[PATCH RFC] usb gadget: introduce usb_gadget_probe_driver

[PATCH RFC] usb gadget: introduce usb_gadget_probe_driver

[Uwe Kleine-König]

This is like usb_gadget_register_driver with the only difference that it
gets the bind function as parameter instead of using driver->bind.  This
allows fixing section mismatches like

	WARNING: drivers/usb/gadget/g_printer.o(.data+0xc): Section mismatch in
	reference from the variable printer_driver to the function
	.init.text:printer_bind()
	The variable printer_driver references
	the function __init printer_bind()

by using usb_gadget_probe_driver with driver->bind = NULL.  When all
drivers are fixed to use the new function the bind member of struct
usb_gadget_driver can go away.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Cc: Michal Nazarewicz <m.nazarewicz@samsung.com>
Cc: Greg Kroah-Hartman <gregkh@suse.de>
---
Hello,

there is an alternative patch in Greg's tree [1], but IMHO mine is
better as it doesn't need __ref.

Thoughts?

Uwe

[1] http://www.kernel.org/pub/linux/kernel/people/gregkh/gregkh-2.6/patches/usb/usb-gadget-section-mismatch-warning-fixed.patch
 drivers/usb/gadget/amd5536udc.c     |    9 +++++----
 drivers/usb/gadget/at91_udc.c       |    9 +++++----
 drivers/usb/gadget/atmel_usba_udc.c |    7 ++++---
 drivers/usb/gadget/ci13xxx_udc.c    |   16 ++++++++--------
 drivers/usb/gadget/dummy_hcd.c      |    8 ++++----
 drivers/usb/gadget/fsl_qe_udc.c     |   12 ++++++------
 drivers/usb/gadget/fsl_udc_core.c   |   10 +++++-----
 drivers/usb/gadget/goku_udc.c       |    9 +++++----
 drivers/usb/gadget/imx_udc.c        |    9 +++++----
 drivers/usb/gadget/langwell_udc.c   |    9 +++++----
 drivers/usb/gadget/lh7a40x_udc.c    |    9 +++++----
 drivers/usb/gadget/m66592-udc.c     |    9 +++++----
 drivers/usb/gadget/net2280.c        |    8 ++++----
 drivers/usb/gadget/omap_udc.c       |   10 +++++-----
 drivers/usb/gadget/pxa25x_udc.c     |    9 +++++----
 drivers/usb/gadget/pxa27x_udc.c     |   12 +++++++-----
 drivers/usb/gadget/r8a66597-udc.c   |    9 +++++----
 drivers/usb/gadget/s3c-hsotg.c      |    9 +++++----
 drivers/usb/gadget/s3c2410_udc.c    |   14 +++++++-------
 drivers/usb/musb/musb_gadget.c      |    8 ++++----
 include/linux/usb/gadget.h          |   27 ++++++++++++++++++++++++---
 21 files changed, 128 insertions(+), 94 deletions(-)

diff --git a/drivers/usb/gadget/amd5536udc.c b/drivers/usb/gadget/amd5536udc.c
index 731150d..c266c1e 100644
--- a/drivers/usb/gadget/amd5536udc.c
+++ b/drivers/usb/gadget/amd5536udc.c
@@ -1954,13 +1954,14 @@ static int setup_ep0(struct udc *dev)
 }
 
 /* Called by gadget driver to register itself */
-int usb_gadget_register_driver(struct usb_gadget_driver *driver)
+int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
+		int (*bind)(struct usb_gadget *))
 {
 	struct udc		*dev = udc;
 	int			retval;
 	u32 tmp;
 
-	if (!driver || !driver->bind || !driver->setup
+	if (!driver || bind || !driver->setup
 			|| driver->speed != USB_SPEED_HIGH)
 		return -EINVAL;
 	if (!dev)
@@ -1972,7 +1973,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 	dev->driver = driver;
 	dev->gadget.dev.driver = &driver->driver;
 
-	retval = driver->bind(&dev->gadget);
+	retval = bind(&dev->gadget);
 
 	/* Some gadget drivers use both ep0 directions.
 	 * NOTE: to gadget driver, ep0 is just one endpoint...
@@ -2000,7 +2001,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 
 	return 0;
 }
-EXPORT_SYMBOL(usb_gadget_register_driver);
+EXPORT_SYMBOL(usb_gadget_probe_driver);
 
 /* shutdown requests and disconnect from gadget */
 static void
diff --git a/drivers/usb/gadget/at91_udc.c b/drivers/usb/gadget/at91_udc.c
index eaa79c8..fc7bbb7 100644
--- a/drivers/usb/gadget/at91_udc.c
+++ b/drivers/usb/gadget/at91_udc.c
@@ -1570,14 +1570,15 @@ static irqreturn_t at91_vbus_irq(int irq, void *_udc)
 	return IRQ_HANDLED;
 }
 
-int usb_gadget_register_driver (struct usb_gadget_driver *driver)
+int usb_gadget_probe_driver (struct usb_gadget_driver *driver,
+		int (*bind)(struct usb_gadget *))
 {
 	struct at91_udc	*udc = &controller;
 	int		retval;
 
 	if (!driver
 			|| driver->speed < USB_SPEED_FULL
-			|| !driver->bind
+			|| !bind
 			|| !driver->setup) {
 		DBG("bad parameter.\n");
 		return -EINVAL;
@@ -1594,9 +1595,9 @@ int usb_gadget_register_driver (struct usb_gadget_driver *driver)
 	udc->enabled = 1;
 	udc->selfpowered = 1;
 
-	retval = driver->bind(&udc->gadget);
+	retval = bind(&udc->gadget);
 	if (retval) {
-		DBG("driver->bind() returned %d\n", retval);
+		DBG("bind() returned %d\n", retval);
 		udc->driver = NULL;
 		udc->gadget.dev.driver = NULL;
 		dev_set_drvdata(&udc->gadget.dev, NULL);
diff --git a/drivers/usb/gadget/atmel_usba_udc.c b/drivers/usb/gadget/atmel_usba_udc.c
index d623c7b..e4810c6 100644
--- a/drivers/usb/gadget/atmel_usba_udc.c
+++ b/drivers/usb/gadget/atmel_usba_udc.c
@@ -1789,7 +1789,8 @@ out:
 	return IRQ_HANDLED;
 }
 
-int usb_gadget_register_driver(struct usb_gadget_driver *driver)
+int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
+		int (*bind)(struct usb_gadget *))
 {
 	struct usba_udc *udc = &the_udc;
 	unsigned long flags;
@@ -1812,7 +1813,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 	clk_enable(udc->pclk);
 	clk_enable(udc->hclk);
 
-	ret = driver->bind(&udc->gadget);
+	ret = bind(&udc->gadget);
 	if (ret) {
 		DBG(DBG_ERR, "Could not bind to driver %s: error %d\n",
 			driver->driver.name, ret);
@@ -1841,7 +1842,7 @@ err_driver_bind:
 	udc->gadget.dev.driver = NULL;
 	return ret;
 }
-EXPORT_SYMBOL(usb_gadget_register_driver);
+EXPORT_SYMBOL(usb_gadget_probe_driver);
 
 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
 {
diff --git a/drivers/usb/gadget/ci13xxx_udc.c b/drivers/usb/gadget/ci13xxx_udc.c
index 6996951..83fc0d4 100644
--- a/drivers/usb/gadget/ci13xxx_udc.c
+++ b/drivers/usb/gadget/ci13xxx_udc.c
@@ -2340,12 +2340,13 @@ static const struct usb_ep_ops usb_ep_ops = {
 static const struct usb_gadget_ops usb_gadget_ops;
 
 /**
- * usb_gadget_register_driver: register a gadget driver
+ * usb_gadget_probe_driver: register a gadget driver
  *
- * Check usb_gadget_register_driver() at "usb_gadget.h" for details
- * Interrupts are enabled here
+ * Check usb_gadget_probe_driver() at "usb_gadget.h" for details.
+ * Interrupts are enabled here.
  */
-int usb_gadget_register_driver(struct usb_gadget_driver *driver)
+int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
+		int (*bind)(struct usb_gadget *))
 {
 	struct ci13xxx *udc = _udc;
 	unsigned long i, k, flags;
@@ -2354,7 +2355,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 	trace("%p", driver);
 
 	if (driver             == NULL ||
-	    driver->bind       == NULL ||
+	    bind               == NULL ||
 	    driver->unbind     == NULL ||
 	    driver->setup      == NULL ||
 	    driver->disconnect == NULL ||
@@ -2430,7 +2431,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 	udc->gadget.dev.driver = &driver->driver;
 
 	spin_unlock_irqrestore(udc->lock, flags);
-	retval = driver->bind(&udc->gadget);                /* MAY SLEEP */
+	retval = bind(&udc->gadget);                /* MAY SLEEP */
 	spin_lock_irqsave(udc->lock, flags);
 
 	if (retval) {
@@ -2447,7 +2448,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 		usb_gadget_unregister_driver(driver);
 	return retval;
 }
-EXPORT_SYMBOL(usb_gadget_register_driver);
+EXPORT_SYMBOL(usb_gadget_probe_driver);
 
 /**
  * usb_gadget_unregister_driver: unregister a gadget driver
@@ -2462,7 +2463,6 @@ int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
 	trace("%p", driver);
 
 	if (driver             == NULL ||
-	    driver->bind       == NULL ||
 	    driver->unbind     == NULL ||
 	    driver->setup      == NULL ||
 	    driver->disconnect == NULL ||
diff --git a/drivers/usb/gadget/dummy_hcd.c b/drivers/usb/gadget/dummy_hcd.c
index 4f9e578..e81c939 100644
--- a/drivers/usb/gadget/dummy_hcd.c
+++ b/drivers/usb/gadget/dummy_hcd.c
@@ -748,7 +748,8 @@ static DEVICE_ATTR (function, S_IRUGO, show_function, NULL);
  */
 
 int
-usb_gadget_register_driver (struct usb_gadget_driver *driver)
+usb_gadget_probe_driver (struct usb_gadget_driver *driver,
+		int (*bind)(struct usb_gadget *))
 {
 	struct dummy	*dum = the_controller;
 	int		retval, i;
@@ -757,8 +758,7 @@ usb_gadget_register_driver (struct usb_gadget_driver *driver)
 		return -EINVAL;
 	if (dum->driver)
 		return -EBUSY;
-	if (!driver->bind || !driver->setup
-			|| driver->speed == USB_SPEED_UNKNOWN)
+	if (!bind || !driver->setup || driver->speed == USB_SPEED_UNKNOWN)
 		return -EINVAL;
 
 	/*
@@ -796,7 +796,7 @@ usb_gadget_register_driver (struct usb_gadget_driver *driver)
 	dum->gadget.dev.driver = &driver->driver;
 	dev_dbg (udc_dev(dum), "binding gadget driver '%s'\n",
 			driver->driver.name);
-	retval = driver->bind(&dum->gadget);
+	retval = bind(&dum->gadget);
 	if (retval) {
 		dum->driver = NULL;
 		dum->gadget.dev.driver = NULL;
diff --git a/drivers/usb/gadget/fsl_qe_udc.c b/drivers/usb/gadget/fsl_qe_udc.c
index 82506ca..9b4f4b5 100644
--- a/drivers/usb/gadget/fsl_qe_udc.c
+++ b/drivers/usb/gadget/fsl_qe_udc.c
@@ -2301,9 +2301,10 @@ static irqreturn_t qe_udc_irq(int irq, void *_udc)
 }
 
 /*-------------------------------------------------------------------------
-	Gadget driver register and unregister.
+	Gadget driver probe and unregister.
  --------------------------------------------------------------------------*/
-int usb_gadget_register_driver(struct usb_gadget_driver *driver)
+int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
+		int (*bind)(struct usb_gadget *))
 {
 	int retval;
 	unsigned long flags = 0;
@@ -2314,8 +2315,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 
 	if (!driver || (driver->speed != USB_SPEED_FULL
 			&& driver->speed != USB_SPEED_HIGH)
-			|| !driver->bind || !driver->disconnect
-			|| !driver->setup)
+			|| !bind || !driver->disconnect || !driver->setup)
 		return -EINVAL;
 
 	if (udc_controller->driver)
@@ -2331,7 +2331,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 	udc_controller->gadget.speed = (enum usb_device_speed)(driver->speed);
 	spin_unlock_irqrestore(&udc_controller->lock, flags);
 
-	retval = driver->bind(&udc_controller->gadget);
+	retval = bind(&udc_controller->gadget);
 	if (retval) {
 		dev_err(udc_controller->dev, "bind to %s --> %d",
 				driver->driver.name, retval);
@@ -2352,7 +2352,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 		udc_controller->gadget.name, driver->driver.name);
 	return 0;
 }
-EXPORT_SYMBOL(usb_gadget_register_driver);
+EXPORT_SYMBOL(usb_gadget_probe_driver);
 
