netdev - [PATCH] ath9k_hw: fix uninitialized variable data

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Message-Id: <20190926225604.9342-1-efremov@linux.com>
Date:   Fri, 27 Sep 2019 01:56:04 +0300
From:   Denis Efremov <efremov@...ux.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Denis Efremov <efremov@...ux.com>, ath9k-devel@....qualcomm.com,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Rajkumar Manoharan <rmanohar@....qualcomm.com>,
        "John W . Linville" <linville@...driver.com>,
        Kalle Valo <kvalo@...eaurora.org>,
        "David S. Miller" <davem@...emloft.net>, stable@...r.kernel.org
Subject: [PATCH] ath9k_hw: fix uninitialized variable data

Currently, data variable in ar9003_hw_thermo_cal_apply() could be
uninitialized if ar9300_otp_read_word() will fail to read the value.
Initialize data variable with 0 to prevent an undefined behavior. This
will be enough to handle error case when ar9300_otp_read_word() fails.

Fixes: 80fe43f2bbd5 ("ath9k_hw: Read and configure thermocal for AR9462")
Cc: Rajkumar Manoharan <rmanohar@....qualcomm.com>
Cc: John W. Linville <linville@...driver.com>
Cc: Kalle Valo <kvalo@...eaurora.org>
Cc: "David S. Miller" <davem@...emloft.net>
Cc: stable@...r.kernel.org
Signed-off-by: Denis Efremov <efremov@...ux.com>
---
 drivers/net/wireless/ath/ath9k/ar9003_eeprom.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c b/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c
index 2b29bf4730f6..b4885a700296 100644
--- a/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c
+++ b/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c
@@ -4183,7 +4183,7 @@ static void ar9003_hw_thermometer_apply(struct ath_hw *ah)
 
 static void ar9003_hw_thermo_cal_apply(struct ath_hw *ah)
 {
-	u32 data, ko, kg;
+	u32 data = 0, ko, kg;
 
 	if (!AR_SREV_9462_20_OR_LATER(ah))
 		return;
-- 
2.21.0