4.4-stable review patch. If anyone has any objections, please let me know.
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From: Felix Fietkau nbd@nbd.name
[ Upstream commit 651b9920d7a694ffb1f885aef2bbb068a25d9d66 ]
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 Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- include/net/mac80211.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -3898,7 +3898,7 @@ static inline int ieee80211_sta_ps_trans * 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