 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
 {
diff --git a/drivers/usb/gadget/fsl_udc_core.c b/drivers/usb/gadget/fsl_udc_core.c
index 08a9a62..c16b402 100644
--- a/drivers/usb/gadget/fsl_udc_core.c
+++ b/drivers/usb/gadget/fsl_udc_core.c
@@ -1765,7 +1765,8 @@ static irqreturn_t fsl_udc_irq(int irq, void *_udc)
  * Hook to gadget drivers
  * Called by initialization code of gadget drivers
 *----------------------------------------------------------------*/
-int usb_gadget_register_driver(struct usb_gadget_driver *driver)
+int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
+		int (*bind)(struct usb_gadget *))
 {
 	int retval = -ENODEV;
 	unsigned long flags = 0;
@@ -1775,8 +1776,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 
 	if (!driver || (driver->speed != USB_SPEED_FULL
 				&& driver->speed != USB_SPEED_HIGH)
-			|| !driver->bind || !driver->disconnect
-			|| !driver->setup)
+			|| !bind || !driver->disconnect || !driver->setup)
 		return -EINVAL;
 
 	if (udc_controller->driver)
@@ -1792,7 +1792,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 	spin_unlock_irqrestore(&udc_controller->lock, flags);
 
 	/* bind udc driver to gadget driver */
-	retval = driver->bind(&udc_controller->gadget);
+	retval = bind(&udc_controller->gadget);
 	if (retval) {
 		VDBG("bind to %s --> %d", driver->driver.name, retval);
 		udc_controller->gadget.dev.driver = NULL;
@@ -1814,7 +1814,7 @@ out:
 		       retval);
 	return retval;
 }
-EXPORT_SYMBOL(usb_gadget_register_driver);
+EXPORT_SYMBOL(usb_gadget_probe_driver);
 
 /* Disconnect from gadget driver */
 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
diff --git a/drivers/usb/gadget/goku_udc.c b/drivers/usb/gadget/goku_udc.c
index 1088d08..49fbd4d 100644
--- a/drivers/usb/gadget/goku_udc.c
+++ b/drivers/usb/gadget/goku_udc.c
@@ -1343,14 +1343,15 @@ static struct goku_udc	*the_controller;
  * disconnect is reported.  then a host may connect again, or
  * the driver might get unbound.
  */
-int usb_gadget_register_driver(struct usb_gadget_driver *driver)
+int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
+		int (*bind)(struct usb_gadget *))
 {
 	struct goku_udc	*dev = the_controller;
 	int			retval;
 
 	if (!driver
 			|| driver->speed < USB_SPEED_FULL
-			|| !driver->bind
+			|| !bind
 			|| !driver->disconnect
 			|| !driver->setup)
 		return -EINVAL;
@@ -1363,7 +1364,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 	driver->driver.bus = NULL;
 	dev->driver = driver;
 	dev->gadget.dev.driver = &driver->driver;
-	retval = driver->bind(&dev->gadget);
+	retval = bind(&dev->gadget);
 	if (retval) {
 		DBG(dev, "bind to driver %s --> error %d\n",
 				driver->driver.name, retval);
@@ -1380,7 +1381,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 	DBG(dev, "registered gadget driver '%s'\n", driver->driver.name);
 	return 0;
 }
-EXPORT_SYMBOL(usb_gadget_register_driver);
+EXPORT_SYMBOL(usb_gadget_probe_driver);
 
 static void
 stop_activity(struct goku_udc *dev, struct usb_gadget_driver *driver)
diff --git a/drivers/usb/gadget/imx_udc.c b/drivers/usb/gadget/imx_udc.c
index e743122..ed02664 100644
--- a/drivers/usb/gadget/imx_udc.c
+++ b/drivers/usb/gadget/imx_udc.c
@@ -1319,14 +1319,15 @@ static struct imx_udc_struct controller = {
  * USB gadged driver functions
  *******************************************************************************
  */
-int usb_gadget_register_driver(struct usb_gadget_driver *driver)
+int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
+		int (*bind)(struct usb_gadget *))
 {
 	struct imx_udc_struct *imx_usb = &controller;
 	int retval;
 
 	if (!driver
 		|| driver->speed < USB_SPEED_FULL
-		|| !driver->bind
+		|| !bind
 		|| !driver->disconnect
 		|| !driver->setup)
 			return -EINVAL;
@@ -1342,7 +1343,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 	retval = device_add(&imx_usb->gadget.dev);
 	if (retval)
 		goto fail;
-	retval = driver->bind(&imx_usb->gadget);
+	retval = bind(&imx_usb->gadget);
 	if (retval) {
 		D_ERR(imx_usb->dev, "<%s> bind to driver %s --> error %d\n",
 			__func__, driver->driver.name, retval);
@@ -1362,7 +1363,7 @@ fail:
 	imx_usb->gadget.dev.driver = NULL;
 	return retval;
 }
-EXPORT_SYMBOL(usb_gadget_register_driver);
+EXPORT_SYMBOL(usb_gadget_probe_driver);
 
 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
 {
diff --git a/drivers/usb/gadget/langwell_udc.c b/drivers/usb/gadget/langwell_udc.c
index a391351..e7222de 100644
--- a/drivers/usb/gadget/langwell_udc.c
+++ b/drivers/usb/gadget/langwell_udc.c
@@ -1807,7 +1807,8 @@ static DEVICE_ATTR(langwell_udc, S_IRUGO, show_langwell_udc, NULL);
  * the driver might get unbound.
  */
 
-int usb_gadget_register_driver(struct usb_gadget_driver *driver)
+int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
+		int (*bind)(struct usb_gadget *))
 {
 	struct langwell_udc	*dev = the_controller;
 	unsigned long		flags;
@@ -1830,7 +1831,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 
 	spin_unlock_irqrestore(&dev->lock, flags);
 
-	retval = driver->bind(&dev->gadget);
+	retval = bind(&dev->gadget);
 	if (retval) {
 		DBG(dev, "bind to driver %s --> %d\n",
 				driver->driver.name, retval);
@@ -1868,7 +1869,7 @@ err_unbind:
 	DBG(dev, "<--- %s()\n", __func__);
 	return retval;
 }
-EXPORT_SYMBOL(usb_gadget_register_driver);
+EXPORT_SYMBOL(usb_gadget_probe_driver);
 
 
 /* unregister gadget driver */
@@ -1882,7 +1883,7 @@ int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
 
 	DBG(dev, "---> %s()\n", __func__);
 
-	if (unlikely(!driver || !driver->bind || !driver->unbind))
+	if (unlikely(!driver || !driver->unbind))
 		return -EINVAL;
 
 	/* unbind OTG transceiver */
diff --git a/drivers/usb/gadget/lh7a40x_udc.c b/drivers/usb/gadget/lh7a40x_udc.c
index fded3fc..470c45c 100644
--- a/drivers/usb/gadget/lh7a40x_udc.c
+++ b/drivers/usb/gadget/lh7a40x_udc.c
@@ -408,7 +408,8 @@ static void udc_enable(struct lh7a40x_udc *dev)
 /*
   Register entry point for the peripheral controller driver.
 */
-int usb_gadget_register_driver(struct usb_gadget_driver *driver)
+int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
+		int (*bind)(struct usb_gadget *))
 {
 	struct lh7a40x_udc *dev = the_controller;
 	int retval;
@@ -417,7 +418,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 
 	if (!driver
 			|| driver->speed != USB_SPEED_FULL
-			|| !driver->bind
+			|| !bind
 			|| !driver->disconnect
 			|| !driver->setup)
 		return -EINVAL;
@@ -431,7 +432,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 	dev->gadget.dev.driver = &driver->driver;
 
 	device_add(&dev->gadget.dev);
-	retval = driver->bind(&dev->gadget);
+	retval = bind(&dev->gadget);
 	if (retval) {
 		printk(KERN_WARNING "%s: bind to driver %s --> error %d\n",
 		       dev->gadget.name, driver->driver.name, retval);
@@ -454,7 +455,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 	return 0;
 }
 
-EXPORT_SYMBOL(usb_gadget_register_driver);
+EXPORT_SYMBOL(usb_gadget_probe_driver);
 
 /*
   Unregister entry point for the peripheral controller driver.
diff --git a/drivers/usb/gadget/m66592-udc.c b/drivers/usb/gadget/m66592-udc.c
index 166bf71..2ce1f49 100644
--- a/drivers/usb/gadget/m66592-udc.c
+++ b/drivers/usb/gadget/m66592-udc.c
@@ -1454,14 +1454,15 @@ static struct usb_ep_ops m66592_ep_ops = {
 /*-------------------------------------------------------------------------*/
 static struct m66592 *the_controller;
 
-int usb_gadget_register_driver(struct usb_gadget_driver *driver)
+int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
+		int (*bind)(struct usb_gadget *))
 {
 	struct m66592 *m66592 = the_controller;
 	int retval;
 
 	if (!driver
 			|| driver->speed != USB_SPEED_HIGH
-			|| !driver->bind
+			|| !bind
 			|| !driver->setup)
 		return -EINVAL;
 	if (!m66592)
@@ -1480,7 +1481,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 		goto error;
 	}
 
-	retval = driver->bind (&m66592->gadget);
+	retval = bind(&m66592->gadget);
 	if (retval) {
 		pr_err("bind to driver error (%d)\n", retval);
 		device_del(&m66592->gadget.dev);
@@ -1505,7 +1506,7 @@ error:
 
 	return retval;
 }
-EXPORT_SYMBOL(usb_gadget_register_driver);
+EXPORT_SYMBOL(usb_gadget_probe_driver);
 
 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
 {
diff --git a/drivers/usb/gadget/net2280.c b/drivers/usb/gadget/net2280.c
index 9498be8..a469b27 100644
--- a/drivers/usb/gadget/net2280.c
+++ b/drivers/usb/gadget/net2280.c
@@ -1929,7 +1929,8 @@ static void ep0_start (struct net2280 *dev)
  * disconnect is reported.  then a host may connect again, or
  * the driver might get unbound.
  */
-int usb_gadget_register_driver (struct usb_gadget_driver *driver)
+int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
+		int (*bind)(struct usb_gadget *))
 {
 	struct net2280		*dev = the_controller;
 	int			retval;
@@ -1941,8 +1942,7 @@ int usb_gadget_register_driver (struct usb_gadget_driver *driver)
 	 */
 	if (!driver
 			|| driver->speed != USB_SPEED_HIGH
-			|| !driver->bind
-			|| !driver->setup)
+			|| !bind || !driver->setup)
 		return -EINVAL;
 	if (!dev)
 		return -ENODEV;
@@ -1957,7 +1957,7 @@ int usb_gadget_register_driver (struct usb_gadget_driver *driver)
 	driver->driver.bus = NULL;
 	dev->driver = driver;
 	dev->gadget.dev.driver = &driver->driver;
-	retval = driver->bind (&dev->gadget);
+	retval = bind(&dev->gadget);
 	if (retval) {
 		DEBUG (dev, "bind to driver %s --> %d\n",
 				driver->driver.name, retval);
diff --git a/drivers/usb/gadget/omap_udc.c b/drivers/usb/gadget/omap_udc.c
index f81e4f0..61d3ca6 100644
--- a/drivers/usb/gadget/omap_udc.c
+++ b/drivers/usb/gadget/omap_udc.c
@@ -2102,7 +2102,8 @@ static inline int machine_without_vbus_sense(void)
 		);
 }
 
-int usb_gadget_register_driver (struct usb_gadget_driver *driver)
+int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
+		int (*bind)(struct usb_gadget *))
 {
 	int		status = -ENODEV;
 	struct omap_ep	*ep;
@@ -2114,8 +2115,7 @@ int usb_gadget_register_driver (struct usb_gadget_driver *driver)
 	if (!driver
 			// FIXME if otg, check:  driver->is_otg
 			|| driver->speed < USB_SPEED_FULL
-			|| !driver->bind
-			|| !driver->setup)
+			|| !bind || !driver->setup)
 		return -EINVAL;
 
 	spin_lock_irqsave(&udc->lock, flags);
@@ -2145,7 +2145,7 @@ int usb_gadget_register_driver (struct usb_gadget_driver *driver)
 	if (udc->dc_clk != NULL)
 		omap_udc_enable_clock(1);
 
-	status = driver->bind (&udc->gadget);
+	status = bind(&udc->gadget);
 	if (status) {
 		DBG("bind to %s --> %d\n", driver->driver.name, status);
 		udc->gadget.dev.driver = NULL;
@@ -2186,7 +2186,7 @@ done:
 		omap_udc_enable_clock(0);
 	return status;
 }
-EXPORT_SYMBOL(usb_gadget_register_driver);
+EXPORT_SYMBOL(usb_gadget_probe_driver);
 
 int usb_gadget_unregister_driver (struct usb_gadget_driver *driver)
 {
diff --git a/drivers/usb/gadget/pxa25x_udc.c b/drivers/usb/gadget/pxa25x_udc.c
index be5fb34..b37f92c 100644
--- a/drivers/usb/gadget/pxa25x_udc.c
+++ b/drivers/usb/gadget/pxa25x_udc.c
@@ -1280,14 +1280,15 @@ static void udc_enable (struct pxa25x_udc *dev)
  * disconnect is reported.  then a host may connect again, or
  * the driver might get unbound.
  */
-int usb_gadget_register_driver(struct usb_gadget_driver *driver)
+int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
+		int (*bind)(struct usb_gadget *))
 {
 	struct pxa25x_udc	*dev = the_controller;
 	int			retval;
 
 	if (!driver
 			|| driver->speed < USB_SPEED_FULL
-			|| !driver->bind
+			|| !bind
 			|| !driver->disconnect
 			|| !driver->setup)
 		return -EINVAL;
@@ -1308,7 +1309,7 @@ fail:
 		dev->gadget.dev.driver = NULL;
 		return retval;
 	}
-	retval = driver->bind(&dev->gadget);
+	retval = bind(&dev->gadget);
 	if (retval) {
 		DMSG("bind to driver %s --> error %d\n",
 				driver->driver.name, retval);
@@ -1338,7 +1339,7 @@ fail:
 bind_fail:
 	return retval;
 }
-EXPORT_SYMBOL(usb_gadget_register_driver);
+EXPORT_SYMBOL(usb_gadget_probe_driver);
 
 static void
 stop_activity(struct pxa25x_udc *dev, struct usb_gadget_driver *driver)
diff --git a/drivers/usb/gadget/pxa27x_udc.c b/drivers/usb/gadget/pxa27x_udc.c
index 85b0d89..798d280 100644
--- a/drivers/usb/gadget/pxa27x_udc.c
+++ b/drivers/usb/gadget/pxa27x_udc.c
@@ -1792,8 +1792,9 @@ static void udc_enable(struct pxa_udc *udc)
 }
 
