&f->list);
+	if (f->unbind)
+		f->unbind(c, f);
+}
+EXPORT_SYMBOL_GPL(usb_remove_function);
+
 /**
  * usb_function_deactivate - prevent function and gadget enumeration
  * @function: the function that isn't yet ready to respond
@@ -320,6 +338,25 @@ int usb_interface_id(struct usb_configuration *config,
 }
 EXPORT_SYMBOL_GPL(usb_interface_id);
 
+static u8 encode_bMaxPower(enum usb_device_speed speed,
+		struct usb_configuration *c)
+{
+	unsigned val;
+
+	if (c->MaxPower)
+		val = c->MaxPower;
+	else
+		val = CONFIG_USB_GADGET_VBUS_DRAW;
+	if (!val)
+		return 0;
+	switch (speed) {
+	case USB_SPEED_SUPER:
+		return DIV_ROUND_UP(val, 8);
+	default:
+		return DIV_ROUND_UP(val, 2);
+	};
+}
+
 static int config_buf(struct usb_configuration *config,
 		enum usb_device_speed speed, void *buf, u8 type)
 {
@@ -339,7 +376,7 @@ static int config_buf(struct usb_configuration *config,
 	c->bConfigurationValue = config->bConfigurationValue;
 	c->iConfiguration = config->iConfiguration;
 	c->bmAttributes = USB_CONFIG_ATT_ONE | config->bmAttributes;
-	c->bMaxPower = config->bMaxPower ? : (CONFIG_USB_GADGET_VBUS_DRAW / 2);
+	c->bMaxPower = encode_bMaxPower(speed, config);
 
 	/* There may be e.g. OTG descriptors */
 	if (config->descriptors) {
@@ -656,7 +693,7 @@ static int set_config(struct usb_composite_dev *cdev,
 	}
 
 	/* when we return, be sure our power usage is valid */
-	power = c->bMaxPower ? (2 * c->bMaxPower) : CONFIG_USB_GADGET_VBUS_DRAW;
+	power = c->MaxPower ? c->MaxPower : CONFIG_USB_GADGET_VBUS_DRAW;
 done:
 	usb_gadget_vbus_draw(gadget, power);
 	if (result >= 0 && cdev->delayed_status)
@@ -664,6 +701,31 @@ done:
 	return result;
 }
 
+int usb_add_config_only(struct usb_composite_dev *cdev,
+		struct usb_configuration *config)
+{
+	struct usb_configuration *c;
+
+	if (!config->bConfigurationValue)
+		return -EINVAL;
+
+	/* Prevent duplicate configuration identifiers */
+	list_for_each_entry(c, &cdev->configs, list) {
+		if (c->bConfigurationValue == config->bConfigurationValue)
+			return -EBUSY;
+	}
+
+	config->cdev = cdev;
+	list_add_tail(&config->list, &cdev->configs);
+
+	INIT_LIST_HEAD(&config->functions);
+	config->next_interface_id = 0;
+	memset(config->interface, 0, sizeof(config->interface));
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(usb_add_config_only);
+
 /**
  * usb_add_config() - add a configuration to a device.
  * @cdev: wraps the USB gadget
@@ -684,30 +746,18 @@ int usb_add_config(struct usb_composite_dev *cdev,
 		int (*bind)(struct usb_configuration *))
 {
 	int				status = -EINVAL;
-	struct usb_configuration	*c;
+
+	if (!bind)
+		goto done;
 
 	DBG(cdev, "adding config #%u '%s'/%p\n",
 			config->bConfigurationValue,
 			config->label, config);
 
-	if (!config->bConfigurationValue || !bind)
+	status = usb_add_config_only(cdev, config);
+	if (status)
 		goto done;
 
-	/* Prevent duplicate configuration identifiers */
-	list_for_each_entry(c, &cdev->configs, list) {
-		if (c->bConfigurationValue == config->bConfigurationValue) {
-			status = -EBUSY;
-			goto done;
-		}
-	}
-
-	config->cdev = cdev;
-	list_add_tail(&config->list, &cdev->configs);
-
-	INIT_LIST_HEAD(&config->functions);
-	config->next_interface_id = 0;
-	memset(config->interface, 0, sizeof(config->interface));
-
 	status = bind(config);
 	if (status < 0) {
 		while (!list_empty(&config->functions)) {
@@ -860,6 +910,7 @@ static int get_string(struct usb_composite_dev *cdev,
 		void *buf, u16 language, int id)
 {
 	struct usb_composite_driver	*composite = cdev->driver;
+	struct usb_gadget_string_container *uc;
 	struct usb_configuration	*c;
 	struct usb_function		*f;
 	int				len;
@@ -892,6 +943,12 @@ static int get_string(struct usb_composite_dev *cdev,
 					collect_langs(sp, s->wData);
 			}
 		}
+		list_for_each_entry(uc, &cdev->gstrings, list) {
+			struct usb_gadget_strings **sp;
+
+			sp = get_containers_gs(uc);
+			collect_langs(sp, s->wData);
+		}
 
 		for (len = 0; len <= 126 && s->wData[len]; len++)
 			continue;
@@ -902,6 +959,15 @@ static int get_string(struct usb_composite_dev *cdev,
 		return s->bLength;
 	}
 
+	list_for_each_entry(uc, &cdev->gstrings, list) {
+		struct usb_gadget_strings **sp;
+
+		sp = get_co