original_kernel/net/wireless/ethtool.c

#include <linux/utsname.h>
#include <net/cfg80211.h>
#include "ethtool.h"

static void cfg80211_get_drvinfo(struct net_device *dev,
					struct ethtool_drvinfo *info)
{
	struct wireless_dev *wdev = dev->ieee80211_ptr;

	strlcpy(info->driver, wiphy_dev(wdev->wiphy)->driver->name,
		sizeof(info->driver));

	strlcpy(info->version, init_utsname()->release, sizeof(info->version));

	if (wdev->wiphy->fw_version[0])
		strncpy(info->fw_version, wdev->wiphy->fw_version,
			sizeof(info->fw_version));
	else
		strncpy(info->fw_version, "N/A", sizeof(info->fw_version));

	strlcpy(info->bus_info, dev_name(wiphy_dev(wdev->wiphy)),
		sizeof(info->bus_info));
}

static int cfg80211_get_regs_len(struct net_device *dev)
{
	/* For now, return 0... */
	return 0;
}

static void cfg80211_get_regs(struct net_device *dev, struct ethtool_regs *regs,
			void *data)
{
	struct wireless_dev *wdev = dev->ieee80211_ptr;

	regs->version = wdev->wiphy->hw_version;
	regs->len = 0;
}

const struct ethtool_ops cfg80211_ethtool_ops = {
	.get_drvinfo = cfg80211_get_drvinfo,
	.get_regs_len = cfg80211_get_regs_len,
	.get_regs = cfg80211_get_regs,
	.get_link = ethtool_op_get_link,
};