linux-kernel - [PATCH] wireless: carl9170: fix clang build warning

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Date:   Mon, 25 Mar 2019 13:43:44 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     Christian Lamparter <chunkeey@...glemail.com>,
        Kalle Valo <kvalo@...eaurora.org>,
        "David S. Miller" <davem@...emloft.net>
Cc:     clang-built-linux@...glegroups.com,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Nathan Chancellor <natechancellor@...il.com>,
        Arnd Bergmann <arnd@...db.de>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] wireless: carl9170: fix clang build warning

clang fails to eliminate some dead code with always-taken branches
when CONFIG_PROFILE_ANNOTATED_BRANCHES is set, leading to a false-positive
warning:

drivers/net/wireless/ath/carl9170/mac.c:522:3: error: variable 'power' is used uninitialized whenever 'if' condition is
      false [-Werror,-Wsometimes-uninitialized]
                BUG_ON(1);
                ^~~~~~~~~

Change both instances of BUG_ON(1) in carl9170 to the simpler BUG()
to avoid the warning.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/net/wireless/ath/carl9170/mac.c | 2 +-
 drivers/net/wireless/ath/carl9170/rx.c  | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/ath/carl9170/mac.c b/drivers/net/wireless/ath/carl9170/mac.c
index 7d4a72dc98db..b2eeb9fd68d2 100644
--- a/drivers/net/wireless/ath/carl9170/mac.c
+++ b/drivers/net/wireless/ath/carl9170/mac.c
@@ -519,7 +519,7 @@ int carl9170_set_mac_tpc(struct ar9170 *ar, struct ieee80211_channel *channel)
 		power = ar->power_5G_leg[0] & 0x3f;
 		break;
 	default:
-		BUG_ON(1);
+		BUG();
 	}
 
 	power = min_t(unsigned int, power, ar->hw->conf.power_level * 2);
diff --git a/drivers/net/wireless/ath/carl9170/rx.c b/drivers/net/wireless/ath/carl9170/rx.c
index 8e154f6364a3..23ab8a80c18c 100644
--- a/drivers/net/wireless/ath/carl9170/rx.c
+++ b/drivers/net/wireless/ath/carl9170/rx.c
@@ -795,7 +795,7 @@ static void carl9170_rx_untie_data(struct ar9170 *ar, u8 *buf, int len)
 		break;
 
 	default:
-		BUG_ON(1);
+		BUG();
 		break;
 	}
 
-- 
2.20.0