From d10f2150eab62f633aeae36cf4612d1f648a817e Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Thu, 24 Jan 2008 16:57:39 -0800 Subject: [PATCH] [MAC80211]: Revert unaligned warning removal. For release Linux removed this warning, but we want it back for development. Signed-off-by: David S. Miller --- net/mac80211/rx.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c index 00f908d9275..a7263fc476b 100644 --- a/net/mac80211/rx.c +++ b/net/mac80211/rx.c @@ -1443,6 +1443,7 @@ 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 @@ -1472,6 +1473,18 @@ 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++; -- 2.41.1