 /**
- * usb_gadget_register_driver - Register gadget driver
+ * usb_gadget_probe_driver - Register gadget driver
  * @driver: gadget driver
+ * @bind: bind function
  *
  * When a driver is successfully registered, it will receive control requests
  * including set_configuration(), which enables non-control requests.  Then
@@ -1805,12 +1806,13 @@ static void udc_enable(struct pxa_udc *udc)
  *
  * Returns 0 if no error, -EINVAL, -ENODEV, -EBUSY otherwise
  */
-int usb_gadget_register_driver(struct usb_gadget_driver *driver)
+int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
+		int (*bind)(struct usb_gadget *))
 {
 	struct pxa_udc *udc = the_controller;
 	int retval;
 
-	if (!driver || driver->speed < USB_SPEED_FULL || !driver->bind
+	if (!driver || driver->speed < USB_SPEED_FULL || !bind
 			|| !driver->disconnect || !driver->setup)
 		return -EINVAL;
 	if (!udc)
@@ -1828,7 +1830,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 		dev_err(udc->dev, "device_add error %d\n", retval);
 		goto add_fail;
 	}
-	retval = driver->bind(&udc->gadget);
+	retval = bind(&udc->gadget);
 	if (retval) {
 		dev_err(udc->dev, "bind to driver %s --> error %d\n",
 			driver->driver.name, retval);
@@ -1859,7 +1861,7 @@ add_fail:
 	udc->gadget.dev.driver = NULL;
 	return retval;
 }
-EXPORT_SYMBOL(usb_gadget_register_driver);
+EXPORT_SYMBOL(usb_gadget_probe_driver);
 
 
 /**
diff --git a/drivers/usb/gadget/r8a66597-udc.c b/drivers/usb/gadget/r8a66597-udc.c
index 70a8178..5545d41 100644
--- a/drivers/usb/gadget/r8a66597-udc.c
+++ b/drivers/usb/gadget/r8a66597-udc.c
@@ -1405,14 +1405,15 @@ static struct usb_ep_ops r8a66597_ep_ops = {
 /*-------------------------------------------------------------------------*/
 static struct r8a66597 *the_controller;
 
-int usb_gadget_register_driver(struct usb_gadget_driver *driver)
+int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
+		int (*bind)(struct usb_gadget *))
 {
 	struct r8a66597 *r8a66597 = the_controller;
 	int retval;
 
 	if (!driver
 			|| driver->speed != USB_SPEED_HIGH
-			|| !driver->bind
+			|| !bind
 			|| !driver->setup)
 		return -EINVAL;
 	if (!r8a66597)
@@ -1431,7 +1432,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 		goto error;
 	}
 
-	retval = driver->bind(&r8a66597->gadget);
+	retval = bind(&r8a66597->gadget);
 	if (retval) {
 		printk(KERN_ERR "bind to driver error (%d)\n", retval);
 		device_del(&r8a66597->gadget.dev);
@@ -1456,7 +1457,7 @@ error:
 
 	return retval;
 }
-EXPORT_SYMBOL(usb_gadget_register_driver);
+EXPORT_SYMBOL(usb_gadget_probe_driver);
 
 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
 {
diff --git a/drivers/usb/gadget/s3c-hsotg.c b/drivers/usb/gadget/s3c-hsotg.c
index 26193ec..89f04bc 100644
--- a/drivers/usb/gadget/s3c-hsotg.c
+++ b/drivers/usb/gadget/s3c-hsotg.c
@@ -2478,7 +2478,8 @@ static int s3c_hsotg_corereset(struct s3c_hsotg *hsotg)
 	return 0;
 }
 
-int usb_gadget_register_driver(struct usb_gadget_driver *driver)
+int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
+		int (*bind)(struct usb_gadget *))
 {
 	struct s3c_hsotg *hsotg = our_hsotg;
 	int ret;
@@ -2498,7 +2499,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 		dev_err(hsotg->dev, "%s: bad speed\n", __func__);
 	}
 
-	if (!driver->bind || !driver->setup) {
+	if (!bind || !driver->setup) {
 		dev_err(hsotg->dev, "%s: missing entry points\n", __func__);
 		return -EINVAL;
 	}
@@ -2517,7 +2518,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 		goto err;
 	}
 
-	ret = driver->bind(&hsotg->gadget);
+	ret = bind(&hsotg->gadget);
 	if (ret) {
 		dev_err(hsotg->dev, "failed bind %s\n", driver->driver.name);
 
@@ -2641,7 +2642,7 @@ err:
 	hsotg->gadget.dev.driver = NULL;
 	return ret;
 }
-EXPORT_SYMBOL(usb_gadget_register_driver);
+EXPORT_SYMBOL(usb_gadget_probe_driver);
 
 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
 {
diff --git a/drivers/usb/gadget/s3c2410_udc.c b/drivers/usb/gadget/s3c2410_udc.c
index e724a05..bcface6 100644
--- a/drivers/usb/gadget/s3c2410_udc.c
+++ b/drivers/usb/gadget/s3c2410_udc.c
@@ -1628,9 +1628,10 @@ static void s3c2410_udc_enable(struct s3c2410_udc *dev)
 }
 
 /*
- *	usb_gadget_register_driver
+ *	usb_gadget_probe_driver
  */
-int usb_gadget_register_driver(struct usb_gadget_driver *driver)
+int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
+		int (*bind)(struct usb_gadget *))
 {
 	struct s3c2410_udc *udc = the_controller;
 	int		retval;
@@ -1645,10 +1646,9 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 	if (udc->driver)
 		return -EBUSY;
 
-	if (!driver->bind || !driver->setup
-			|| driver->speed < USB_SPEED_FULL) {
+	if (!bind || !driver->setup || driver->speed < USB_SPEED_FULL) {
 		printk(KERN_ERR "Invalid driver: bind %p setup %p speed %d\n",
-			driver->bind, driver->setup, driver->speed);
+			bind, driver->setup, driver->speed);
 		return -EINVAL;
 	}
 #if defined(MODULE)
@@ -1671,7 +1671,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 	dprintk(DEBUG_NORMAL, "binding gadget driver '%s'\n",
 		driver->driver.name);
 
-	if ((retval = driver->bind (&udc->gadget)) != 0) {
+	if ((retval = bind(&udc->gadget)) != 0) {
 		device_del(&udc->gadget.dev);
 		goto register_error;
 	}
@@ -2045,7 +2045,7 @@ static void __exit udc_exit(void)
 }
 
 EXPORT_SYMBOL(usb_gadget_unregister_driver);
-EXPORT_SYMBOL(usb_gadget_register_driver);
+EXPORT_SYMBOL(usb_gadget_probe_driver);
 
 module_init(udc_init);
 module_exit(udc_exit);
diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c
index 6fca870..529d216 100644
--- a/drivers/usb/musb/musb_gadget.c
+++ b/drivers/usb/musb/musb_gadget.c
@@ -1698,7 +1698,8 @@ void musb_gadget_cleanup(struct musb *musb)
  * @param driver the gadget driver
  * @return <0 if error, 0 if everything is fine
  */
-int usb_gadget_register_driver(struct usb_gadget_driver *driver)
+int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
+		int (*bind)(struct usb_gadget *))
 {
 	int retval;
 	unsigned long flags;
@@ -1706,8 +1707,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 
 	if (!driver
 			|| driver->speed != USB_SPEED_HIGH
-			|| !driver->bind
-			|| !driver->setup)
+			|| !bind || !driver->setup)
 		return -EINVAL;
 
 	/* driver must be initialized to support peripheral mode */
@@ -1735,7 +1735,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 	spin_unlock_irqrestore(&musb->lock, flags);
 
 	if (retval == 0) {
-		retval = driver->bind(&musb->g);
+		retval = bind(&musb->g);
 		if (retval != 0) {
 			DBG(3, "bind to driver %s failed --> %d\n",
 					driver->driver.name, retval);
diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h
index d3ef42d..aa4a877 100644
--- a/include/linux/usb/gadget.h
+++ b/include/linux/usb/gadget.h
@@ -798,17 +798,38 @@ struct usb_gadget_driver {
  */
 
 /**
+ * usb_gadget_probe_driver - probe a gadget driver
+ * @driver: the driver being registered
+ * Context: can sleep
+ *
+ * Call this in your gadget driver's module initialization function,
+ * to tell the underlying usb controller driver about your driver.
+ * The bind() function will be called to bind it to a gadget before this
+ * registration call returns.  It's expected that the bind() function will
+ * be in init sections.
+ */
+int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
+		int (*bind)(struct usb_gadget *));
+
+/**
  * usb_gadget_register_driver - register a gadget driver
- * @driver:the driver being registered
+ * @driver: the driver being registered
  * Context: can sleep
  *
  * Call this in your gadget driver's module initialization function,
  * to tell the underlying usb controller driver about your driver.
  * The driver's bind() function will be called to bind it to a
  * gadget before this registration call returns.  It's expected that
- * the bind() functions will be in init sections.
+ * the bind() functions will be in init sections.  As this results in
+ * a section mismatch better use usb_gadget_probe_driver directly though.
  */
-int usb_gadget_register_driver(struct usb_gadget_driver *driver);
+static inline int usb_gadget_register_driver(struct usb_gadget_driver *driver)
+{
+	if (!driver)
+		return -EINVAL;
+
+	return usb_gadget_probe_driver(driver, driver->bind);
+}
 
 /**
  * usb_gadget_unregister_driver - unregister a gadget driver
-- 
1.7.1

Re: [PATCH RFC] usb gadget: introduce usb_gadget_probe_driver

[Julia Lawall]

> diff --git a/drivers/usb/gadget/amd5536udc.c b/drivers/usb/gadget/amd5536udc.c
> index 731150d..c266c1e 100644
> --- a/drivers/usb/gadget/amd5536udc.c
> +++ b/drivers/usb/gadget/amd5536udc.c
> @@ -1954,13 +1954,14 @@ static int setup_ep0(struct udc *dev)
>  }
>  
>  /* Called by gadget driver to register itself */
> -int usb_gadget_register_driver(struct usb_gadget_driver *driver)
> +int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
> +		int (*bind)(struct usb_gadget *))
>  {
>  	struct udc		*dev = udc;
>  	int			retval;
>  	u32 tmp;
>  
> -	if (!driver || !driver->bind || !driver->setup
> +	if (!driver || bind || !driver->setup

Is it intentional that !driver->bind has become just bind in this case?  
That doesn't seem to happen in the other cases.

julia

Re: [PATCH RFC] usb gadget: introduce usb_gadget_probe_driver

[Michał Nazarewicz]

On Fri, 30 Jul 2010 16:49:14 +0200, Uwe Kleine-K=C3=B6nig <u.kleine-koen=
ig@pengutronix.de> wrote:

> This is like usb_gadget_register_driver with the only difference that =
it
> gets the bind function as parameter instead of using driver->bind.  Th=
is
> allows fixing section mismatches like
>
> 	WARNING: drivers/usb/gadget/g_printer.o(.data+0xc): Section mismatch =
in
> 	reference from the variable printer_driver to the function
> 	.init.text:printer_bind()
> 	The variable printer_driver references
> 	the function __init printer_bind()
>
> by using usb_gadget_probe_driver with driver->bind =3D NULL.  When all=

> drivers are fixed to use the new function the bind member of struct
> usb_gadget_driver can go away.
>
> Signed-off-by: Uwe Kleine-K=C3=B6nig <u.kleine-koenig@pengutronix.de>
> Cc: Michal Nazarewicz <m.nazarewicz@samsung.com>
> Cc: Greg Kroah-Hartman <gregkh@suse.de>
> ---
> Hello,
>
> there is an alternative patch in Greg's tree [1], but IMHO mine is
> better as it doesn't need __ref.
>
> Thoughts?

Personally I don't see advantage of this over changing the __init to __r=
ef.
Or am I missing something?  I see your patch as an unnecessary API chang=
e.
The way I understand it, __ref was introduced exactly for cases like thi=
s
one where function is referenced from "normal" data but used only during=

init.  Could you try to clarify for me why you think your solution is
better then mine?

