wext: Pull ioctl permission checking out into helper function.

	return -EOPNOTSUPP;

}

/* If command is `set a parameter', or `get the encoding parameters',

 * check if the user has the right to do it.

 */

static int wext_permission_check(unsigned int cmd)

{

	if ((IW_IS_SET(cmd) || cmd == SIOCGIWENCODE || cmd == SIOCGIWENCODEEXT)

	    && !capable(CAP_NET_ADMIN))

		return -EPERM;

	return 0;

}

/* entry point from dev ioctl */

int wext_handle_ioctl(struct net *net, struct ifreq *ifr, unsigned int cmd,

		      void __user *arg)

{

	int ret;

	int ret = wext_permission_check(cmd);

	/* If command is `set a parameter', or

	 * `get the encoding parameters', check if

	 * the user has the right to do it */

	if ((IW_IS_SET(cmd) || cmd == SIOCGIWENCODE || cmd == SIOCGIWENCODEEXT)

	    && !capable(CAP_NET_ADMIN))

		return -EPERM;

	if (ret)

		return ret;

	dev_load(net, ifr->ifr_name);

	rtnl_lock();