Merge "usb: misc: ks_bridge: Add polling call back"

#include <linux/cdev.h>

#include <linux/list.h>

#include <linux/wait.h>

#include <linux/poll.h>

#define DRIVER_DESC	"USB host ks bridge driver"

#define DRIVER_VERSION	"1.0"

	return 0;

}

static unsigned int ksb_fs_poll(struct file *file, poll_table *wait)

{

	struct ks_bridge	*ksb = file->private_data;

	unsigned long		flags;

	int			ret = 0;

	if (!test_bit(USB_DEV_CONNECTED, &ksb->flags))

		return POLLERR;

	poll_wait(file, &ksb->ks_wait_q, wait);

	if (!test_bit(USB_DEV_CONNECTED, &ksb->flags))

		return POLLERR;

	spin_lock_irqsave(&ksb->lock, flags);

	if (!list_empty(&ksb->to_ks_list))

		ret = POLLIN | POLLRDNORM;

	spin_unlock_irqrestore(&ksb->lock, flags);

	return ret;

}

static int ksb_fs_release(struct inode *ip, struct file *fp)

{

	struct ks_bridge	*ksb = fp->private_data;

	.write = ksb_fs_write,

	.open = ksb_fs_open,

	.release = ksb_fs_release,

	.poll = ksb_fs_poll,

};

static struct ksb_dev_info ksb_fboot_dev[] = {