Exemplo n.º 1
0
static int __driver_attach(struct device *dev, void *data)
{
	struct device_driver *drv = data;

	/*
	 * Lock device and try to bind to it. We drop the error
	 * here and always return 0, because we need to keep trying
	 * to bind to devices and some drivers will return an error
	 * simply if it didn't support the device.
	 *
	 * driver_probe_device() will spit a warning if there
	 * is an error.
	 */

	if (drv->bus->match && !drv->bus->match(dev, drv))
		return 0;

	if (dev->parent)	/* Needed for USB */
		down(&dev->parent->sem);
	down(&dev->sem);
	if (!dev->driver)
		driver_probe_device(drv, dev);
	up(&dev->sem);
	if (dev->parent)
		up(&dev->parent->sem);

	return 0;
}
Exemplo n.º 2
0
/*
 * Manually attach a device to a driver.
 * Note: the driver must want to bind to the device,
 * it is not possible to override the driver's id table.
 */
static ssize_t driver_bind(struct device_driver *drv,
			   const char *buf, size_t count)
{
	struct bus_type *bus = bus_get(drv->bus);
	struct device *dev;
	int err = -ENODEV;

	dev = bus_find_device_by_name(bus, NULL, buf);
	if (dev && dev->driver == NULL && driver_match_device(drv, dev)) {
		if (dev->parent)	/* Needed for USB */
			down(&dev->parent->sem);
		down(&dev->sem);
		err = driver_probe_device(drv, dev);
		up(&dev->sem);
		if (dev->parent)
			up(&dev->parent->sem);

		if (err > 0) {
			/* success */
			err = count;
		} else if (err == 0) {
			/* driver didn't accept device */
			err = -ENODEV;
		}
	}
	put_device(dev);
	bus_put(bus);
	return err;
}
Exemplo n.º 3
0
static ssize_t driver_bind(struct device_driver *drv,
			   const char *buf, size_t count)
{
	struct bus_type *bus = bus_get(drv->bus);
	struct device *dev;
	int err = -ENODEV;

	dev = bus_find_device_by_name(bus, NULL, buf);
	if (dev && dev->driver == NULL && driver_match_device(drv, dev)) {
		if (dev->parent)	
			device_lock(dev->parent);
		device_lock(dev);
		err = driver_probe_device(drv, dev);
		device_unlock(dev);
		if (dev->parent)
			device_unlock(dev->parent);

		if (err > 0) {
			
			err = count;
		} else if (err == 0) {
			
			err = -ENODEV;
		}
	}
	put_device(dev);
	bus_put(bus);
	return err;
}
Exemplo n.º 4
0
/*
 * Manually attach a device to a driver.
 * Note: the driver must want to bind to the device,
 * it is not possible to override the driver's id table.
 */
static ssize_t driver_bind(struct device_driver *drv,
			   const char *buf, size_t count)
{
	struct bus_type *bus = get_bus(drv->bus);
	struct device *dev;
	int err = -ENODEV;

	dev = bus_find_device(bus, NULL, (void *)buf, driver_helper);
	if (dev && dev->driver == NULL) {
		if (dev->parent)	/* Needed for USB */
			down(&dev->parent->sem);
		down(&dev->sem);
		err = driver_probe_device(drv, dev);
		up(&dev->sem);
		if (dev->parent)
			up(&dev->parent->sem);

		if (err > 0) 		/* success */
			err = count;
		else if (err == 0)	/* driver didn't accept device */
			err = -ENODEV;
	}
	put_device(dev);
	put_bus(bus);
	return err;
}
Exemplo n.º 5
0
static int __device_attach(struct device_driver *drv, void *data)
{
	struct device *dev = data;

	if (!driver_match_device(drv, dev))
		return 0;

	return driver_probe_device(drv, dev);
}
Exemplo n.º 6
0
/* 将驱动绑定到设备 */
static int __device_attach(struct device_driver *drv, void *data)
{
	struct device *dev = data;

	if (!driver_match_device(drv, dev))  /*  driver_match_device用来判断drv和dev是否匹配,该函数返回1则表明匹配
	                                                                 成功,不成功返回0*/
		return 0;

	return driver_probe_device(drv, dev);  /* 如果driver_match_device匹配成功,那么调用该函数将drv和dev进行绑定 */
}
Exemplo n.º 7
0
/*
 * Manually attach a device to a driver.
 * Note: the driver must want to bind to the device,
 * it is not possible to override the driver's id table.
 */
static ssize_t driver_bind(struct device_driver *drv,
			   const char *buf, size_t count)
{
	struct bus_type *bus = get_bus(drv->bus);
	struct device *dev;
	int err = -ENODEV;

	dev = bus_find_device(bus, NULL, (void *)buf, driver_helper);
	if (dev && dev->driver == NULL) {
		down(&dev->sem);
		err = driver_probe_device(drv, dev);
		up(&dev->sem);
	}
	put_device(dev);
	put_bus(bus);
	return err;
}