-- =

Best regards,                                        _     _
| Humble Liege of Serenely Enlightened Majesty of  o' \,=3D./ `o
| Computer Science,  Micha=C5=82 "mina86" Nazarewicz       (o o)
+----[mina86*mina86.com]---[mina86*jabber.org]----ooO--(_)--Ooo--

Re: [PATCH RFC] usb gadget: introduce usb_gadget_probe_driver

[Uwe Kleine-König]

Hello Michał,

On Fri, Jul 30, 2010 at 05:16:46PM +0200, Michał Nazarewicz wrote:
> On Fri, 30 Jul 2010 16:49:14 +0200, Uwe Kleine-König <u.kleine-koenig@pengutronix.de> wrote:
>
>> This is like usb_gadget_register_driver with the only difference that it
>> gets the bind function as parameter instead of using driver->bind.  This
>> allows fixing section mismatches like
>>
>> 	WARNING: drivers/usb/gadget/g_printer.o(.data+0xc): Section mismatch in
>> 	reference from the variable printer_driver to the function
>> 	.init.text:printer_bind()
>> 	The variable printer_driver references
>> 	the function __init printer_bind()
>>
>> by using usb_gadget_probe_driver with driver->bind = NULL.  When all
>> drivers are fixed to use the new function the bind member of struct
>> usb_gadget_driver can go away.
>>
>> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
>> Cc: Michal Nazarewicz <m.nazarewicz@samsung.com>
>> Cc: Greg Kroah-Hartman <gregkh@suse.de>
>> ---
>> Hello,
>>
>> there is an alternative patch in Greg's tree [1], but IMHO mine is
>> better as it doesn't need __ref.
>>
>> Thoughts?
>
> Personally I don't see advantage of this over changing the __init to __ref.
> Or am I missing something?  I see your patch as an unnecessary API change.
> The way I understand it, __ref was introduced exactly for cases like this
> one where function is referenced from "normal" data but used only during
> init.  Could you try to clarify for me why you think your solution is
> better then mine?
- Using __ref instead of __init moves all bind functions from .init.text
  to .text and so the code isn't freed after booting or module loading.
  (OK, you could fix this by marking the driver structs as __ref and
  keep __init for the bind functions.)

- Using __ref might hide section mismatches.  (Your patch hasn't this
  problem as the bind functions used to live in .init.text, so any
  reference to .init should be OK assuming that it was OK to live in
  .init.text in the first place.  But when marking the driver structs
  this is an issue.)  That's why I don't like __ref and said my patch
  were better as it doesn't make use of it.

- The bind functions are only called at init time, so there is no need
  to save a pointer to it.

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |

Re: [PATCH RFC] usb gadget: introduce usb_gadget_probe_driver

[Uwe Kleine-König]

On Fri, Jul 30, 2010 at 05:14:46PM +0200, Julia Lawall wrote:
> > diff --git a/drivers/usb/gadget/amd5536udc.c b/drivers/usb/gadget/amd5536udc.c
> > index 731150d..c266c1e 100644
> > --- a/drivers/usb/gadget/amd5536udc.c
> > +++ b/drivers/usb/gadget/amd5536udc.c
> > @@ -1954,13 +1954,14 @@ static int setup_ep0(struct udc *dev)
> >  }
> >  
> >  /* Called by gadget driver to register itself */
> > -int usb_gadget_register_driver(struct usb_gadget_driver *driver)
> > +int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
> > +		int (*bind)(struct usb_gadget *))
> >  {
> >  	struct udc		*dev = udc;
> >  	int			retval;
> >  	u32 tmp;
> >  
> > -	if (!driver || !driver->bind || !driver->setup
> > +	if (!driver || bind || !driver->setup
> 
> Is it intentional that !driver->bind has become just bind in this case?  
> That doesn't seem to happen in the other cases.
Yes, this is what the patch is about.  bind got a parameter to the probe
function.  This is used in favour of driver->bind to allow driver to
live in .data and bind to live in .init.text without a section mismatch.

So the other cases are broken.  I'll recheck.

Thanks
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |

Re: [PATCH RFC] usb gadget: introduce usb_gadget_probe_driver

[Michał Nazarewicz]

On Fri, 30 Jul 2010 17:26:02 +0200, Uwe Kleine-K=C3=B6nig <u.kleine-koen=
ig@pengutronix.de> wrote:
> On Fri, Jul 30, 2010 at 05:16:46PM +0200, Micha=C5=82 Nazarewicz wrote=
:
>> On Fri, 30 Jul 2010 16:49:14 +0200, Uwe Kleine-K=C3=B6nig <u.kleine-k=
oenig@pengutronix.de> wrote:
>>
>>> This is like usb_gadget_register_driver with the only difference tha=
t it
>>> gets the bind function as parameter instead of using driver->bind.  =
This
>>> allows fixing section mismatches like
>>>
>>> 	WARNING: drivers/usb/gadget/g_printer.o(.data+0xc): Section mismatc=
h in
>>> 	reference from the variable printer_driver to the function
>>> 	.init.text:printer_bind()
>>> 	The variable printer_driver references
>>> 	the function __init printer_bind()
>>>
>>> by using usb_gadget_probe_driver with driver->bind =3D NULL.  When a=
ll
>>> drivers are fixed to use the new function the bind member of struct
>>> usb_gadget_driver can go away.
>>>
>>> Signed-off-by: Uwe Kleine-K=C3=B6nig <u.kleine-koenig@pengutronix.de=
>
>>> Cc: Michal Nazarewicz <m.nazarewicz@samsung.com>
>>> Cc: Greg Kroah-Hartman <gregkh@suse.de>

BTW. Dunno if there is a reason to put me on Cc and Greg will be in
Signed-off-by anyway.

>>> ---
>>> Hello,
>>>
>>> there is an alternative patch in Greg's tree [1], but IMHO mine is
>>> better as it doesn't need __ref.
>>>
>>> Thoughts?
>>
>> Personally I don't see advantage of this over changing the __init to =
__ref.
>> Or am I missing something?  I see your patch as an unnecessary API ch=
ange.
>> The way I understand it, __ref was introduced exactly for cases like =
this
>> one where function is referenced from "normal" data but used only dur=
ing
>> init.  Could you try to clarify for me why you think your solution is=

>> better then mine?

> - Using __ref instead of __init moves all bind functions from .init.te=
xt
>   to .text and so the code isn't freed after booting or module loading=
.
>   (OK, you could fix this by marking the driver structs as __ref and
>   keep __init for the bind functions.)

I believe this to be untrue.  __ref puts code in .ref.text which AFAIK i=
s
freed.

> - Using __ref might hide section mismatches.  (Your patch hasn't this
>   problem as the bind functions used to live in .init.text, so any
>   reference to .init should be OK assuming that it was OK to live in
>   .init.text in the first place.  But when marking the driver structs
>   this is an issue.)  That's why I don't like __ref and said my patch
>   were better as it doesn't make use of it.
>
> - The bind functions are only called at init time, so there is no need=

>   to save a pointer to it.

OK, I see some merit in this approach.  However, the same issue is with
usb_configuration and ?usb_composite_driver -- those should be changed
in the same way or it would defeat the purpose of the patch.

-- =

Best regards,                                        _     _
| Humble Liege of Serenely Enlightened Majesty of  o' \,=3D./ `o
| Computer Science,  Micha=C5=82 "mina86" Nazarewicz       (o o)
+----[mina86*mina86.com]---[mina86*jabber.org]----ooO--(_)--Ooo--

Re: [PATCH RFC] usb gadget: introduce usb_gadget_probe_driver

[David Brownell]

=0A> - The bind functions are only called at init time, so there=0A> is no =
need=0A> =C2=A0 to save a pointer to it.=0A=0ARight.  Let's retain the spac=
e-saving behaviors=0Aby keeping init-only code in init sections.=0A=0A- Dav=
e=0A

Re: [PATCH RFC] usb gadget: introduce usb_gadget_probe_driver

[Uwe Kleine-König]

On Fri, Jul 30, 2010 at 06:08:23PM +0200, Michał Nazarewicz wrote:
> On Fri, 30 Jul 2010 17:26:02 +0200, Uwe Kleine-König <u.kleine-koenig@pengutronix.de> wrote:
>> On Fri, Jul 30, 2010 at 05:16:46PM +0200, Michał Nazarewicz wrote:
>>> On Fri, 30 Jul 2010 16:49:14 +0200, Uwe Kleine-König <u.kleine-koenig@pengutronix.de> wrote:
>>>
>>>> This is like usb_gadget_register_driver with the only difference that it
>>>> gets the bind function as parameter instead of using driver->bind.  This
>>>> allows fixing section mismatches like
>>>>
>>>> 	WARNING: drivers/usb/gadget/g_printer.o(.data+0xc): Section mismatch in
>>>> 	reference from the variable printer_driver to the function
>>>> 	.init.text:printer_bind()
>>>> 	The variable printer_driver references
>>>> 	the function __init printer_bind()
>>>>
>>>> by using usb_gadget_probe_driver with driver->bind = NULL.  When all
>>>> drivers are fixed to use the new function the bind member of struct
>>>> usb_gadget_driver can go away.
>>>>
>>>> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
>>>> Cc: Michal Nazarewicz <m.nazarewicz@samsung.com>
>>>> Cc: Greg Kroah-Hartman <gregkh@suse.de>
>
> BTW. Dunno if there is a reason to put me on Cc and Greg will be in
> Signed-off-by anyway.
>
>>>> ---
>>>> Hello,
>>>>
>>>> there is an alternative patch in Greg's tree [1], but IMHO mine is
>>>> better as it doesn't need __ref.
>>>>
>>>> Thoughts?
>>>
>>> Personally I don't see advantage of this over changing the __init to __ref.
>>> Or am I missing something?  I see your patch as an unnecessary API change.
>>> The way I understand it, __ref was introduced exactly for cases like this
>>> one where function is referenced from "normal" data but used only during
>>> init.  Could you try to clarify for me why you think your solution is
>>> better then mine?
>
>> - Using __ref instead of __init moves all bind functions from .init.text
>>   to .text and so the code isn't freed after booting or module loading.
>>   (OK, you could fix this by marking the driver structs as __ref and
>>   keep __init for the bind functions.)
>
> I believe this to be untrue.  __ref puts code in .ref.text which AFAIK is
> freed.
I'm pretty sure it's not freed.  .ref.text is of course correct.

>> - Using __ref might hide section mismatches.  (Your patch hasn't this
>>   problem as the bind functions used to live in .init.text, so any
>>   reference to .init should be OK assuming that it was OK to live in
>>   .init.text in the first place.  But when marking the driver structs
>>   this is an issue.)  That's why I don't like __ref and said my patch
>>   were better as it doesn't make use of it.
>>
>> - The bind functions are only called at init time, so there is no need
>>   to save a pointer to it.
>
> OK, I see some merit in this approach.  However, the same issue is with
> usb_configuration and ?usb_composite_driver -- those should be changed
> in the same way or it would defeat the purpose of the patch.
I didn't skip these on purpose.  I just stumbled over the gadget drivers
first.

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |

Re: [PATCH RFC] usb gadget: introduce usb_gadget_probe_driver

[Michał Nazarewicz]

On Fri, 30 Jul 2010 16:49:14 +0200, Uwe Kleine-K=C3=B6nig <u.kleine-koen=
ig@pengutronix.de> wrote:
> by using usb_gadget_probe_driver with driver->bind =3D NULL.  When all=

> drivers are fixed to use the new function the bind member of struct
> usb_gadget_driver can go away.

On second thought, would it be hard to just fix all the gadgets?  It's n=
ot like there
are thousands of them so it shouldn't take that long.  Moreover, since y=
ou'd remove
the bind field and change the prototype of the usb_gadget_register() all=
 instances
would be found at compile time.

With that and the other functions which use bind callbacks (usb_add_conf=
iguration(),
usb_composite_register()) the patch would be much better in my opinion a=
nd also
much better then my approach with __ref.

-- =

Best regards,                                        _     _
| Humble Liege of Serenely Enlightened Majesty of  o' \,=3D./ `o
| Computer Science,  Micha=C5=82 "mina86" Nazarewicz       (o o)
+----[mina86*mina86.com]---[mina86*jabber.org]----ooO--(_)--Ooo--

[PATCH] usb gadget: don't save bind callback in struct usb_gadget_driver

[Uwe Kleine-König]

The bind function is only needed at probe time, so there is no value in
saving it .

To accomplish this the function to register a gadget driver now takes
the bind function as a second argument.  To make things clearer rename
the function to resemble platform_driver_probe vs.
platform_driver_register.

This fixes many section mismatches like

	WARNING: drivers/usb/gadget/g_printer.o(.data+0xc): Section mismatch in
	reference from the variable printer_driver to the function
	.init.text:printer_bind()
	The variable printer_driver references
	the function __init printer_bind()

All callers are fixed.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Cc: Michał Nazarewicz <m.nazarewicz@samsung.com>
Cc: David Brownell <david-b@pacbell.net>
Cc: Julia Lawall <julia@diku.dk>
Cc: Greg Kroah-Hartman <gregkh@suse.de>
---
Hello,

now that Michał seems to be happy with my approach I made the effort to come up
with a complete patch that fixes the section mismatches.

Note this patch conflicts with usb-gadget-section-mismatch-warning-fixed.patch
in Greg's usb tree.  Greg, up to you to decide if it's already to late to drop
the old patch in favour of mine.

Julia, you found an inconsitency in my first patch.  I didn't, so can
you please point out in more words what you meant?

