usb: gadget: rename usb_gadget_driver::speed to max_speed

This commit renames the “speed” field of the usb_gadget_driver
structure to “max_speed”.  This is so that to make it more
apparent that the field represents the maximum speed gadget
driver can support.

This also make the field look more like fields with the same
name in usb_gadget and usb_composite_driver structures.  All
of those represent the *maximal* speed given entity supports.

After this commit, there are the following fields in various
structures:
* usb_gadget::speed - the current connection speed,
* usb_gadget::max_speed - maximal speed UDC supports,
* usb_gadget_driver::max_speed - maximal speed gadget driver
  supports, and
* usb_composite_driver::max_speed - maximal speed composite
  gadget supports.

Signed-off-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

28 files changed, 41 insertions, 42 deletions

diff --git a/drivers/usb/gadget/amd5536udc.c b/drivers/usb/gadget/amd5536udc.c
index e69cdbca8017..e9a2c5c44454 100644
--- a/drivers/usb/gadget/amd5536udc.c
+++ b/drivers/usb/gadget/amd5536udc.c
@@ -1959,7 +1959,7 @@ static int amd5536_start(struct usb_gadget_driver *driver,
         u32 tmp;
 
         if (!driver || !bind || !driver->setup
-                        || driver->speed < USB_SPEED_HIGH)
+                        || driver->max_speed < USB_SPEED_HIGH)
                 return -EINVAL;
         if (!dev)
                 return -ENODEV;
diff --git a/drivers/usb/gadget/at91_udc.c b/drivers/usb/gadget/at91_udc.c
index 8efe0fa9228d..ac41f71bf9ca 100644
--- a/drivers/usb/gadget/at91_udc.c
+++ b/drivers/usb/gadget/at91_udc.c
@@ -1633,7 +1633,7 @@ static int at91_start(struct usb_gadget_driver *driver,
         unsigned long   flags;
 
         if (!driver
-                        || driver->speed < USB_SPEED_FULL
+                        || driver->max_speed < USB_SPEED_FULL
                         || !bind
                         || !driver->setup) {
                 DBG("bad parameter.\n");
diff --git a/drivers/usb/gadget/ci13xxx_udc.c b/drivers/usb/gadget/ci13xxx_udc.c
index 9767d9170fbd..27e313718422 100644
--- a/drivers/usb/gadget/ci13xxx_udc.c
+++ b/drivers/usb/gadget/ci13xxx_udc.c
@@ -813,7 +813,7 @@ static ssize_t show_driver(struct device *dev, struct device_attribute *attr,
         n += scnprintf(buf + n, PAGE_SIZE - n, "function  = %s\n",
                        (driver->function ? driver->function : ""));
         n += scnprintf(buf + n, PAGE_SIZE - n, "max speed = %d\n",
-                       driver->speed);
+                       driver->max_speed);
 
         return n;
 }
diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index f71b0787983f..a95de6a4a134 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -1535,9 +1535,9 @@ composite_resume(struct usb_gadget *gadget)
 
 static struct usb_gadget_driver composite_driver = {
 #ifdef CONFIG_USB_GADGET_SUPERSPEED
-        .speed          = USB_SPEED_SUPER,
+        .max_speed      = USB_SPEED_SUPER,
 #else
-        .speed          = USB_SPEED_HIGH,
+        .max_speed      = USB_SPEED_HIGH,
 #endif
 
