cfg80211: add firmware and hardware version to wiphy

It's useful to provide firmware and hardware version to user space and have a
generic interface to retrieve them. Users can provide the version information
in bug reports etc.

Add fields for firmware and hardware version to struct wiphy.

(Dropped nl80211 bits for now and modified remaining bits in favor of
ethtool. -- JWL)

Cc: Kalle Valo <kalle.valo@nokia.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/wireless/ethtool.c b/net/wireless/ethtool.c
index 80d6d0d..ca4c825 100644
--- a/net/wireless/ethtool.c
+++ b/net/wireless/ethtool.c
@@ -12,13 +12,34 @@
 
 	strlcpy(info->version, init_utsname()->release, sizeof(info->version));
 
-	strlcpy(info->fw_version, "N/A", sizeof(info->fw_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,
 };