Revert "mac80211: warn when receiving frames with unaligned data"

This reverts commit 81100eb80add328c4d2a377326f15aa0e7236398 for the
release, to avoid the unnecessary warning noise that is only really
relevant to wireless driver developers.

The warning will probably go right back in after I cut the release, but
at least we won't unnecessarily worry users.

Acked-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

net/mac80211/rx.c

@@ -1443,7 +1443,6 @@ void __ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb,
 	struct ieee80211_sub_if_data *prev = NULL;
 	struct sk_buff *skb_new;
 	u8 *bssid;
-	int hdrlen;
 
 	/*
 	 * key references and virtual interfaces are protected using RCU
@@ -1473,18 +1472,6 @@ void __ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb,
 	rx.fc = le16_to_cpu(hdr->frame_control);
 	type = rx.fc & IEEE80211_FCTL_FTYPE;
 
-	/*
-	 * Drivers are required to align the payload data to a four-byte
-	 * boundary, so the last two bits of the address where it starts
-	 * may not be set. The header is required to be directly before
-	 * the payload data, padding like atheros hardware adds which is
-	 * inbetween the 802.11 header and the payload is not supported,
-	 * the driver is required to move the 802.11 header further back
-	 * in that case.
-	 */
-	hdrlen = ieee80211_get_hdrlen(rx.fc);
-	WARN_ON_ONCE(((unsigned long)(skb->data + hdrlen)) & 3);
-
 	if (type == IEEE80211_FTYPE_DATA || type == IEEE80211_FTYPE_MGMT)
 		local->dot11ReceivedFragmentCount++;