         .unbind         = composite_unbind,
@@ -1584,8 +1584,8 @@ int usb_composite_probe(struct usb_composite_driver *driver,
                 driver->iProduct = driver->name;
         composite_driver.function =  (char *) driver->name;
         composite_driver.driver.name = driver->name;
-        composite_driver.speed = min((u8)composite_driver.speed,
-                                     (u8)driver->max_speed);
+        composite_driver.max_speed =
+                min_t(u8, composite_driver.max_speed, driver->max_speed);
         composite = driver;
         composite_gadget_bind = bind;
 
diff --git a/drivers/usb/gadget/dbgp.c b/drivers/usb/gadget/dbgp.c
index 6256420089f3..19d7bb0df75a 100644
--- a/drivers/usb/gadget/dbgp.c
+++ b/drivers/usb/gadget/dbgp.c
@@ -404,7 +404,7 @@ fail:
 
 static struct usb_gadget_driver dbgp_driver = {
         .function = "dbgp",
-        .speed = USB_SPEED_HIGH,
+        .max_speed = USB_SPEED_HIGH,
         .unbind = dbgp_unbind,
         .setup = dbgp_setup,
         .disconnect = dbgp_disconnect,
diff --git a/drivers/usb/gadget/dummy_hcd.c b/drivers/usb/gadget/dummy_hcd.c
index cf235d84d8b7..db815c2da7ed 100644
--- a/drivers/usb/gadget/dummy_hcd.c
+++ b/drivers/usb/gadget/dummy_hcd.c
@@ -823,19 +823,18 @@ static int dummy_pullup (struct usb_gadget *_gadget, int value)
 
         if (value && dum->driver) {
                 if (mod_data.is_super_speed)
-                        dum->gadget.speed = dum->driver->speed;
+                        dum->gadget.speed = dum->driver->max_speed;
                 else if (mod_data.is_high_speed)
                         dum->gadget.speed = min_t(u8, USB_SPEED_HIGH,
-                                        dum->driver->speed);
+                                        dum->driver->max_speed);
                 else
                         dum->gadget.speed = USB_SPEED_FULL;
                 dummy_udc_udpate_ep0(dum);
 
-                if (dum->gadget.speed < dum->driver->speed)
+                if (dum->gadget.speed < dum->driver->max_speed)
                         dev_dbg(udc_dev(dum), "This device can perform faster"
-                                        " if you connect it to a %s port...\n",
-                                        (dum->driver->speed == USB_SPEED_SUPER ?
-                                         "SuperSpeed" : "HighSpeed"));
+                                " if you connect it to a %s port...\n",
+                                usb_speed_string(dum->driver->max_speed));
         }
         dum_hcd = gadget_to_dummy_hcd(_gadget);
 
@@ -898,7 +897,7 @@ static int dummy_udc_start(struct usb_gadget *g,
         struct dummy_hcd        *dum_hcd = gadget_to_dummy_hcd(g);
         struct dummy            *dum = dum_hcd->dum;
 
-        if (driver->speed == USB_SPEED_UNKNOWN)
+        if (driver->max_speed == USB_SPEED_UNKNOWN)
                 return -EINVAL;
 
         /*
diff --git a/drivers/usb/gadget/file_storage.c b/drivers/usb/gadget/file_storage.c
index e8ff2f1c06cc..e0f30fc70e45 100644
--- a/drivers/usb/gadget/file_storage.c
+++ b/drivers/usb/gadget/file_storage.c
@@ -3604,7 +3604,7 @@ static void fsg_resume(struct usb_gadget *gadget)
 /*-------------------------------------------------------------------------*/
 
 static struct usb_gadget_driver         fsg_driver = {
-        .speed          = USB_SPEED_SUPER,
+        .max_speed      = USB_SPEED_SUPER,
         .function       = (char *) fsg_string_product,
         .unbind         = fsg_unbind,
         .disconnect     = fsg_disconnect,
diff --git a/drivers/usb/gadget/fsl_qe_udc.c b/drivers/usb/gadget/fsl_qe_udc.c
index e00cf92409ce..b7a1efef938d 100644
--- a/drivers/usb/gadget/fsl_qe_udc.c
+++ b/drivers/usb/gadget/fsl_qe_udc.c
@@ -2336,7 +2336,7 @@ static int fsl_qe_start(struct usb_gadget_driver *driver,
         if (!udc_controller)
                 return -ENODEV;
 