Best regards
Uwe

 drivers/usb/gadget/amd5536udc.c     |    9 +++++----
 drivers/usb/gadget/at91_udc.c       |   11 ++++++-----
 drivers/usb/gadget/atmel_usba_udc.c |    7 ++++---
 drivers/usb/gadget/ci13xxx_udc.c    |   16 ++++++++--------
 drivers/usb/gadget/composite.c      |    3 +--
 drivers/usb/gadget/dummy_hcd.c      |   10 +++++-----
 drivers/usb/gadget/file_storage.c   |    3 +--
 drivers/usb/gadget/fsl_qe_udc.c     |   12 ++++++------
 drivers/usb/gadget/fsl_udc_core.c   |   10 +++++-----
 drivers/usb/gadget/gmidi.c          |    3 +--
 drivers/usb/gadget/goku_udc.c       |    9 +++++----
 drivers/usb/gadget/imx_udc.c        |    9 +++++----
 drivers/usb/gadget/inode.c          |    6 ++----
 drivers/usb/gadget/langwell_udc.c   |    9 +++++----
 drivers/usb/gadget/lh7a40x_udc.c    |    9 +++++----
 drivers/usb/gadget/m66592-udc.c     |    9 +++++----
 drivers/usb/gadget/net2280.c        |   10 +++++-----
 drivers/usb/gadget/omap_udc.c       |   10 +++++-----
 drivers/usb/gadget/printer.c        |    5 ++---
 drivers/usb/gadget/pxa25x_udc.c     |    9 +++++----
 drivers/usb/gadget/pxa27x_udc.c     |   12 +++++++-----
 drivers/usb/gadget/r8a66597-udc.c   |    9 +++++----
 drivers/usb/gadget/s3c-hsotg.c      |    9 +++++----
 drivers/usb/gadget/s3c2410_udc.c    |   17 ++++++++---------
 drivers/usb/musb/musb_gadget.c      |    8 ++++----
 include/linux/usb/gadget.h          |   14 +++++++-------
 26 files changed, 122 insertions(+), 116 deletions(-)

diff --git a/drivers/usb/gadget/amd5536udc.c b/drivers/usb/gadget/amd5536udc.c
index 731150d..c266c1e 100644
--- a/drivers/usb/gadget/amd5536udc.c
+++ b/drivers/usb/gadget/amd5536udc.c
@@ -1954,13 +1954,14 @@ static int setup_ep0(struct udc *dev)
 }
 
 /* Called by gadget driver to register itself */
-int usb_gadget_register_driver(struct usb_gadget_driver *driver)
+int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
+		int (*bind)(struct usb_gadget *))
 {
 	struct udc		*dev = udc;
 	int			retval;
 	u32 tmp;
 
-	if (!driver || !driver->bind || !driver->setup
+	if (!driver || bind || !driver->setup
 			|| driver->speed != USB_SPEED_HIGH)
 		return -EINVAL;
 	if (!dev)
@@ -1972,7 +1973,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 	dev->driver = driver;
 	dev->gadget.dev.driver = &driver->driver;
 
-	retval = driver->bind(&dev->gadget);
+	retval = bind(&dev->gadget);
 
 	/* Some gadget drivers use both ep0 directions.
 	 * NOTE: to gadget driver, ep0 is just one endpoint...
@@ -2000,7 +2001,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 
 	return 0;
 }
-EXPORT_SYMBOL(usb_gadget_register_driver);
+EXPORT_SYMBOL(usb_gadget_probe_driver);
 
 /* shutdown requests and disconnect from gadget */
 static void
diff --git a/drivers/usb/gadget/at91_udc.c b/drivers/usb/gadget/at91_udc.c
index eaa79c8..a3d04ba 100644
--- a/drivers/usb/gadget/at91_udc.c
+++ b/drivers/usb/gadget/at91_udc.c
@@ -1570,14 +1570,15 @@ static irqreturn_t at91_vbus_irq(int irq, void *_udc)
 	return IRQ_HANDLED;
 }
 
-int usb_gadget_register_driver (struct usb_gadget_driver *driver)
+int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
+		int (*bind)(struct usb_gadget *))
 {
 	struct at91_udc	*udc = &controller;
 	int		retval;
 
 	if (!driver
 			|| driver->speed < USB_SPEED_FULL
-			|| !driver->bind
+			|| !bind
 			|| !driver->setup) {
 		DBG("bad parameter.\n");
 		return -EINVAL;
@@ -1594,9 +1595,9 @@ int usb_gadget_register_driver (struct usb_gadget_driver *driver)
 	udc->enabled = 1;
 	udc->selfpowered = 1;
 
-	retval = driver->bind(&udc->gadget);
+	retval = bind(&udc->gadget);
 	if (retval) {
-		DBG("driver->bind() returned %d\n", retval);
+		DBG("bind() returned %d\n", retval);
 		udc->driver = NULL;
 		udc->gadget.dev.driver = NULL;
 		dev_set_drvdata(&udc->gadget.dev, NULL);
@@ -1612,7 +1613,7 @@ int usb_gadget_register_driver (struct usb_gadget_driver *driver)
 	DBG("bound to %s\n", driver->driver.name);
 	return 0;
 }
-EXPORT_SYMBOL (usb_gadget_register_driver);
+EXPORT_SYMBOL (usb_gadget_probe_driver);
 
 int usb_gadget_unregister_driver (struct usb_gadget_driver *driver)
 {
diff --git a/drivers/usb/gadget/atmel_usba_udc.c b/drivers/usb/gadget/atmel_usba_udc.c
index d623c7b..e4810c6 100644
--- a/drivers/usb/gadget/atmel_usba_udc.c
+++ b/drivers/usb/gadget/atmel_usba_udc.c
@@ -1789,7 +1789,8 @@ out:
 	return IRQ_HANDLED;
 }
 
-int usb_gadget_register_driver(struct usb_gadget_driver *driver)
+int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
+		int (*bind)(struct usb_gadget *))
 {
 	struct usba_udc *udc = &the_udc;
 	unsigned long flags;
@@ -1812,7 +1813,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 	clk_enable(udc->pclk);
 	clk_enable(udc->hclk);
 
-	ret = driver->bind(&udc->gadget);
+	ret = bind(&udc->gadget);
 	if (ret) {
 		DBG(DBG_ERR, "Could not bind to driver %s: error %d\n",
 			driver->driver.name, ret);
@@ -1841,7 +1842,7 @@ err_driver_bind:
 	udc->gadget.dev.driver = NULL;
 	return ret;
 }
-EXPORT_SYMBOL(usb_gadget_register_driver);
+EXPORT_SYMBOL(usb_gadget_probe_driver);
 
 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
 {
diff --git a/drivers/usb/gadget/ci13xxx_udc.c b/drivers/usb/gadget/ci13xxx_udc.c
index 6996951..83fc0d4 100644
--- a/drivers/usb/gadget/ci13xxx_udc.c
+++ b/drivers/usb/gadget/ci13xxx_udc.c
@@ -2340,12 +2340,13 @@ static const struct usb_ep_ops usb_ep_ops = {
 static const struct usb_gadget_ops usb_gadget_ops;
 
 /**
- * usb_gadget_register_driver: register a gadget driver
+ * usb_gadget_probe_driver: register a gadget driver
  *
- * Check usb_gadget_register_driver() at "usb_gadget.h" for details
- * Interrupts are enabled here
+ * Check usb_gadget_probe_driver() at "usb_gadget.h" for details.
+ * Interrupts are enabled here.
  */
-int usb_gadget_register_driver(struct usb_gadget_driver *driver)
+int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
+		int (*bind)(struct usb_gadget *))
 {
 	struct ci13xxx *udc = _udc;
 	unsigned long i, k, flags;
@@ -2354,7 +2355,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 	trace("%p", driver);
 
 	if (driver             == NULL ||
-	    driver->bind       == NULL ||
+	    bind               == NULL ||
 	    driver->unbind     == NULL ||
 	    driver->setup      == NULL ||
 	    driver->disconnect == NULL ||
@@ -2430,7 +2431,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 	udc->gadget.dev.driver = &driver->driver;
 
 	spin_unlock_irqrestore(udc->lock, flags);
-	retval = driver->bind(&udc->gadget);                /* MAY SLEEP */
+	retval = bind(&udc->gadget);                /* MAY SLEEP */
 	spin_lock_irqsave(udc->lock, flags);
 
 	if (retval) {
@@ -2447,7 +2448,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 		usb_gadget_unregister_driver(driver);
 	return retval;
 }
-EXPORT_SYMBOL(usb_gadget_register_driver);
+EXPORT_SYMBOL(usb_gadget_probe_driver);
 
 /**
  * usb_gadget_unregister_driver: unregister a gadget driver
@@ -2462,7 +2463,6 @@ int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
 	trace("%p", driver);
 
 	if (driver             == NULL ||
-	    driver->bind       == NULL ||
 	    driver->unbind     == NULL ||
 	    driver->setup      == NULL ||
 	    driver->disconnect == NULL ||
diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index 391d169..d07960e 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -1112,7 +1112,6 @@ composite_resume(struct usb_gadget *gadget)
 static struct usb_gadget_driver composite_driver = {
 	.speed		= USB_SPEED_HIGH,
 
-	.bind		= composite_bind,
 	.unbind		= composite_unbind,
 
 	.setup		= composite_setup,
@@ -1152,7 +1151,7 @@ int usb_composite_register(struct usb_composite_driver *driver)
 	composite_driver.driver.name = driver->name;
 	composite = driver;
 
-	return usb_gadget_register_driver(&composite_driver);
+	return usb_gadget_probe_driver(&composite_driver, composite_bind);
 }
 
 /**
diff --git a/drivers/usb/gadget/dummy_hcd.c b/drivers/usb/gadget/dummy_hcd.c
index 4f9e578..5860222 100644
--- a/drivers/usb/gadget/dummy_hcd.c
+++ b/drivers/usb/gadget/dummy_hcd.c
@@ -748,7 +748,8 @@ static DEVICE_ATTR (function, S_IRUGO, show_function, NULL);
  */
 
 int
-usb_gadget_register_driver (struct usb_gadget_driver *driver)
+usb_gadget_probe_driver(struct usb_gadget_driver *driver,
+		int (*bind)(struct usb_gadget *))
 {
 	struct dummy	*dum = the_controller;
 	int		retval, i;
@@ -757,8 +758,7 @@ usb_gadget_register_driver (struct usb_gadget_driver *driver)
 		return -EINVAL;
 	if (dum->driver)
 		return -EBUSY;
-	if (!driver->bind || !driver->setup
-			|| driver->speed == USB_SPEED_UNKNOWN)
+	if (!bind || !driver->setup || driver->speed == USB_SPEED_UNKNOWN)
 		return -EINVAL;
 
 	/*
@@ -796,7 +796,7 @@ usb_gadget_register_driver (struct usb_gadget_driver *driver)
 	dum->gadget.dev.driver = &driver->driver;
 	dev_dbg (udc_dev(dum), "binding gadget driver '%s'\n",
 			driver->driver.name);
-	retval = driver->bind(&dum->gadget);
+	retval = bind(&dum->gadget);
 	if (retval) {
 		dum->driver = NULL;
 		dum->gadget.dev.driver = NULL;
@@ -812,7 +812,7 @@ usb_gadget_register_driver (struct usb_gadget_driver *driver)
 	usb_hcd_poll_rh_status (dummy_to_hcd (dum));
 	return 0;
 }
-EXPORT_SYMBOL (usb_gadget_register_driver);
+EXPORT_SYMBOL(usb_gadget_probe_driver);
 
 int
 usb_gadget_unregister_driver (struct usb_gadget_driver *driver)
diff --git a/drivers/usb/gadget/file_storage.c b/drivers/usb/gadget/file_storage.c
index b49d86e..7c858ca 100644
--- a/drivers/usb/gadget/file_storage.c
+++ b/drivers/usb/gadget/file_storage.c
@@ -3541,7 +3541,6 @@ static struct usb_gadget_driver		fsg_driver = {
 	.speed		= USB_SPEED_FULL,
 #endif
 	.function	= (char *) fsg_string_product,
-	.bind		= fsg_bind,
 	.unbind		= fsg_unbind,
 	.disconnect	= fsg_disconnect,
 	.setup		= fsg_setup,
@@ -3583,7 +3582,7 @@ static int __init fsg_init(void)
 	if ((rc = fsg_alloc()) != 0)
 		return rc;
 	fsg = the_fsg;
-	if ((rc = usb_gadget_register_driver(&fsg_driver)) != 0)
+	if ((rc = usb_gadget_probe_driver(&fsg_driver, fsg_bind)) != 0)
 		kref_put(&fsg->ref, fsg_release);
 	return rc;
 }
diff --git a/drivers/usb/gadget/fsl_qe_udc.c b/drivers/usb/gadget/fsl_qe_udc.c
index 82506ca..9b4f4b5 100644
--- a/drivers/usb/gadget/fsl_qe_udc.c
+++ b/drivers/usb/gadget/fsl_qe_udc.c
@@ -2301,9 +2301,10 @@ static irqreturn_t qe_udc_irq(int irq, void *_udc)
 }
 
 /*-------------------------------------------------------------------------
-	Gadget driver register and unregister.
+	Gadget driver probe and unregister.
  --------------------------------------------------------------------------*/
-int usb_gadget_register_driver(struct usb_gadget_driver *driver)
+int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
+		int (*bind)(struct usb_gadget *))
 {
 	int retval;
 	unsigned long flags = 0;
@@ -2314,8 +2315,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 
 	if (!driver || (driver->speed != USB_SPEED_FULL
 			&& driver->speed != USB_SPEED_HIGH)
-			|| !driver->bind || !driver->disconnect
-			|| !driver->setup)
+			|| !bind || !driver->disconnect || !driver->setup)
 		return -EINVAL;
 
 	if (udc_controller->driver)
@@ -2331,7 +2331,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 	udc_controller->gadget.speed = (enum usb_device_speed)(driver->speed);
 	spin_unlock_irqrestore(&udc_controller->lock, flags);
 
