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| author | Felix Fietkau <nbd@nbd.name> | 2016-05-19 17:34:38 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-07-27 09:47:27 -0700 |
| commit | 9dcbb4d9fdae96d9320f5c794229a2c7e522cc5f (patch) | |
| tree | a75b8670603412e13c7c69018c4d7784677de79e /net | |
| parent | 35467dc7630af60abacc330f64029d081f160530 (diff) | |
| download | lwn-9dcbb4d9fdae96d9320f5c794229a2c7e522cc5f.tar.gz lwn-9dcbb4d9fdae96d9320f5c794229a2c7e522cc5f.zip | |
mac80211: fix fast_tx header alignment
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 <nbd@nbd.name>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/mac80211/sta_info.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/mac80211/sta_info.h b/net/mac80211/sta_info.h index 2cafb21b422f..15b0150283b6 100644 --- a/net/mac80211/sta_info.h +++ b/net/mac80211/sta_info.h @@ -269,7 +269,7 @@ 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; }; |