25 lines
796 B
Diff
25 lines
796 B
Diff
From: Felix Fietkau <nbd@nbd.name>
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Date: Thu, 19 May 2016 17:32:13 +0200
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Subject: [PATCH] mac80211: fix fast_tx header alignment
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The header field is defined as u8[] but also accessed as struct
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ieee80211_hdr. Enforce an alignment of 2 to prevent unnecessary
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unaligned accesses, which can be very harmful for performance on many
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platforms.
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Fixes: e495c24731a2 ("mac80211: extend fast-xmit for more ciphers")
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Cc: stable@vger.kernel.org
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Signed-off-by: Felix Fietkau <nbd@nbd.name>
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---
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--- a/net/mac80211/sta_info.h
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+++ b/net/mac80211/sta_info.h
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@@ -280,7 +280,7 @@ struct ieee80211_fast_tx {
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u8 sa_offs, da_offs, pn_offs;
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u8 band;
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u8 hdr[30 + 2 + IEEE80211_FAST_XMIT_MAX_IV +
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- sizeof(rfc1042_header)];
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+ sizeof(rfc1042_header)] __aligned(2);
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struct rcu_head rcu_head;
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};
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