-        if (!driver || driver->speed < USB_SPEED_FULL
+        if (!driver || driver->max_speed < USB_SPEED_FULL
                         || !bind || !driver->disconnect || !driver->setup)
                 return -EINVAL;
 
@@ -2350,7 +2350,7 @@ static int fsl_qe_start(struct usb_gadget_driver *driver,
         /* hook up the driver */
         udc_controller->driver = driver;
         udc_controller->gadget.dev.driver = &driver->driver;
-        udc_controller->gadget.speed = (enum usb_device_speed)(driver->speed);
+        udc_controller->gadget.speed = driver->max_speed;
         spin_unlock_irqrestore(&udc_controller->lock, flags);
 
         retval = bind(&udc_controller->gadget);
diff --git a/drivers/usb/gadget/fsl_udc_core.c b/drivers/usb/gadget/fsl_udc_core.c
index 6de8ec753818..d7ea6c076ce9 100644
--- a/drivers/usb/gadget/fsl_udc_core.c
+++ b/drivers/usb/gadget/fsl_udc_core.c
@@ -1934,7 +1934,7 @@ static int fsl_start(struct usb_gadget_driver *driver,
         if (!udc_controller)
                 return -ENODEV;
 
-        if (!driver || driver->speed < USB_SPEED_FULL
+        if (!driver || driver->max_speed < USB_SPEED_FULL
                         || !bind || !driver->disconnect || !driver->setup)
                 return -EINVAL;
 
diff --git a/drivers/usb/gadget/fusb300_udc.c b/drivers/usb/gadget/fusb300_udc.c
index 6e32a60ab3b7..5831cb4a0b35 100644
--- a/drivers/usb/gadget/fusb300_udc.c
+++ b/drivers/usb/gadget/fusb300_udc.c
@@ -1317,7 +1317,7 @@ static int fusb300_udc_start(struct usb_gadget_driver *driver,
         int retval;
 
         if (!driver
-                        || driver->speed < USB_SPEED_FULL
+                        || driver->max_speed < USB_SPEED_FULL
                         || !bind
                         || !driver->setup)
                 return -EINVAL;
diff --git a/drivers/usb/gadget/goku_udc.c b/drivers/usb/gadget/goku_udc.c
index ab9c924eee76..5af70fcce139 100644
--- a/drivers/usb/gadget/goku_udc.c
+++ b/drivers/usb/gadget/goku_udc.c
@@ -1357,7 +1357,7 @@ static int goku_start(struct usb_gadget_driver *driver,
         int                     retval;
 
         if (!driver
-                        || driver->speed < USB_SPEED_FULL
+                        || driver->max_speed < USB_SPEED_FULL
                         || !bind
                         || !driver->disconnect
                         || !driver->setup)
diff --git a/drivers/usb/gadget/imx_udc.c b/drivers/usb/gadget/imx_udc.c
index 2d978c0e7ced..8d1c75abd73d 100644
--- a/drivers/usb/gadget/imx_udc.c
+++ b/drivers/usb/gadget/imx_udc.c
@@ -1336,7 +1336,7 @@ static int imx_udc_start(struct usb_gadget_driver *driver,
         int retval;
 
         if (!driver
-                || driver->speed < USB_SPEED_FULL
+                || driver->max_speed < USB_SPEED_FULL
                 || !bind
                 || !driver->disconnect
                 || !driver->setup)
diff --git a/drivers/usb/gadget/inode.c b/drivers/usb/gadget/inode.c
index 6ccae2707e59..93612519b53a 100644
--- a/drivers/usb/gadget/inode.c
+++ b/drivers/usb/gadget/inode.c
@@ -1766,9 +1766,9 @@ gadgetfs_suspend (struct usb_gadget *gadget)
 