-	retval = driver->bind(&udc_controller->gadget);
+	retval = bind(&udc_controller->gadget);
 	if (retval) {
 		dev_err(udc_controller->dev, "bind to %s --> %d",
 				driver->driver.name, retval);
@@ -2352,7 +2352,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 		udc_controller->gadget.name, driver->driver.name);
 	return 0;
 }
-EXPORT_SYMBOL(usb_gadget_register_driver);
+EXPORT_SYMBOL(usb_gadget_probe_driver);
 
 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
 {
diff --git a/drivers/usb/gadget/fsl_udc_core.c b/drivers/usb/gadget/fsl_udc_core.c
index 08a9a62..c16b402 100644
--- a/drivers/usb/gadget/fsl_udc_core.c
+++ b/drivers/usb/gadget/fsl_udc_core.c
@@ -1765,7 +1765,8 @@ static irqreturn_t fsl_udc_irq(int irq, void *_udc)
  * Hook to gadget drivers
  * Called by initialization code of gadget drivers
 *----------------------------------------------------------------*/
-int usb_gadget_register_driver(struct usb_gadget_driver *driver)
+int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
+		int (*bind)(struct usb_gadget *))
 {
 	int retval = -ENODEV;
 	unsigned long flags = 0;
@@ -1775,8 +1776,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 
 	if (!driver || (driver->speed != USB_SPEED_FULL
 				&& driver->speed != USB_SPEED_HIGH)
-			|| !driver->bind || !driver->disconnect
-			|| !driver->setup)
+			|| !bind || !driver->disconnect || !driver->setup)
 		return -EINVAL;
 
 	if (udc_controller->driver)
@@ -1792,7 +1792,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 	spin_unlock_irqrestore(&udc_controller->lock, flags);
 
 	/* bind udc driver to gadget driver */
-	retval = driver->bind(&udc_controller->gadget);
+	retval = bind(&udc_controller->gadget);
 	if (retval) {
 		VDBG("bind to %s --> %d", driver->driver.name, retval);
 		udc_controller->gadget.dev.driver = NULL;
@@ -1814,7 +1814,7 @@ out:
 		       retval);
 	return retval;
 }
-EXPORT_SYMBOL(usb_gadget_register_driver);
+EXPORT_SYMBOL(usb_gadget_probe_driver);
 
 /* Disconnect from gadget driver */
 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
diff --git a/drivers/usb/gadget/gmidi.c b/drivers/usb/gadget/gmidi.c
index 2b56ce6..b33ee5d 100644
--- a/drivers/usb/gadget/gmidi.c
+++ b/drivers/usb/gadget/gmidi.c
@@ -1292,7 +1292,6 @@ static void gmidi_resume(struct usb_gadget *gadget)
 static struct usb_gadget_driver gmidi_driver = {
 	.speed		= USB_SPEED_FULL,
 	.function	= (char *)longname,
-	.bind		= gmidi_bind,
 	.unbind		= gmidi_unbind,
 
 	.setup		= gmidi_setup,
@@ -1309,7 +1308,7 @@ static struct usb_gadget_driver gmidi_driver = {
 
 static int __init gmidi_init(void)
 {
-	return usb_gadget_register_driver(&gmidi_driver);
+	return usb_gadget_probe_driver(&gmidi_driver, gmidi_bind);
 }
 module_init(gmidi_init);
 
diff --git a/drivers/usb/gadget/goku_udc.c b/drivers/usb/gadget/goku_udc.c
index 1088d08..49fbd4d 100644
--- a/drivers/usb/gadget/goku_udc.c
+++ b/drivers/usb/gadget/goku_udc.c
@@ -1343,14 +1343,15 @@ static struct goku_udc	*the_controller;
  * disconnect is reported.  then a host may connect again, or
  * the driver might get unbound.
  */
-int usb_gadget_register_driver(struct usb_gadget_driver *driver)
+int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
+		int (*bind)(struct usb_gadget *))
 {
 	struct goku_udc	*dev = the_controller;
 	int			retval;
 
 	if (!driver
 			|| driver->speed < USB_SPEED_FULL
-			|| !driver->bind
+			|| !bind
 			|| !driver->disconnect
 			|| !driver->setup)
 		return -EINVAL;
@@ -1363,7 +1364,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 	driver->driver.bus = NULL;
 	dev->driver = driver;
 	dev->gadget.dev.driver = &driver->driver;
-	retval = driver->bind(&dev->gadget);
+	retval = bind(&dev->gadget);
 	if (retval) {
 		DBG(dev, "bind to driver %s --> error %d\n",
 				driver->driver.name, retval);
@@ -1380,7 +1381,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 	DBG(dev, "registered gadget driver '%s'\n", driver->driver.name);
 	return 0;
 }
-EXPORT_SYMBOL(usb_gadget_register_driver);
+EXPORT_SYMBOL(usb_gadget_probe_driver);
 
 static void
 stop_activity(struct goku_udc *dev, struct usb_gadget_driver *driver)
diff --git a/drivers/usb/gadget/imx_udc.c b/drivers/usb/gadget/imx_udc.c
index e743122..ed02664 100644
--- a/drivers/usb/gadget/imx_udc.c
+++ b/drivers/usb/gadget/imx_udc.c
@@ -1319,14 +1319,15 @@ static struct imx_udc_struct controller = {
  * USB gadged driver functions
  *******************************************************************************
  */
-int usb_gadget_register_driver(struct usb_gadget_driver *driver)
+int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
+		int (*bind)(struct usb_gadget *))
 {
 	struct imx_udc_struct *imx_usb = &controller;
 	int retval;
 
 	if (!driver
 		|| driver->speed < USB_SPEED_FULL
-		|| !driver->bind
+		|| !bind
 		|| !driver->disconnect
 		|| !driver->setup)
 			return -EINVAL;
@@ -1342,7 +1343,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 	retval = device_add(&imx_usb->gadget.dev);
 	if (retval)
 		goto fail;
-	retval = driver->bind(&imx_usb->gadget);
+	retval = bind(&imx_usb->gadget);
 	if (retval) {
 		D_ERR(imx_usb->dev, "<%s> bind to driver %s --> error %d\n",
 			__func__, driver->driver.name, retval);
@@ -1362,7 +1363,7 @@ fail:
 	imx_usb->gadget.dev.driver = NULL;
 	return retval;
 }
-EXPORT_SYMBOL(usb_gadget_register_driver);
+EXPORT_SYMBOL(usb_gadget_probe_driver);
 
 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
 {
diff --git a/drivers/usb/gadget/inode.c b/drivers/usb/gadget/inode.c
index de8a838..1da5583 100644
--- a/drivers/usb/gadget/inode.c
+++ b/drivers/usb/gadget/inode.c
@@ -1777,7 +1777,6 @@ static struct usb_gadget_driver gadgetfs_driver = {
 	.speed		= USB_SPEED_FULL,
 #endif
 	.function	= (char *) driver_desc,
-	.bind		= gadgetfs_bind,
 	.unbind		= gadgetfs_unbind,
 	.setup		= gadgetfs_setup,
 	.disconnect	= gadgetfs_disconnect,
@@ -1800,7 +1799,6 @@ static int gadgetfs_probe (struct usb_gadget *gadget)
 
 static struct usb_gadget_driver probe_driver = {
 	.speed		= USB_SPEED_HIGH,
-	.bind		= gadgetfs_probe,
 	.unbind		= gadgetfs_nop,
 	.setup		= (void *)gadgetfs_nop,
 	.disconnect	= gadgetfs_nop,
@@ -1914,7 +1912,7 @@ dev_config (struct file *fd, const char __user *buf, size_t len, loff_t *ptr)
 
 	/* triggers gadgetfs_bind(); then we can enumerate. */
 	spin_unlock_irq (&dev->lock);
-	value = usb_gadget_register_driver (&gadgetfs_driver);
+	value = usb_gadget_probe_driver(&gadgetfs_driver, gadgetfs_bind);
 	if (value != 0) {
 		kfree (dev->buf);
 		dev->buf = NULL;
@@ -2053,7 +2051,7 @@ gadgetfs_fill_super (struct super_block *sb, void *opts, int silent)
 		return -ESRCH;
 
 	/* fake probe to determine $CHIP */
-	(void) usb_gadget_register_driver (&probe_driver);
+	(void) usb_gadget_probe_driver(&probe_driver, gadgetfs_probe);
 	if (!CHIP)
 		return -ENODEV;
 
diff --git a/drivers/usb/gadget/langwell_udc.c b/drivers/usb/gadget/langwell_udc.c
index a391351..e7222de 100644
--- a/drivers/usb/gadget/langwell_udc.c
+++ b/drivers/usb/gadget/langwell_udc.c
@@ -1807,7 +1807,8 @@ static DEVICE_ATTR(langwell_udc, S_IRUGO, show_langwell_udc, NULL);
  * the driver might get unbound.
  */
 
-int usb_gadget_register_driver(struct usb_gadget_driver *driver)
+int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
+		int (*bind)(struct usb_gadget *))
 {
 	struct langwell_udc	*dev = the_controller;
 	unsigned long		flags;
@@ -1830,7 +1831,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 
 	spin_unlock_irqrestore(&dev->lock, flags);
 
-	retval = driver->bind(&dev->gadget);
+	retval = bind(&dev->gadget);
 	if (retval) {
 		DBG(dev, "bind to driver %s --> %d\n",
 				driver->driver.name, retval);
@@ -1868,7 +1869,7 @@ err_unbind:
 	DBG(dev, "<--- %s()\n", __func__);
 	return retval;
 }
-EXPORT_SYMBOL(usb_gadget_register_driver);
+EXPORT_SYMBOL(usb_gadget_probe_driver);
 
 
 /* unregister gadget driver */
@@ -1882,7 +1883,7 @@ int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
 
 	DBG(dev, "---> %s()\n", __func__);
 
-	if (unlikely(!driver || !driver->bind || !driver->unbind))
+	if (unlikely(!driver || !driver->unbind))
 		return -EINVAL;
 
 	/* unbind OTG transceiver */
diff --git a/drivers/usb/gadget/lh7a40x_udc.c b/drivers/usb/gadget/lh7a40x_udc.c
index fded3fc..470c45c 100644
--- a/drivers/usb/gadget/lh7a40x_udc.c
+++ b/drivers/usb/gadget/lh7a40x_udc.c
@@ -408,7 +408,8 @@ static void udc_enable(struct lh7a40x_udc *dev)
 /*
   Register entry point for the peripheral controller driver.
 */
-int usb_gadget_register_driver(struct usb_gadget_driver *driver)
+int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
+		int (*bind)(struct usb_gadget *))
 {
 	struct lh7a40x_udc *dev = the_controller;
 	int retval;
@@ -417,7 +418,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 
 	if (!driver
 			|| driver->speed != USB_SPEED_FULL
-			|| !driver->bind
+			|| !bind
 			|| !driver->disconnect
 			|| !driver->setup)
 		return -EINVAL;
@@ -431,7 +432,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 	dev->gadget.dev.driver = &driver->driver;
 
 	device_add(&dev->gadget.dev);
-	retval = driver->bind(&dev->gadget);
+	retval = bind(&dev->gadget);
 	if (retval) {
 		printk(KERN_WARNING "%s: bind to driver %s --> error %d\n",
 		       dev->gadget.name, driver->driver.name, retval);
@@ -454,7 +455,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 	return 0;
 }
 
-EXPORT_SYMBOL(usb_gadget_register_driver);
+EXPORT_SYMBOL(usb_gadget_probe_driver);
 
 /*
   Unregister entry point for the peripheral controller driver.
diff --git a/drivers/usb/gadget/m66592-udc.c b/drivers/usb/gadget/m66592-udc.c
index 166bf71..2ce1f49 100644
--- a/drivers/usb/gadget/m66592-udc.c
+++ b/drivers/usb/gadget/m66592-udc.c
@@ -1454,14 +1454,15 @@ static struct usb_ep_ops m66592_ep_ops = {
 /*-------------------------------------------------------------------------*/
 static struct m66592 *the_controller;
 
-int usb_gadget_register_driver(struct usb_gadget_driver *driver)
+int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
+		int (*bind)(struct usb_gadget *))
 {
 	struct m66592 *m66592 = the_controller;
 	int retval;
 
 	if (!driver
 			|| driver->speed != USB_SPEED_HIGH
-			|| !driver->bind
+			|| !bind
 			|| !driver->setup)
 		return -EINVAL;
 	if (!m66592)
@@ -1480,7 +1481,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 		goto error;
 	}
 
-	retval = driver->bind (&m66592->gadget);
+	retval = bind(&m66592->gadget);
 	if (retval) {
 		pr_err("bind to driver error (%d)\n", retval);
 		device_del(&m66592->gadget.dev);
@@ -1505,7 +1506,7 @@ error:
 
 	return retval;
 }
-EXPORT_SYMBOL(usb_gadget_register_driver);
+EXPORT_SYMBOL(usb_gadget_probe_driver);
 
