[PATCH 1/2] mac80211: add rx status flag for short preamble

[Bruno Randolf <br1@einfach.org>]

and use it for the radiotap header

Signed-off-by: Bruno Randolf <br1@einfach.org>
---

 include/net/mac80211.h |    2 ++
 net/mac80211/rx.c      |    2 ++
 2 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 656442c..8e9e0c8 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -355,6 +355,7 @@ static inline struct ieee80211_tx_info *IEEE80211_SKB_CB(struct sk_buff *skb)
  * @RX_FLAG_TSFT: The timestamp passed in the RX status (@mactime field)
  *	is valid. This is useful in monitor mode and necessary for beacon frames
  *	to enable IBSS merging.
+ * @RX_FLAG_SHORTPRE: Short preamble was used for this frame
  */
 enum mac80211_rx_flags {
 	RX_FLAG_MMIC_ERROR	= 1<<0,
@@ -365,6 +366,7 @@ enum mac80211_rx_flags {
 	RX_FLAG_FAILED_FCS_CRC	= 1<<5,
 	RX_FLAG_FAILED_PLCP_CRC = 1<<6,
 	RX_FLAG_TSFT		= 1<<7,
+	RX_FLAG_SHORTPRE	= 1<<8
 };
 
 /**
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index fab443d..5131ee2 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -143,6 +143,8 @@ ieee80211_add_rx_radiotap_header(struct ieee80211_local *local,
 	/* IEEE80211_RADIOTAP_FLAGS */
 	if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS)
 		*pos |= IEEE80211_RADIOTAP_F_FCS;
+	if (status->flag & RX_FLAG_SHORTPRE)
+		*pos |= IEEE80211_RADIOTAP_F_SHORTPRE;
 	pos++;
 
 	/* IEEE80211_RADIOTAP_RATE */