[PATCH 3.16 010/148] ath9k_hw: fix uninitialized variable data

Ben Hutchings
2020-02-08T18:29:38Z

From: Denis Efremov <efremov@linux.com>

commit 80e84f36412e0c5172447b6947068dca0d04ee82 upstream.

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@qca.qualcomm.com>
Cc: John W. Linville <linville@tuxdriver.com>
Cc: Kalle Valo <kvalo@codeaurora.org>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Denis Efremov <efremov@linux.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
drivers/net/wireless/ath/ath9k/ar9003_eeprom.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c
+++ b/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c
@@ -4107,7 +4107,7 @@ static void ar9003_hw_thermometer_apply(

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;