cfg80211: constify more pointers in the cfg80211 API

This also propagates through the drivers.

The orinoco driver uses the cfg80211 API structs for internal
bookkeeping, and so needs a (void *) cast that removes the
const - but that's OK because it allocates those pointers.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/net/wireless/ibss.c b/net/wireless/ibss.c
index 6b50588..8f345da 100644
--- a/net/wireless/ibss.c
+++ b/net/wireless/ibss.c
@@ -420,8 +420,8 @@
 	if (len > 0 && ssid[len - 1] == '\0')
 		len--;
 
+	memcpy(wdev->ssid, ssid, len);
 	wdev->wext.ibss.ssid = wdev->ssid;
-	memcpy(wdev->wext.ibss.ssid, ssid, len);
 	wdev->wext.ibss.ssid_len = len;
 
 	wdev_lock(wdev);
diff --git a/net/wireless/sme.c b/net/wireless/sme.c
index 4bc21a2..ea701bb 100644
--- a/net/wireless/sme.c
+++ b/net/wireless/sme.c
@@ -879,7 +879,7 @@
 }
 
 void cfg80211_disconnected(struct net_device *dev, u16 reason,
-			   u8 *ie, size_t ie_len, gfp_t gfp)
+			   const u8 *ie, size_t ie_len, gfp_t gfp)
 {
 	struct wireless_dev *wdev = dev->ieee80211_ptr;
 	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
diff --git a/net/wireless/util.c b/net/wireless/util.c
index 8c61d5c..fa61ac9 100644
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -476,7 +476,8 @@
 EXPORT_SYMBOL(ieee80211_data_to_8023);
 
 int ieee80211_data_from_8023(struct sk_buff *skb, const u8 *addr,
-			     enum nl80211_iftype iftype, u8 *bssid, bool qos)
+			     enum nl80211_iftype iftype,
+			     const u8 *bssid, bool qos)
 {
 	struct ieee80211_hdr hdr;
 	u16 hdrlen, ethertype;