linux-kernel - [PATCH AUTOSEL 4.19 18/64] batman-adv: release station info tidstats

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Message-Id: <20190228151105.11277-18-sashal@kernel.org>
Date:   Thu, 28 Feb 2019 10:10:19 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Felix Fietkau <nbd@....name>, Sven Eckelmann <sven@...fation.org>,
        Simon Wunderlich <sw@...onwunderlich.de>,
        Sasha Levin <sashal@...nel.org>, netdev@...r.kernel.org
Subject: [PATCH AUTOSEL 4.19 18/64] batman-adv: release station info tidstats

From: Felix Fietkau <nbd@....name>

[ Upstream commit 7d652669b61d702c6e62a39579d17f6881670ab6 ]

With the addition of TXQ stats in the per-tid statistics the struct
station_info grew significantly. This resulted in stack size warnings
due to the structure itself being above the limit for the warnings.

To work around this, the TID array was allocated dynamically. Also a
function to free this content was introduced with commit 7ea3e110f2f8
("cfg80211: release station info tidstats where needed") but the necessary
changes were not provided for batman-adv's B.A.T.M.A.N. V implementation.

Signed-off-by: Felix Fietkau <nbd@....name>
Fixes: 8689c051a201 ("cfg80211: dynamically allocate per-tid stats for station info")
[sven@...fation.org: add commit message]
Signed-off-by: Sven Eckelmann <sven@...fation.org>
Signed-off-by: Simon Wunderlich <sw@...onwunderlich.de>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 net/batman-adv/bat_v_elp.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/batman-adv/bat_v_elp.c b/net/batman-adv/bat_v_elp.c
index e8090f099eb80..ef0dec20c7d87 100644
--- a/net/batman-adv/bat_v_elp.c
+++ b/net/batman-adv/bat_v_elp.c
@@ -104,6 +104,9 @@ static u32 batadv_v_elp_get_throughput(struct batadv_hardif_neigh_node *neigh)
 
 		ret = cfg80211_get_station(real_netdev, neigh->addr, &sinfo);
 
+		/* free the TID stats immediately */
+		cfg80211_sinfo_release_content(&sinfo);
+
 		dev_put(real_netdev);
 		if (ret == -ENOENT) {
 			/* Node is not associated anymore! It would be
-- 
2.19.1