 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
 {
diff --git a/drivers/usb/gadget/net2280.c b/drivers/usb/gadget/net2280.c
index 9498be8..d09155b 100644
--- a/drivers/usb/gadget/net2280.c
+++ b/drivers/usb/gadget/net2280.c
@@ -1929,7 +1929,8 @@ static void ep0_start (struct net2280 *dev)
  * disconnect is reported.  then a host may connect again, or
  * the driver might get unbound.
  */
-int usb_gadget_register_driver (struct usb_gadget_driver *driver)
+int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
+		int (*bind)(struct usb_gadget *))
 {
 	struct net2280		*dev = the_controller;
 	int			retval;
@@ -1941,8 +1942,7 @@ int usb_gadget_register_driver (struct usb_gadget_driver *driver)
 	 */
 	if (!driver
 			|| driver->speed != USB_SPEED_HIGH
-			|| !driver->bind
-			|| !driver->setup)
+			|| !bind || !driver->setup)
 		return -EINVAL;
 	if (!dev)
 		return -ENODEV;
@@ -1957,7 +1957,7 @@ int usb_gadget_register_driver (struct usb_gadget_driver *driver)
 	driver->driver.bus = NULL;
 	dev->driver = driver;
 	dev->gadget.dev.driver = &driver->driver;
-	retval = driver->bind (&dev->gadget);
+	retval = bind(&dev->gadget);
 	if (retval) {
 		DEBUG (dev, "bind to driver %s --> %d\n",
 				driver->driver.name, retval);
@@ -1993,7 +1993,7 @@ err_unbind:
 	dev->driver = NULL;
 	return retval;
 }
-EXPORT_SYMBOL (usb_gadget_register_driver);
+EXPORT_SYMBOL(usb_gadget_probe_driver);
 
 static void
 stop_activity (struct net2280 *dev, struct usb_gadget_driver *driver)
diff --git a/drivers/usb/gadget/omap_udc.c b/drivers/usb/gadget/omap_udc.c
index f81e4f0..61d3ca6 100644
--- a/drivers/usb/gadget/omap_udc.c
+++ b/drivers/usb/gadget/omap_udc.c
@@ -2102,7 +2102,8 @@ static inline int machine_without_vbus_sense(void)
 		);
 }
 
-int usb_gadget_register_driver (struct usb_gadget_driver *driver)
+int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
+		int (*bind)(struct usb_gadget *))
 {
 	int		status = -ENODEV;
 	struct omap_ep	*ep;
@@ -2114,8 +2115,7 @@ int usb_gadget_register_driver (struct usb_gadget_driver *driver)
 	if (!driver
 			// FIXME if otg, check:  driver->is_otg
 			|| driver->speed < USB_SPEED_FULL
-			|| !driver->bind
-			|| !driver->setup)
+			|| !bind || !driver->setup)
 		return -EINVAL;
 
 	spin_lock_irqsave(&udc->lock, flags);
@@ -2145,7 +2145,7 @@ int usb_gadget_register_driver (struct usb_gadget_driver *driver)
 	if (udc->dc_clk != NULL)
 		omap_udc_enable_clock(1);
 
-	status = driver->bind (&udc->gadget);
+	status = bind(&udc->gadget);
 	if (status) {
 		DBG("bind to %s --> %d\n", driver->driver.name, status);
 		udc->gadget.dev.driver = NULL;
@@ -2186,7 +2186,7 @@ done:
 		omap_udc_enable_clock(0);
 	return status;
 }
-EXPORT_SYMBOL(usb_gadget_register_driver);
+EXPORT_SYMBOL(usb_gadget_probe_driver);
 
 int usb_gadget_unregister_driver (struct usb_gadget_driver *driver)
 {
diff --git a/drivers/usb/gadget/printer.c b/drivers/usb/gadget/printer.c
index 4c3ac5c..317f113 100644
--- a/drivers/usb/gadget/printer.c
+++ b/drivers/usb/gadget/printer.c
@@ -1542,7 +1542,6 @@ static struct usb_gadget_driver printer_driver = {
 	.speed		= DEVSPEED,
 
 	.function	= (char *) driver_desc,
-	.bind		= printer_bind,
 	.unbind		= printer_unbind,
 
 	.setup		= printer_setup,
@@ -1578,11 +1577,11 @@ init(void)
 		return status;
 	}
 
-	status = usb_gadget_register_driver(&printer_driver);
+	status = usb_gadget_probe_driver(&printer_driver, printer_bind);
 	if (status) {
 		class_destroy(usb_gadget_class);
 		unregister_chrdev_region(g_printer_devno, 1);
-		DBG(dev, "usb_gadget_register_driver %x\n", status);
+		DBG(dev, "usb_gadget_probe_driver %x\n", status);
 	}
 
 	return status;
diff --git a/drivers/usb/gadget/pxa25x_udc.c b/drivers/usb/gadget/pxa25x_udc.c
index be5fb34..b37f92c 100644
--- a/drivers/usb/gadget/pxa25x_udc.c
+++ b/drivers/usb/gadget/pxa25x_udc.c
@@ -1280,14 +1280,15 @@ static void udc_enable (struct pxa25x_udc *dev)
  * disconnect is reported.  then a host may connect again, or
  * the driver might get unbound.
  */
-int usb_gadget_register_driver(struct usb_gadget_driver *driver)
+int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
+		int (*bind)(struct usb_gadget *))
 {
 	struct pxa25x_udc	*dev = the_controller;
 	int			retval;
 
 	if (!driver
 			|| driver->speed < USB_SPEED_FULL
-			|| !driver->bind
+			|| !bind
 			|| !driver->disconnect
 			|| !driver->setup)
 		return -EINVAL;
@@ -1308,7 +1309,7 @@ fail:
 		dev->gadget.dev.driver = NULL;
 		return retval;
 	}
-	retval = driver->bind(&dev->gadget);
+	retval = bind(&dev->gadget);
 	if (retval) {
 		DMSG("bind to driver %s --> error %d\n",
 				driver->driver.name, retval);
@@ -1338,7 +1339,7 @@ fail:
 bind_fail:
 	return retval;
 }
-EXPORT_SYMBOL(usb_gadget_register_driver);
+EXPORT_SYMBOL(usb_gadget_probe_driver);
 
 static void
 stop_activity(struct pxa25x_udc *dev, struct usb_gadget_driver *driver)
diff --git a/drivers/usb/gadget/pxa27x_udc.c b/drivers/usb/gadget/pxa27x_udc.c
index 85b0d89..798d280 100644
--- a/drivers/usb/gadget/pxa27x_udc.c
+++ b/drivers/usb/gadget/pxa27x_udc.c
@@ -1792,8 +1792,9 @@ static void udc_enable(struct pxa_udc *udc)
 }
 
 /**
- * usb_gadget_register_driver - Register gadget driver
+ * usb_gadget_probe_driver - Register gadget driver
  * @driver: gadget driver
+ * @bind: bind function
  *
  * When a driver is successfully registered, it will receive control requests
  * including set_configuration(), which enables non-control requests.  Then
@@ -1805,12 +1806,13 @@ static void udc_enable(struct pxa_udc *udc)
  *
  * Returns 0 if no error, -EINVAL, -ENODEV, -EBUSY otherwise
  */
-int usb_gadget_register_driver(struct usb_gadget_driver *driver)
+int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
+		int (*bind)(struct usb_gadget *))
 {
 	struct pxa_udc *udc = the_controller;
 	int retval;
 
-	if (!driver || driver->speed < USB_SPEED_FULL || !driver->bind
+	if (!driver || driver->speed < USB_SPEED_FULL || !bind
 			|| !driver->disconnect || !driver->setup)
 		return -EINVAL;
 	if (!udc)
@@ -1828,7 +1830,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 		dev_err(udc->dev, "device_add error %d\n", retval);
 		goto add_fail;
 	}
-	retval = driver->bind(&udc->gadget);
+	retval = bind(&udc->gadget);
 	if (retval) {
 		dev_err(udc->dev, "bind to driver %s --> error %d\n",
 			driver->driver.name, retval);
@@ -1859,7 +1861,7 @@ add_fail:
 	udc->gadget.dev.driver = NULL;
 	return retval;
 }
-EXPORT_SYMBOL(usb_gadget_register_driver);
+EXPORT_SYMBOL(usb_gadget_probe_driver);
 
 
 /**
diff --git a/drivers/usb/gadget/r8a66597-udc.c b/drivers/usb/gadget/r8a66597-udc.c
index 70a8178..5545d41 100644
--- a/drivers/usb/gadget/r8a66597-udc.c
+++ b/drivers/usb/gadget/r8a66597-udc.c
@@ -1405,14 +1405,15 @@ static struct usb_ep_ops r8a66597_ep_ops = {
 /*-------------------------------------------------------------------------*/
 static struct r8a66597 *the_controller;
 
-int usb_gadget_register_driver(struct usb_gadget_driver *driver)
+int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
+		int (*bind)(struct usb_gadget *))
 {
 	struct r8a66597 *r8a66597 = the_controller;
 	int retval;
 
 	if (!driver
 			|| driver->speed != USB_SPEED_HIGH
-			|| !driver->bind
+			|| !bind
 			|| !driver->setup)
 		return -EINVAL;
 	if (!r8a66597)
@@ -1431,7 +1432,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 		goto error;
 	}
 
-	retval = driver->bind(&r8a66597->gadget);
+	retval = bind(&r8a66597->gadget);
 	if (retval) {
 		printk(KERN_ERR "bind to driver error (%d)\n", retval);
 		device_del(&r8a66597->gadget.dev);
@@ -1456,7 +1457,7 @@ error:
 
 	return retval;
 }
-EXPORT_SYMBOL(usb_gadget_register_driver);
+EXPORT_SYMBOL(usb_gadget_probe_driver);
 
 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
 {
diff --git a/drivers/usb/gadget/s3c-hsotg.c b/drivers/usb/gadget/s3c-hsotg.c
index 26193ec..89f04bc 100644
--- a/drivers/usb/gadget/s3c-hsotg.c
+++ b/drivers/usb/gadget/s3c-hsotg.c
@@ -2478,7 +2478,8 @@ static int s3c_hsotg_corereset(struct s3c_hsotg *hsotg)
 	return 0;
 }
 
-int usb_gadget_register_driver(struct usb_gadget_driver *driver)
+int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
+		int (*bind)(struct usb_gadget *))
 {
 	struct s3c_hsotg *hsotg = our_hsotg;
 	int ret;
@@ -2498,7 +2499,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 		dev_err(hsotg->dev, "%s: bad speed\n", __func__);
 	}
 
-	if (!driver->bind || !driver->setup) {
+	if (!bind || !driver->setup) {
 		dev_err(hsotg->dev, "%s: missing entry points\n", __func__);
 		return -EINVAL;
 	}
@@ -2517,7 +2518,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 		goto err;
 	}
 
-	ret = driver->bind(&hsotg->gadget);
+	ret = bind(&hsotg->gadget);
 	if (ret) {
 		dev_err(hsotg->dev, "failed bind %s\n", driver->driver.name);
 
@@ -2641,7 +2642,7 @@ err:
 	hsotg->gadget.dev.driver = NULL;
 	return ret;
 }
-EXPORT_SYMBOL(usb_gadget_register_driver);
+EXPORT_SYMBOL(usb_gadget_probe_driver);
 
 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
 {
diff --git a/drivers/usb/gadget/s3c2410_udc.c b/drivers/usb/gadget/s3c2410_udc.c
index e724a05..a281606 100644
--- a/drivers/usb/gadget/s3c2410_udc.c
+++ b/drivers/usb/gadget/s3c2410_udc.c
@@ -1628,15 +1628,15 @@ static void s3c2410_udc_enable(struct s3c2410_udc *dev)
 }
 
 /*
- *	usb_gadget_register_driver
+ *	usb_gadget_probe_driver
  */
-int usb_gadget_register_driver(struct usb_gadget_driver *driver)
+int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
+		int (*bind)(struct usb_gadget *))
 {
 	struct s3c2410_udc *udc = the_controller;
 	int		retval;
 
-	dprintk(DEBUG_NORMAL, "usb_gadget_register_driver() '%s'\n",
-		driver->driver.name);
+	dprintk(DEBUG_NORMAL, "%s() '%s'\n", __func__, driver->driver.name);
 
 	/* Sanity checks */
 	if (!udc)
@@ -1645,10 +1645,9 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 	if (udc->driver)
 		return -EBUSY;
 
-	if (!driver->bind || !driver->setup
-			|| driver->speed < USB_SPEED_FULL) {
+	if (!bind || !driver->setup || driver->speed < USB_SPEED_FULL) {
 		printk(KERN_ERR "Invalid driver: bind %p setup %p speed %d\n",
-			driver->bind, driver->setup, driver->speed);
+			bind, driver->setup, driver->speed);
 		return -EINVAL;
 	}
 #if defined(MODULE)
@@ -1671,7 +1670,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 	dprintk(DEBUG_NORMAL, "binding gadget driver '%s'\n",
 		driver->driver.name);
 
-	if ((retval = driver->bind (&udc->gadget)) != 0) {
+	if ((retval = bind(&udc->gadget)) != 0) {
 		device_del(&udc->gadget.dev);
 		goto register_error;
 	}
@@ -2045,7 +2044,7 @@ static void __exit udc_exit(void)
 }
 
