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| author | Felix Fietkau <nbd@nbd.name> | 2016-05-19 17:35:49 +0200 |
|---|---|---|
| committer | Felix Fietkau <nbd@nbd.name> | 2016-05-19 17:55:54 +0200 |
| commit | 24270e9493e0832c4976c7001e527f4a2b9b761e (patch) | |
| tree | 65b9af10def2605de8ef81fafdc56feb35eb5023 | |
| parent | 3bc90f9626eee251a0d19d60044d0d544e2f3316 (diff) | |
| download | mtk-20170518-24270e9493e0832c4976c7001e527f4a2b9b761e.zip mtk-20170518-24270e9493e0832c4976c7001e527f4a2b9b761e.tar.gz mtk-20170518-24270e9493e0832c4976c7001e527f4a2b9b761e.tar.bz2 | |
mac80211: fix unaligned accesses in the tx path
Signed-off-by: Felix Fietkau <nbd@nbd.name>
| -rw-r--r-- | package/kernel/mac80211/patches/304-mac80211-fix-fast_tx-header-alignment.patch | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/304-mac80211-fix-fast_tx-header-alignment.patch b/package/kernel/mac80211/patches/304-mac80211-fix-fast_tx-header-alignment.patch new file mode 100644 index 0000000..6316d81 --- /dev/null +++ b/package/kernel/mac80211/patches/304-mac80211-fix-fast_tx-header-alignment.patch @@ -0,0 +1,25 @@ +From: Felix Fietkau <nbd@nbd.name> +Date: Thu, 19 May 2016 17:32:13 +0200 +Subject: [PATCH] mac80211: fix fast_tx header alignment + +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") +Cc: stable@vger.kernel.org +Signed-off-by: Felix Fietkau <nbd@nbd.name> +--- + +--- a/net/mac80211/sta_info.h ++++ b/net/mac80211/sta_info.h +@@ -280,7 +280,7 @@ 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; + }; |