netdev - [PATCH] mac80211: remove set but not used variable 'old'

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Message-ID: <20190429140754.76537-1-yuehaibing@huawei.com>
Date:   Mon, 29 Apr 2019 14:07:54 +0000
From:   YueHaibing <yuehaibing@...wei.com>
To:     Johannes Berg <johannes@...solutions.net>,
        <alexander@...zel-home.de>
CC:     YueHaibing <yuehaibing@...wei.com>,
        <linux-wireless@...r.kernel.org>,
        <kernel-janitors@...r.kernel.org>, <netdev@...r.kernel.org>
Subject: [PATCH] mac80211: remove set but not used variable 'old'

Fixes gcc '-Wunused-but-set-variable' warning:

net/mac80211/key.c: In function 'ieee80211_set_tx_key':
net/mac80211/key.c:271:24: warning:
 variable 'old' set but not used [-Wunused-but-set-variable]

It is not used since introduction in
commit 96fc6efb9ad9 ("mac80211: IEEE 802.11 Extended Key ID support")

Signed-off-by: YueHaibing <yuehaibing@...wei.com>
---
 net/mac80211/key.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/net/mac80211/key.c b/net/mac80211/key.c
index 20bf9db7a388..89f09a09efdb 100644
--- a/net/mac80211/key.c
+++ b/net/mac80211/key.c
@@ -268,11 +268,9 @@ int ieee80211_set_tx_key(struct ieee80211_key *key)
 {
 	struct sta_info *sta = key->sta;
 	struct ieee80211_local *local = key->local;
-	struct ieee80211_key *old;
 
 	assert_key_lock(local);
 
-	old = key_mtx_dereference(local, sta->ptk[sta->ptk_idx]);
 	sta->ptk_idx = key->conf.keyidx;
 	ieee80211_check_fast_xmit(sta);