 static struct usb_gadget_driver gadgetfs_driver = {
 #ifdef  CONFIG_USB_GADGET_DUALSPEED
-        .speed          = USB_SPEED_HIGH,
+        .max_speed      = USB_SPEED_HIGH,
 #else
-        .speed          = USB_SPEED_FULL,
+        .max_speed      = USB_SPEED_FULL,
 #endif
         .function       = (char *) driver_desc,
         .unbind         = gadgetfs_unbind,
@@ -1792,7 +1792,7 @@ static int gadgetfs_probe (struct usb_gadget *gadget)
 }
 
 static struct usb_gadget_driver probe_driver = {
-        .speed          = USB_SPEED_HIGH,
+        .max_speed      = USB_SPEED_HIGH,
         .unbind         = gadgetfs_nop,
         .setup          = (void *)gadgetfs_nop,
         .disconnect     = gadgetfs_nop,
diff --git a/drivers/usb/gadget/m66592-udc.c b/drivers/usb/gadget/m66592-udc.c
index a7692c208ea7..3608b3bd5732 100644
--- a/drivers/usb/gadget/m66592-udc.c
+++ b/drivers/usb/gadget/m66592-udc.c
@@ -1472,7 +1472,7 @@ static int m66592_start(struct usb_gadget_driver *driver,
         int retval;
 
         if (!driver
-                        || driver->speed < USB_SPEED_HIGH
+                        || driver->max_speed < USB_SPEED_HIGH
                         || !bind
                         || !driver->setup)
                 return -EINVAL;
diff --git a/drivers/usb/gadget/net2272.c b/drivers/usb/gadget/net2272.c
index d5050f4e8449..4c81d540bc26 100644
--- a/drivers/usb/gadget/net2272.c
+++ b/drivers/usb/gadget/net2272.c
@@ -1459,7 +1459,7 @@ static int net2272_start(struct usb_gadget *_gadget,
         unsigned i;
 
         if (!driver || !driver->unbind || !driver->setup ||
-            driver->speed != USB_SPEED_HIGH)
+            driver->max_speed != USB_SPEED_HIGH)
                 return -EINVAL;
 
         dev = container_of(_gadget, struct net2272, gadget);
diff --git a/drivers/usb/gadget/net2280.c b/drivers/usb/gadget/net2280.c
index 9ee36fd5adae..cf1f36454d08 100644
--- a/drivers/usb/gadget/net2280.c
+++ b/drivers/usb/gadget/net2280.c
@@ -1881,7 +1881,7 @@ static int net2280_start(struct usb_gadget *_gadget,
          * (dev->usb->xcvrdiag & FORCE_FULL_SPEED_MODE)
          * "must not be used in normal operation"
          */
-        if (!driver || driver->speed < USB_SPEED_HIGH
+        if (!driver || driver->max_speed < USB_SPEED_HIGH
                         || !driver->setup)
                 return -EINVAL;
 
diff --git a/drivers/usb/gadget/omap_udc.c b/drivers/usb/gadget/omap_udc.c
index ed01a0f5f119..7db5bbe6251b 100644
--- a/drivers/usb/gadget/omap_udc.c
+++ b/drivers/usb/gadget/omap_udc.c
@@ -2110,7 +2110,7 @@ static int omap_udc_start(struct usb_gadget_driver *driver,
                 return -ENODEV;
         if (!driver
                         // FIXME if otg, check:  driver->is_otg
-                        || driver->speed < USB_SPEED_FULL
+                        || driver->max_speed < USB_SPEED_FULL
                         || !bind || !driver->setup)
                 return -EINVAL;
 
diff --git a/drivers/usb/gadget/pch_udc.c b/drivers/usb/gadget/pch_udc.c
index 7f97b4adba3e..dd2313cce1d3 100644
--- a/drivers/usb/gadget/pch_udc.c
+++ b/drivers/usb/gadget/pch_udc.c
@@ -2693,7 +2693,7 @@ static int pch_udc_start(struct usb_gadget_driver *driver,
         struct pch_udc_dev      *dev = pch_udc;
         int                     retval;
 
