[PATCH 3/3] ath: Enhance radar detection by looking up chirp

[Peter Oh]

Certain radar types such as FCC radar type 5 are using chirp
in their pulses, hence looking up the chirp status will enhance
to avoid false radar detection.

Signed-off-by: Peter Oh <poh at qca.qualcomm.com>
---
 drivers/net/wireless/ath/dfs_pri_detector.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/wireless/ath/dfs_pri_detector.c b/drivers/net/wireless/ath/dfs_pri_detector.c
index 43b6081..1b5ad19 100644
--- a/drivers/net/wireless/ath/dfs_pri_detector.c
+++ b/drivers/net/wireless/ath/dfs_pri_detector.c
@@ -390,6 +390,10 @@ static struct pri_sequence *pri_detector_add_pulse(struct pri_detector *de,
 	if ((ts - de->last_ts) < rs->max_pri_tolerance)
 		/* if delta to last pulse is too short, don't use this pulse */
 		return NULL;
+	/* radar detector spec needs chirp, but not detected */
+	if (rs->chirp && rs->chirp != event->chirp)
+		return NULL;
+
 	de->last_ts = ts;
 
 	max_updated_seq = pseq_handler_add_to_existing_seqs(de, ts);
-- 
1.9.1