linux-kernel - [PATCH AUTOSEL 5.4 39/39] virt_wifi: Return micros for BSS TSF values

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Message-Id: <20210412162502.314854-39-sashal@kernel.org>
Date:   Mon, 12 Apr 2021 12:25:01 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     "A. Cody Schuffelen" <schuffelen@...gle.com>,
        Johannes Berg <johannes.berg@...el.com>,
        Sasha Levin <sashal@...nel.org>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org
Subject: [PATCH AUTOSEL 5.4 39/39] virt_wifi: Return micros for BSS TSF values

From: "A. Cody Schuffelen" <schuffelen@...gle.com>

[ Upstream commit b57aa17f07c9270e576ef7df09f142978b5a75f0 ]

cfg80211_inform_bss expects to receive a TSF value, but is given the
time since boot in nanoseconds. TSF values are expected to be at
microsecond scale rather than nanosecond scale.

Signed-off-by: A. Cody Schuffelen <schuffelen@...gle.com>
Link: https://lore.kernel.org/r/20210318200419.1421034-1-schuffelen@google.com
Signed-off-by: Johannes Berg <johannes.berg@...el.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/wireless/virt_wifi.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/virt_wifi.c b/drivers/net/wireless/virt_wifi.c
index 01305ba2d3aa..9d04ca53229b 100644
--- a/drivers/net/wireless/virt_wifi.c
+++ b/drivers/net/wireless/virt_wifi.c
@@ -12,6 +12,7 @@
 #include <net/cfg80211.h>
 #include <net/rtnetlink.h>
 #include <linux/etherdevice.h>
+#include <linux/math64.h>
 #include <linux/module.h>
 
 static struct wiphy *common_wiphy;
@@ -168,11 +169,11 @@ static void virt_wifi_scan_result(struct work_struct *work)
 			     scan_result.work);
 	struct wiphy *wiphy = priv_to_wiphy(priv);
 	struct cfg80211_scan_info scan_info = { .aborted = false };
+	u64 tsf = div_u64(ktime_get_boottime_ns(), 1000);
 
 	informed_bss = cfg80211_inform_bss(wiphy, &channel_5ghz,
 					   CFG80211_BSS_FTYPE_PRESP,
-					   fake_router_bssid,
-					   ktime_get_boottime_ns(),
+					   fake_router_bssid, tsf,
 					   WLAN_CAPABILITY_ESS, 0,
 					   (void *)&ssid, sizeof(ssid),
 					   DBM_TO_MBM(-50), GFP_KERNEL);
-- 
2.30.2