From:   Jouni Malinen <j@w1.fi>
To:     Johannes Berg <johannes@sipsolutions.net>
Cc:     linux-wireless@vger.kernel.org, Jouni Malinen <j@w1.fi>
Subject: [PATCH] mac80211_hwsim: Support boottime in scan results
Date:   Sat,  2 Feb 2019 01:16:31 +0200
Message-Id: <1549062991-28148-1-git-send-email-j@w1.fi>
Sender: linux-wireless-owner@vger.kernel.org
Precedence: bulk

This makes the age information for cfg80211 scan results more accurate
and fixes issues with wpa_supplicant dropping "old" scan results (e.g.,
"wlan0: Own scan request started a scan in 0.000456 seconds") that
looked like would have been received before a scan started due to the
inaccuracy of the default timing mechanism for calculating the BSS entry
age. This makes hwsim test cases significantly more robust to run.

Signed-off-by: Jouni Malinen <j@w1.fi>
---
 drivers/net/wireless/mac80211_hwsim.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/mac80211_hwsim.c b/drivers/net/wireless/mac80211_hwsim.c
index 320edca..87be2b1 100644
--- a/drivers/net/wireless/mac80211_hwsim.c
+++ b/drivers/net/wireless/mac80211_hwsim.c
@@ -1273,10 +1273,12 @@ static bool mac80211_hwsim_tx_frame_no_nl(struct ieee80211_hw *hw,
 	 * probably doesn't really matter.
 	 */
 	if (ieee80211_is_beacon(hdr->frame_control) ||
-	    ieee80211_is_probe_resp(hdr->frame_control))
+	    ieee80211_is_probe_resp(hdr->frame_control)) {
+		rx_status.boottime_ns = ktime_get_boot_ns();
 		now = data->abs_bcn_ts;
-	else
+	} else {
 		now = mac80211_hwsim_get_tsf_raw();
+	}
 
 	/* Copy skb to all enabled radios that are on the current frequency */
 	spin_lock(&hwsim_radio_lock);
-- 
2.7.4