const char *usbcore_name = "usbcore";
static int nousb; /* Disable USB when built into kernel image */
- /* Not honored on modular build */
/**
mark_quiesced(iface);
}
+struct find_interface_arg {
+ int minor;
+ struct usb_interface *interface;
+};
+
static int __find_interface(struct device * dev, void * data)
{
- struct usb_interface ** ret = (struct usb_interface **)data;
- struct usb_interface * intf = *ret;
- int *minor = (int *)data;
+ struct find_interface_arg *arg = data;
+ struct usb_interface *intf;
/* can't look at usb devices, only interfaces */
if (dev->driver == &usb_generic_driver)
return 0;
intf = to_usb_interface(dev);
- if (intf->minor != -1 && intf->minor == *minor) {
- *ret = intf;
+ if (intf->minor != -1 && intf->minor == arg->minor) {
+ arg->interface = intf;
return 1;
}
return 0;
*/
struct usb_interface *usb_find_interface(struct usb_driver *drv, int minor)
{
- struct usb_interface *intf = (struct usb_interface *)(long)minor;
- int ret;
+ struct find_interface_arg argb;
- ret = driver_for_each_device(&drv->driver, NULL, &intf, __find_interface);
-
- return ret ? intf : NULL;
+ argb.minor = minor;
+ argb.interface = NULL;
+ driver_for_each_device(&drv->driver, NULL, &argb, __find_interface);
+ return argb.interface;
}
#ifdef CONFIG_HOTPLUG
/*
- * USB hotplugging invokes what /proc/sys/kernel/hotplug says
- * (normally /sbin/hotplug) when USB devices get added or removed.
- *
- * This invokes a user mode policy agent, typically helping to load driver
+ * This sends an uevent to userspace, typically helping to load driver
* or other modules, configure the device, and more. Drivers can provide
* a MODULE_DEVICE_TABLE to help with module loading subtasks.
*
* delays in event delivery. Use sysfs (and DEVPATH) to make sure the
* device (and this configuration!) are still present.
*/
-static int usb_hotplug (struct device *dev, char **envp, int num_envp,
- char *buffer, int buffer_size)
+static int usb_uevent(struct device *dev, char **envp, int num_envp,
+ char *buffer, int buffer_size)
{
struct usb_interface *intf;
struct usb_device *usb_dev;
return -ENODEV;
/* driver is often null here; dev_dbg() would oops */
- pr_debug ("usb %s: hotplug\n", dev->bus_id);
+ pr_debug ("usb %s: uevent\n", dev->bus_id);
/* Must check driver_data here, as on remove driver is always NULL */
if ((dev->driver == &usb_generic_driver) ||
*
* FIXME reduce hardwired intelligence here
*/
- if (add_hotplug_env_var(envp, num_envp, &i,
- buffer, buffer_size, &length,
- "DEVICE=/proc/bus/usb/%03d/%03d",
- usb_dev->bus->busnum, usb_dev->devnum))
+ if (add_uevent_var(envp, num_envp, &i,
+ buffer, buffer_size, &length,
+ "DEVICE=/proc/bus/usb/%03d/%03d",
+ usb_dev->bus->busnum, usb_dev->devnum))
return -ENOMEM;
#endif
/* per-device configurations are common */
- if (add_hotplug_env_var(envp, num_envp, &i,
- buffer, buffer_size, &length,
- "PRODUCT=%x/%x/%x",
- le16_to_cpu(usb_dev->descriptor.idVendor),
- le16_to_cpu(usb_dev->descriptor.idProduct),
- le16_to_cpu(usb_dev->descriptor.bcdDevice)))