-        if (!driver || (driver->speed == USB_SPEED_UNKNOWN) || !bind ||
+        if (!driver || (driver->max_speed == USB_SPEED_UNKNOWN) || !bind ||
             !driver->setup || !driver->unbind || !driver->disconnect) {
                 dev_err(&dev->pdev->dev,
                         "%s: invalid driver parameter\n", __func__);
diff --git a/drivers/usb/gadget/printer.c b/drivers/usb/gadget/printer.c
index b74f49ac95e5..d83134b0f78a 100644
--- a/drivers/usb/gadget/printer.c
+++ b/drivers/usb/gadget/printer.c
@@ -1535,7 +1535,7 @@ fail:
 /*-------------------------------------------------------------------------*/
 
 static struct usb_gadget_driver printer_driver = {
-        .speed          = DEVSPEED,
+        .max_speed      = DEVSPEED,
 
         .function       = (char *) driver_desc,
         .unbind         = printer_unbind,
diff --git a/drivers/usb/gadget/pxa25x_udc.c b/drivers/usb/gadget/pxa25x_udc.c
index c090a7e3ecf8..dd470635f4f7 100644
--- a/drivers/usb/gadget/pxa25x_udc.c
+++ b/drivers/usb/gadget/pxa25x_udc.c
@@ -1264,7 +1264,7 @@ static int pxa25x_start(struct usb_gadget_driver *driver,
         int                     retval;
 
         if (!driver
-                        || driver->speed < USB_SPEED_FULL
+                        || driver->max_speed < USB_SPEED_FULL
                         || !bind
                         || !driver->disconnect
                         || !driver->setup)
diff --git a/drivers/usb/gadget/pxa27x_udc.c b/drivers/usb/gadget/pxa27x_udc.c
index 18b6b091f2a6..f4c44eb806c3 100644
--- a/drivers/usb/gadget/pxa27x_udc.c
+++ b/drivers/usb/gadget/pxa27x_udc.c
@@ -1807,7 +1807,7 @@ static int pxa27x_udc_start(struct usb_gadget_driver *driver,
         struct pxa_udc *udc = the_controller;
         int retval;
 
-        if (!driver || driver->speed < USB_SPEED_FULL || !bind
+        if (!driver || driver->max_speed < USB_SPEED_FULL || !bind
                         || !driver->disconnect || !driver->setup)
                 return -EINVAL;
         if (!udc)
diff --git a/drivers/usb/gadget/r8a66597-udc.c b/drivers/usb/gadget/r8a66597-udc.c
index 3666d7c54e24..f5b8d215e1d5 100644
--- a/drivers/usb/gadget/r8a66597-udc.c
+++ b/drivers/usb/gadget/r8a66597-udc.c
@@ -1746,7 +1746,7 @@ static int r8a66597_start(struct usb_gadget *gadget,
         struct r8a66597 *r8a66597 = gadget_to_r8a66597(gadget);
 
         if (!driver
-                        || driver->speed < USB_SPEED_HIGH
+                        || driver->max_speed < USB_SPEED_HIGH
                         || !driver->setup)
                 return -EINVAL;
         if (!r8a66597)
diff --git a/drivers/usb/gadget/s3c-hsotg.c b/drivers/usb/gadget/s3c-hsotg.c
index 6bc7ad87c306..d098c36cb587 100644
--- a/drivers/usb/gadget/s3c-hsotg.c
+++ b/drivers/usb/gadget/s3c-hsotg.c
@@ -2586,7 +2586,7 @@ static int s3c_hsotg_start(struct usb_gadget_driver *driver,
                 return -EINVAL;
         }
 
