Driver Core: usb: add nodename support for usb drivers.
This adds support for USB drivers to report their requested nodename to
userspace. It also updates a number of USB drivers to provide the
needed subdirectory and device name to be used for them.
Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Jan Blunck <jblunck@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/hid/usbhid/hiddev.c b/drivers/hid/usbhid/hiddev.c
index e9b436d..9e94215 100644
--- a/drivers/hid/usbhid/hiddev.c
+++ b/drivers/hid/usbhid/hiddev.c
@@ -850,8 +850,14 @@
#endif
};
+static char *hiddev_nodename(struct device *dev)
+{
+ return kasprintf(GFP_KERNEL, "usb/%s", dev_name(dev));
+}
+
static struct usb_class_driver hiddev_class = {
.name = "hiddev%d",
+ .nodename = hiddev_nodename,
.fops = &hiddev_fops,
.minor_base = HIDDEV_MINOR_BASE,
};
@@ -955,7 +961,6 @@
return -ENODEV;
}
-
static /* const */ struct usb_driver hiddev_driver = {
.name = "hiddev",
.probe = hiddev_usbd_probe,
diff --git a/drivers/media/video/dabusb.c b/drivers/media/video/dabusb.c
index ba3709b..ec2f45d 100644
--- a/drivers/media/video/dabusb.c
+++ b/drivers/media/video/dabusb.c
@@ -747,8 +747,14 @@
.release = dabusb_release,
};
+static char *dabusb_nodename(struct device *dev)
+{
+ return kasprintf(GFP_KERNEL, "usb/%s", dev_name(dev));
+}
+
static struct usb_class_driver dabusb_class = {
.name = "dabusb%d",
+ .nodename = dabusb_nodename,
.fops = &dabusb_fops,
.minor_base = DABUSB_MINOR,
};
diff --git a/drivers/usb/class/usblp.c b/drivers/usb/class/usblp.c
index d2747a4..26c09f0 100644
--- a/drivers/usb/class/usblp.c
+++ b/drivers/usb/class/usblp.c
@@ -1057,8 +1057,14 @@
.release = usblp_release,
};
+static char *usblp_nodename(struct device *dev)
+{
+ return kasprintf(GFP_KERNEL, "usb/%s", dev_name(dev));
+}
+
static struct usb_class_driver usblp_class = {
.name = "lp%d",
+ .nodename = usblp_nodename,
.fops = &usblp_fops,
.minor_base = USBLP_MINOR_BASE,
};
diff --git a/drivers/usb/core/file.c b/drivers/usb/core/file.c
index 997e659..5cef889 100644
--- a/drivers/usb/core/file.c
+++ b/drivers/usb/core/file.c
@@ -67,6 +67,16 @@
struct class *class;
} *usb_class;
+static char *usb_nodename(struct device *dev)
+{
+ struct usb_class_driver *drv;
+
+ drv = dev_get_drvdata(dev);
+ if (!drv || !drv->nodename)
+ return NULL;
+ return drv->nodename(dev);
+}
+
static int init_usb_class(void)
{
int result = 0;
@@ -90,6 +100,7 @@
kfree(usb_class);
usb_class = NULL;
}
+ usb_class->class->nodename = usb_nodename;
exit:
return result;
@@ -198,7 +209,7 @@
else
temp = name;
intf->usb_dev = device_create(usb_class->class, &intf->dev,
- MKDEV(USB_MAJOR, minor), NULL,
+ MKDEV(USB_MAJOR, minor), class_driver,
"%s", temp);
if (IS_ERR(intf->usb_dev)) {
down_write(&minor_rwsem);
diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c
index 7eee400..927a27d 100644
--- a/drivers/usb/core/usb.c
+++ b/drivers/usb/core/usb.c
@@ -305,10 +305,21 @@
#endif /* CONFIG_PM */
+
+static char *usb_nodename(struct device *dev)
+{
+ struct usb_device *usb_dev;
+
+ usb_dev = to_usb_device(dev);
+ return kasprintf(GFP_KERNEL, "bus/usb/%03d/%03d",
+ usb_dev->bus->busnum, usb_dev->devnum);
+}
+
struct device_type usb_device_type = {
.name = "usb_device",
.release = usb_release_dev,
.uevent = usb_dev_uevent,
+ .nodename = usb_nodename,
.pm = &usb_device_pm_ops,
};
diff --git a/drivers/usb/misc/iowarrior.c b/drivers/usb/misc/iowarrior.c
index a4ef77e..3c5fe5c 100644
--- a/drivers/usb/misc/iowarrior.c
+++ b/drivers/usb/misc/iowarrior.c
@@ -726,12 +726,18 @@
.poll = iowarrior_poll,
};
+static char *iowarrior_nodename(struct device *dev)
+{
+ return kasprintf(GFP_KERNEL, "usb/%s", dev_name(dev));
+}
+
/*
* usb class driver info in order to get a minor number from the usb core,
* and to have the device registered with devfs and the driver core
*/
static struct usb_class_driver iowarrior_class = {
.name = "iowarrior%d",
+ .nodename = iowarrior_nodename,
.fops = &iowarrior_fops,
.minor_base = IOWARRIOR_MINOR_BASE,
};
diff --git a/drivers/usb/misc/legousbtower.c b/drivers/usb/misc/legousbtower.c
index ab0f322..c1e2433 100644
--- a/drivers/usb/misc/legousbtower.c
+++ b/drivers/usb/misc/legousbtower.c
@@ -266,12 +266,18 @@
.llseek = tower_llseek,
};
+static char *legousbtower_nodename(struct device *dev)
+{
+ return kasprintf(GFP_KERNEL, "usb/%s", dev_name(dev));
+}
+
/*
* usb class driver info in order to get a minor number from the usb core,
* and to have the device registered with the driver core
*/
static struct usb_class_driver tower_class = {
.name = "legousbtower%d",
+ .nodename = legousbtower_nodename,
.fops = &tower_fops,
.minor_base = LEGO_USB_TOWER_MINOR_BASE,
};
diff --git a/include/linux/usb.h b/include/linux/usb.h
index 3aa2cd1..34cdfca 100644
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -869,6 +869,8 @@
* struct usb_device_driver - identifies USB device driver to usbcore
* @name: The driver name should be unique among USB drivers,
* and should normally be the same as the module name.
+ * @nodename: Callback to provide a naming hint for a possible
+ * device node to create.
* @probe: Called to see if the driver is willing to manage a particular
* device. If it is, probe returns zero and uses dev_set_drvdata()
* to associate driver-specific data with the device. If unwilling
@@ -912,6 +914,7 @@
*/
struct usb_class_driver {
char *name;
+ char *(*nodename)(struct device *dev);
const struct file_operations *fops;
int minor_base;
};