 EXPORT_SYMBOL(usb_gadget_unregister_driver);
-EXPORT_SYMBOL(usb_gadget_register_driver);
+EXPORT_SYMBOL(usb_gadget_probe_driver);
 
 module_init(udc_init);
 module_exit(udc_exit);
diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c
index 6fca870..529d216 100644
--- a/drivers/usb/musb/musb_gadget.c
+++ b/drivers/usb/musb/musb_gadget.c
@@ -1698,7 +1698,8 @@ void musb_gadget_cleanup(struct musb *musb)
  * @param driver the gadget driver
  * @return <0 if error, 0 if everything is fine
  */
-int usb_gadget_register_driver(struct usb_gadget_driver *driver)
+int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
+		int (*bind)(struct usb_gadget *))
 {
 	int retval;
 	unsigned long flags;
@@ -1706,8 +1707,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 
 	if (!driver
 			|| driver->speed != USB_SPEED_HIGH
-			|| !driver->bind
-			|| !driver->setup)
+			|| !bind || !driver->setup)
 		return -EINVAL;
 
 	/* driver must be initialized to support peripheral mode */
@@ -1735,7 +1735,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 	spin_unlock_irqrestore(&musb->lock, flags);
 
 	if (retval == 0) {
-		retval = driver->bind(&musb->g);
+		retval = bind(&musb->g);
 		if (retval != 0) {
 			DBG(3, "bind to driver %s failed --> %d\n",
 					driver->driver.name, retval);
diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h
index d3ef42d..d96ebb9 100644
--- a/include/linux/usb/gadget.h
+++ b/include/linux/usb/gadget.h
@@ -774,7 +774,6 @@ static inline int usb_gadget_disconnect(struct usb_gadget *gadget)
 struct usb_gadget_driver {
 	char			*function;
 	enum usb_device_speed	speed;
-	int			(*bind)(struct usb_gadget *);
 	void			(*unbind)(struct usb_gadget *);
 	int			(*setup)(struct usb_gadget *,
 					const struct usb_ctrlrequest *);
@@ -798,17 +797,18 @@ struct usb_gadget_driver {
  */
 
 /**
- * usb_gadget_register_driver - register a gadget driver
- * @driver:the driver being registered
+ * usb_gadget_probe_driver - probe a gadget driver
+ * @driver: the driver being registered
  * Context: can sleep
  *
  * Call this in your gadget driver's module initialization function,
  * to tell the underlying usb controller driver about your driver.
- * The driver's bind() function will be called to bind it to a
- * gadget before this registration call returns.  It's expected that
- * the bind() functions will be in init sections.
+ * The bind() function will be called to bind it to a gadget before this
+ * registration call returns.  It's expected that the bind() function will
+ * be in init sections.
  */
-int usb_gadget_register_driver(struct usb_gadget_driver *driver);
+int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
+		int (*bind)(struct usb_gadget *));
 
 /**
  * usb_gadget_unregister_driver - unregister a gadget driver
-- 
1.7.1

Re: [PATCH] usb gadget: don't save bind callback in struct usb_gadget_driver

[Julia Lawall]

> diff --git a/drivers/usb/gadget/amd5536udc.c b/drivers/usb/gadget/amd5536udc.c
> index 731150d..c266c1e 100644
> --- a/drivers/usb/gadget/amd5536udc.c
> +++ b/drivers/usb/gadget/amd5536udc.c
> @@ -1954,13 +1954,14 @@ static int setup_ep0(struct udc *dev)
>  }
>  
>  /* Called by gadget driver to register itself */
> -int usb_gadget_register_driver(struct usb_gadget_driver *driver)
> +int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
> +		int (*bind)(struct usb_gadget *))
>  {
>  	struct udc		*dev = udc;
>  	int			retval;
>  	u32 tmp;
>  
> -	if (!driver || !driver->bind || !driver->setup
> +	if (!driver || bind || !driver->setup

I have the impression that this should be !bind rather than bind.  
That would be like what is done in the patch for 
drivers/usb/gadget/fsl_udc_core.c below


> diff --git a/drivers/usb/gadget/fsl_udc_core.c b/drivers/usb/gadget/fsl_udc_core.c
> index 08a9a62..c16b402 100644
> --- a/drivers/usb/gadget/fsl_udc_core.c
> +++ b/drivers/usb/gadget/fsl_udc_core.c
> @@ -1765,7 +1765,8 @@ static irqreturn_t fsl_udc_irq(int irq, void *_udc)
>   * Hook to gadget drivers
>   * Called by initialization code of gadget drivers
>  *----------------------------------------------------------------*/
> -int usb_gadget_register_driver(struct usb_gadget_driver *driver)
> +int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
> +		int (*bind)(struct usb_gadget *))
>  {
>  	int retval = -ENODEV;
>  	unsigned long flags = 0;
> @@ -1775,8 +1776,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
>  
>  	if (!driver || (driver->speed != USB_SPEED_FULL
>  				&& driver->speed != USB_SPEED_HIGH)
> -			|| !driver->bind || !driver->disconnect
> -			|| !driver->setup)
> +			|| !bind || !driver->disconnect || !driver->setup)
>  		return -EINVAL;

Here !driver->bind is converted to !bind.

julia

Re: [PATCH] usb gadget: don't save bind callback in struct usb_gadget_driver

[Uwe Kleine-König]

On Mon, Aug 02, 2010 at 02:51:36PM +0200, Julia Lawall wrote:
> > diff --git a/drivers/usb/gadget/amd5536udc.c b/drivers/usb/gadget/amd5536udc.c
> > index 731150d..c266c1e 100644
> > --- a/drivers/usb/gadget/amd5536udc.c
> > +++ b/drivers/usb/gadget/amd5536udc.c
> > @@ -1954,13 +1954,14 @@ static int setup_ep0(struct udc *dev)
> >  }
> >  
> >  /* Called by gadget driver to register itself */
> > -int usb_gadget_register_driver(struct usb_gadget_driver *driver)
> > +int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
> > +		int (*bind)(struct usb_gadget *))
> >  {
> >  	struct udc		*dev = udc;
> >  	int			retval;
> >  	u32 tmp;
> >  
> > -	if (!driver || !driver->bind || !driver->setup
> > +	if (!driver || bind || !driver->setup
> 
> I have the impression that this should be !bind rather than bind.  
ah, now I see what you meant.  Obviously you're right.  I fixed it up
locally here for now.  Greg, just tell me when/if you need a fixed
patch.

> That would be like what is done in the patch for 
> drivers/usb/gadget/fsl_udc_core.c below

Thanks
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |

Re: [PATCH] usb gadget: don't save bind callback in struct usb_gadget_driver

[Michał Nazarewicz]

Some random thoughts, one bug and mostly just minor comments:

> @@ -1954,13 +1954,14 @@ static int setup_ep0(struct udc *dev)
>  }
> /* Called by gadget driver to register itself */
> -int usb_gadget_register_driver(struct usb_gadget_driver *driver)
> +int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
> +		int (*bind)(struct usb_gadget *))
>  {
>  	struct udc		*dev =3D udc;
>  	int			retval;
>  	u32 tmp;
>-	if (!driver || !driver->bind || !driver->setup
> +	if (!driver || bind || !driver->setup


** BUG: Should read "!bind".


> diff --git a/drivers/usb/gadget/at91_udc.c b/drivers/usb/gadget/at91_u=
dc.c
> @@ -1612,7 +1613,7 @@ int usb_gadget_register_driver (struct usb_gadge=
t_driver *driver)
>  	DBG("bound to %s\n", driver->driver.name);
>  	return 0;
>  }
> -EXPORT_SYMBOL (usb_gadget_register_driver);
> +EXPORT_SYMBOL (usb_gadget_probe_driver);

How about also correcting space before "("?

> diff --git a/drivers/usb/gadget/atmel_usba_udc.c b/drivers/usb/gadget/=
atmel_usba_udc.c
> @@ -1789,7 +1789,8 @@ out:
>  	return IRQ_HANDLED;
>  }
>-int usb_gadget_register_driver(struct usb_gadget_driver *driver)
> +int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
> +		int (*bind)(struct usb_gadget *))
>  {
>  	struct usba_udc *udc =3D &the_udc;
>  	unsigned long flags;

There was no checking here?  How about adding?

> diff --git a/drivers/usb/gadget/ci13xxx_udc.c b/drivers/usb/gadget/ci1=
3xxx_udc.c
> @@ -2340,12 +2340,13 @@ static const struct usb_ep_ops usb_ep_ops =3D =
{
>  static const struct usb_gadget_ops usb_gadget_ops;
> /**
> - * usb_gadget_register_driver: register a gadget driver
> + * usb_gadget_probe_driver: register a gadget driver
>   *
> - * Check usb_gadget_register_driver() at "usb_gadget.h" for details
> - * Interrupts are enabled here
> + * Check usb_gadget_probe_driver() at "usb_gadget.h" for details.
> + * Interrupts are enabled here.
>   */

usb_gadget.h is the old name.  How about correcting it as well?

> diff --git a/drivers/usb/gadget/file_storage.c b/drivers/usb/gadget/fi=
le_storage.c
> @@ -3583,7 +3582,7 @@ static int __init fsg_init(void)
>  	if ((rc =3D fsg_alloc()) !=3D 0)
>  		return rc;
>  	fsg =3D the_fsg;
> -	if ((rc =3D usb_gadget_register_driver(&fsg_driver)) !=3D 0)
> +	if ((rc =3D usb_gadget_probe_driver(&fsg_driver, fsg_bind)) !=3D 0)

I'm tempted to propose:

+ rc =3D usb_gadget_probe_driver(&fsg_driver, fsg_bind);
+ if (rc !=3D 0)

which is more compatible with coding style but it probably would be inco=
nsistent
with the rest of the code.

> diff --git a/drivers/usb/gadget/langwell_udc.c b/drivers/usb/gadget/la=
ngwell_udc.c
> @@ -1807,7 +1807,8 @@ static DEVICE_ATTR(langwell_udc, S_IRUGO, show_l=
angwell_udc, NULL);
>   * the driver might get unbound.
>   */
>-int usb_gadget_register_driver(struct usb_gadget_driver *driver)
> +int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
> +		int (*bind)(struct usb_gadget *))
>  {
>  	struct langwell_udc	*dev =3D the_controller;
>  	unsigned long		flags;

Again, function has no checking, how about adding?

> diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_ga=
dget.c
> @@ -1698,7 +1698,8 @@ void musb_gadget_cleanup(struct musb *musb)
>   * @param driver the gadget driver
>   * @return <0 if error, 0 if everything is fine
>   */

I've just noticed that it misses @param bind in the comment.  Would be g=
reat to update it
and all other occurrences.

> diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h
> @@ -798,17 +797,18 @@ struct usb_gadget_driver {
>   */
> /**
> - * usb_gadget_register_driver - register a gadget driver
> - * @driver:the driver being registered
> + * usb_gadget_probe_driver - probe a gadget driver
> + * @driver: the driver being registered

+ * @bind: the driver's bind callback.

>   * Context: can sleep
>   *
>   * Call this in your gadget driver's module initialization function,
>   * to tell the underlying usb controller driver about your driver.
> - * The driver's bind() function will be called to bind it to a
> - * gadget before this registration call returns.  It's expected that
> - * the bind() functions will be in init sections.
> + * The bind() function will be called to bind it to a gadget before t=
his
> + * registration call returns.  It's expected that the bind() function=
 will

Maybe "the @bind function" in those two places?

So for what it's worth, I haven't noticed any other obvious problems.

I think it still does not fix all the section mismatch warnings -- would=
 have to look
closer at composite gadgets -- so I think still parts of my patch is leg=
it.

-- =

Best regards,                                        _     _
| Humble Liege of Serenely Enlightened Majesty of  o' \,=3D./ `o
| Computer Science,  Micha=C5=82 "mina86" Nazarewicz       (o o)
+----[mina86*mina86.com]---[mina86*jabber.org]----ooO--(_)--Ooo--

Re: [PATCH] usb gadget: don't save bind callback in struct usb_gadget_driver

[Greg KH]

On Mon, Aug 02, 2010 at 03:12:48PM +0200, Uwe Kleine-König wrote:
> On Mon, Aug 02, 2010 at 02:51:36PM +0200, Julia Lawall wrote:
> > > diff --git a/drivers/usb/gadget/amd5536udc.c b/drivers/usb/gadget/amd5536udc.c
> > > index 731150d..c266c1e 100644
> > > --- a/drivers/usb/gadget/amd5536udc.c
> > > +++ b/drivers/usb/gadget/amd5536udc.c
> > > @@ -1954,13 +1954,14 @@ static int setup_ep0(struct udc *dev)
> > >  }
> > >  
> > >  /* Called by gadget driver to register itself */
> > > -int usb_gadget_register_driver(struct usb_gadget_driver *driver)
> > > +int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
> > > +		int (*bind)(struct usb_gadget *))
> > >  {
> > >  	struct udc		*dev = udc;
> > >  	int			retval;
> > >  	u32 tmp;
> > >  
> > > -	if (!driver || !driver->bind || !driver->setup
> > > +	if (!driver || bind || !driver->setup
> > 
> > I have the impression that this should be !bind rather than bind.  
> ah, now I see what you meant.  Obviously you're right.  I fixed it up
> locally here for now.  Greg, just tell me when/if you need a fixed
> patch.

Didn't you already post a "fixed" patch?

thanks,

greg k-h