linux-kernel - [PATCH 1/3] rtlwifi: fix uninitialized rtlhal->last_suspend

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Date:   Mon,  6 Nov 2017 14:55:35 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     Larry Finger <Larry.Finger@...inger.net>,
        Chaoming Li <chaoming_li@...lsil.com.cn>,
        Kalle Valo <kvalo@...eaurora.org>
Cc:     Arnd Bergmann <arnd@...db.de>, stable@...r.kernel.org,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 1/3] rtlwifi: fix uninitialized rtlhal->last_suspend_sec time

We set rtlhal->last_suspend_sec to an uninitialized stack variable,
but unfortunately gcc never warned about this, I only found it
while working on another patch. I opened a gcc bug for this.

Presumably the value of rtlhal->last_suspend_sec is not all that
important, but it does get used, so we probably want the
patch backported to stable kernels.

Cc: stable@...r.kernel.org
Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82839
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/net/wireless/realtek/rtlwifi/rtl8821ae/hw.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/hw.c b/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/hw.c
index 60c82a5b51cd..20ffe856180e 100644
--- a/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/hw.c
+++ b/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/hw.c
@@ -1373,6 +1373,7 @@ static void _rtl8821ae_get_wakeup_reason(struct ieee80211_hw *hw)
 
 	ppsc->wakeup_reason = 0;
 
+	do_gettimeofday(&ts);
 	rtlhal->last_suspend_sec = ts.tv_sec;
 
 	switch (fw_reason) {
-- 
2.9.0