+ if (add_uevent_var(envp, num_envp, &i,
+ buffer, buffer_size, &length,
+ "PRODUCT=%x/%x/%x",
+ le16_to_cpu(usb_dev->descriptor.idVendor),
+ le16_to_cpu(usb_dev->descriptor.idProduct),
+ le16_to_cpu(usb_dev->descriptor.bcdDevice)))
return -ENOMEM;
/* class-based driver binding models */
- if (add_hotplug_env_var(envp, num_envp, &i,
- buffer, buffer_size, &length,
- "TYPE=%d/%d/%d",
- usb_dev->descriptor.bDeviceClass,
- usb_dev->descriptor.bDeviceSubClass,
- usb_dev->descriptor.bDeviceProtocol))
+ if (add_uevent_var(envp, num_envp, &i,
+ buffer, buffer_size, &length,
+ "TYPE=%d/%d/%d",
+ usb_dev->descriptor.bDeviceClass,
+ usb_dev->descriptor.bDeviceSubClass,
+ usb_dev->descriptor.bDeviceProtocol))
return -ENOMEM;
- if (add_hotplug_env_var(envp, num_envp, &i,
- buffer, buffer_size, &length,
- "INTERFACE=%d/%d/%d",
- alt->desc.bInterfaceClass,
- alt->desc.bInterfaceSubClass,
- alt->desc.bInterfaceProtocol))
+ if (add_uevent_var(envp, num_envp, &i,
+ buffer, buffer_size, &length,
+ "INTERFACE=%d/%d/%d",
+ alt->desc.bInterfaceClass,
+ alt->desc.bInterfaceSubClass,
+ alt->desc.bInterfaceProtocol))
return -ENOMEM;
- if (add_hotplug_env_var(envp, num_envp, &i,
- buffer, buffer_size, &length,
- "MODALIAS=usb:v%04Xp%04Xd%04Xdc%02Xdsc%02Xdp%02Xic%02Xisc%02Xip%02X",
- le16_to_cpu(usb_dev->descriptor.idVendor),
- le16_to_cpu(usb_dev->descriptor.idProduct),
- le16_to_cpu(usb_dev->descriptor.bcdDevice),
- usb_dev->descriptor.bDeviceClass,
- usb_dev->descriptor.bDeviceSubClass,
- usb_dev->descriptor.bDeviceProtocol,
- alt->desc.bInterfaceClass,
- alt->desc.bInterfaceSubClass,
- alt->desc.bInterfaceProtocol))
+ if (add_uevent_var(envp, num_envp, &i,
+ buffer, buffer_size, &length,
+ "MODALIAS=usb:v%04Xp%04Xd%04Xdc%02Xdsc%02Xdp%02Xic%02Xisc%02Xip%02X",
+ le16_to_cpu(usb_dev->descriptor.idVendor),
+ le16_to_cpu(usb_dev->descriptor.idProduct),
+ le16_to_cpu(usb_dev->descriptor.bcdDevice),
+ usb_dev->descriptor.bDeviceClass,
+ usb_dev->descriptor.bDeviceSubClass,
+ usb_dev->descriptor.bDeviceProtocol,
+ alt->desc.bInterfaceClass,
+ alt->desc.bInterfaceSubClass,
+ alt->desc.bInterfaceProtocol))
return -ENOMEM;
envp[i] = NULL;
#else
-static int usb_hotplug (struct device *dev, char **envp,
+static int usb_uevent(struct device *dev, char **envp,
int num_envp, char *buffer, int buffer_size)
{
return -ENODEV;
/* hub driver sets up TT records */
}
+ dev->portnum = port1;
dev->bus = bus;
dev->parent = parent;
INIT_LIST_HEAD(&dev->filelist);
struct bus_type usb_bus_type = {
.name = "usb",
.match = usb_device_match,
- .hotplug = usb_hotplug,
+ .uevent = usb_uevent,
.suspend = usb_generic_suspend,
.resume = usb_generic_resume,
};
-#ifndef MODULE
-
-static int __init usb_setup_disable(char *str)
-{
- nousb = 1;
- return 1;
-}
-
/* format to disable USB on kernel command line is: nousb */
-__setup("nousb", usb_setup_disable);
-
-#endif
+__module_param_call("", nousb, param_set_bool, param_get_bool, &nousb, 0444);
/*
* for external read access to <nousb>
projects / firefly-linux-kernel-4.4.55.git / blobdiff