4.6-stable review patch. If anyone has any objections, please let me know.
------------------ From: Felix Fietkau <[email protected]> commit 6fe04128f158c5ad27e7504bfdf1b12e63331bc9 upstream. The header field is defined as u8[] but also accessed as struct ieee80211_hdr. Enforce an alignment of 2 to prevent unnecessary unaligned accesses, which can be very harmful for performance on many platforms. Fixes: e495c24731a2 ("mac80211: extend fast-xmit for more ciphers") Signed-off-by: Felix Fietkau <[email protected]> Signed-off-by: Johannes Berg <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- net/mac80211/sta_info.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/net/mac80211/sta_info.h +++ b/net/mac80211/sta_info.h @@ -275,7 +275,7 @@ struct ieee80211_fast_tx { u8 sa_offs, da_offs, pn_offs; u8 band; u8 hdr[30 + 2 + IEEE80211_FAST_XMIT_MAX_IV + - sizeof(rfc1042_header)]; + sizeof(rfc1042_header)] __aligned(2); struct rcu_head rcu_head; };
