linux-kernel - [PATCH 4.9 55/90] batman-adv: Use default throughput value on cfg80211 error

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Message-Id: <20200319123945.376555621@linuxfoundation.org>
Date:   Thu, 19 Mar 2020 14:00:17 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Sven Eckelmann <sven@...fation.org>,
        Marek Lindner <mareklindner@...mailbox.ch>,
        Simon Wunderlich <sw@...onwunderlich.de>
Subject: [PATCH 4.9 55/90] batman-adv: Use default throughput value on cfg80211 error

From: Sven Eckelmann <sven@...fation.org>

commit 3f3f87325dcb3c201076c81490f4da91ad4c09fc upstream.

A wifi interface should never be handled like an ethernet devices. The
parser of the cfg80211 output must therefore skip the ethtool code when
cfg80211_get_station returned an error.

Fixes: f44a3ae9a281 ("batman-adv: refactor wifi interface detection")
Signed-off-by: Sven Eckelmann <sven@...fation.org>
Reviewed-by: Marek Lindner <mareklindner@...mailbox.ch>
Signed-off-by: Simon Wunderlich <sw@...onwunderlich.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 net/batman-adv/bat_v_elp.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

--- a/net/batman-adv/bat_v_elp.c
+++ b/net/batman-adv/bat_v_elp.c
@@ -100,8 +100,10 @@ static u32 batadv_v_elp_get_throughput(s
 				 */
 				return 0;
 			}
-			if (!ret)
-				return sinfo.expected_throughput / 100;
+			if (ret)
+				goto default_throughput;
+
+			return sinfo.expected_throughput / 100;
 		}
 
 		/* unsupported WiFi driver version */