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authorFelix Fietkau <nbd@nbd.name>2018-02-10 15:20:34 +0300
committerJohannes Berg <johannes.berg@intel.com>2018-02-19 15:13:36 +0300
commit651b9920d7a694ffb1f885aef2bbb068a25d9d66 (patch)
treef8ec4100dcb78aaf2345114e3c39c65737702b1a /include/net/mac80211.h
parentce162bfbc0b601841886965baba14877127c7c7c (diff)
downloadlinux-651b9920d7a694ffb1f885aef2bbb068a25d9d66.tar.xz
mac80211: round IEEE80211_TX_STATUS_HEADROOM up to multiple of 4
This ensures that mac80211 allocated management frames are properly aligned, which makes copying them more efficient. For instance, mt76 uses iowrite32_copy to copy beacon frames to beacon template memory on the chip. Misaligned 32-bit accesses cause CPU exceptions on MIPS and should be avoided. Signed-off-by: Felix Fietkau <nbd@nbd.name> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'include/net/mac80211.h')
-rw-r--r--include/net/mac80211.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index eec143cca1c0..c9077a832977 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -4141,7 +4141,7 @@ void ieee80211_sta_uapsd_trigger(struct ieee80211_sta *sta, u8 tid);
* The TX headroom reserved by mac80211 for its own tx_status functions.
* This is enough for the radiotap header.
*/
-#define IEEE80211_TX_STATUS_HEADROOM 14
+#define IEEE80211_TX_STATUS_HEADROOM ALIGN(14, 4)
/**
* ieee80211_sta_set_buffered - inform mac80211 about driver-buffered frames