-        if (driver->speed < USB_SPEED_FULL)
+        if (driver->max_speed < USB_SPEED_FULL)
                 dev_err(hsotg->dev, "%s: bad speed\n", __func__);
 
         if (!bind || !driver->setup) {
diff --git a/drivers/usb/gadget/s3c-hsudc.c b/drivers/usb/gadget/s3c-hsudc.c
index 09ea96558b91..f398b8590f9c 100644
--- a/drivers/usb/gadget/s3c-hsudc.c
+++ b/drivers/usb/gadget/s3c-hsudc.c
@@ -1142,7 +1142,7 @@ static int s3c_hsudc_start(struct usb_gadget_driver *driver,
         int ret;
 
         if (!driver
-                || driver->speed < USB_SPEED_FULL
+                || driver->max_speed < USB_SPEED_FULL
                 || !bind
                 || !driver->unbind || !driver->disconnect || !driver->setup)
                 return -EINVAL;
diff --git a/drivers/usb/gadget/s3c2410_udc.c b/drivers/usb/gadget/s3c2410_udc.c
index b8643771fa80..4d860e9460a4 100644
--- a/drivers/usb/gadget/s3c2410_udc.c
+++ b/drivers/usb/gadget/s3c2410_udc.c
@@ -1683,9 +1683,9 @@ static int s3c2410_udc_start(struct usb_gadget_driver *driver,
         if (udc->driver)
                 return -EBUSY;
 
-        if (!bind || !driver->setup || driver->speed < USB_SPEED_FULL) {
+        if (!bind || !driver->setup || driver->max_speed < USB_SPEED_FULL) {
                 printk(KERN_ERR "Invalid driver: bind %p setup %p speed %d\n",
-                        bind, driver->setup, driver->speed);
+                        bind, driver->setup, driver->max_speed);
                 return -EINVAL;
         }
 #if defined(MODULE)
diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c
index 47a3d1e5b28b..3148461287b1 100644
--- a/drivers/usb/musb/musb_gadget.c
+++ b/drivers/usb/musb/musb_gadget.c
@@ -1903,7 +1903,7 @@ static int musb_gadget_start(struct usb_gadget *g,
         unsigned long           flags;
         int                     retval = -EINVAL;
 
-        if (driver->speed < USB_SPEED_HIGH)
+        if (driver->max_speed < USB_SPEED_HIGH)
                 goto err0;
 
         pm_runtime_get_sync(musb->controller);
diff --git a/drivers/usb/renesas_usbhs/mod_gadget.c b/drivers/usb/renesas_usbhs/mod_gadget.c
index 43c67e5cde26..c307c8f5bd3a 100644
--- a/drivers/usb/renesas_usbhs/mod_gadget.c
+++ b/drivers/usb/renesas_usbhs/mod_gadget.c
@@ -751,7 +751,7 @@ static int usbhsg_gadget_start(struct usb_gadget *gadget,
 
         if (!driver             ||
             !driver->setup      ||
-            driver->speed < USB_SPEED_FULL)
+            driver->max_speed < USB_SPEED_FULL)
                 return -EINVAL;
 
         /* first hook up the driver ... */
diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h
index 98dc306898b5..317d8925387c 100644
--- a/include/linux/usb/gadget.h
+++ b/include/linux/usb/gadget.h
@@ -760,7 +760,7 @@ static inline int usb_gadget_disconnect(struct usb_gadget *gadget)
 /**
  * struct usb_gadget_driver - driver for usb 'slave' devices
  * @function: String describing the gadget's function
- * @speed: Highest speed the driver handles.
+ * @max_speed: Highest speed the driver handles.
  * @setup: Invoked for ep0 control requests that aren't handled by
  *      the hardware level driver. Most calls must be handled by
  *      the gadget driver, including descriptor and configuration
@@ -824,7 +824,7 @@ static inline int usb_gadget_disconnect(struct usb_gadget *gadget)
  */
 struct usb_gadget_driver {
         char                    *function;
-        enum usb_device_speed   speed;
+        enum usb_device_speed   max_speed;
         void                    (*unbind)(struct usb_gadget *);
         int                     (*setup)(struct usb_gadget *,
                                         const struct usb_ctrlrequest *);