linux-kernel - [PATCH v1 4/4] thermal: tegra: fix coverity defect

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Date:   Mon, 5 Nov 2018 17:32:34 +0800
From:   Wei Ni <wni@...dia.com>
To:     <thierry.reding@...il.com>, <daniel.lezcano@...aro.org>,
        <linux-tegra@...r.kernel.org>
CC:     <rui.zhang@...el.com>, <edubezval@...il.com>,
        <linux-kernel@...r.kernel.org>, Wei Ni <wni@...dia.com>
Subject: [PATCH v1 4/4] thermal: tegra: fix coverity defect

Fix dereference dev before null check.

Signed-off-by: Wei Ni <wni@...dia.com>
---
 drivers/thermal/tegra/soctherm.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/thermal/tegra/soctherm.c b/drivers/thermal/tegra/soctherm.c
index 3042837364e8..96527df91f2a 100644
--- a/drivers/thermal/tegra/soctherm.c
+++ b/drivers/thermal/tegra/soctherm.c
@@ -397,7 +397,7 @@ static int throttrip_program(struct device *dev,
 			     struct soctherm_throt_cfg *stc,
 			     int trip_temp)
 {
-	struct tegra_soctherm *ts = dev_get_drvdata(dev);
+	struct tegra_soctherm *ts;
 	int temp, cpu_throt, gpu_throt;
 	unsigned int throt;
 	u32 r, reg_off;
@@ -405,6 +405,8 @@ static int throttrip_program(struct device *dev,
 	if (!sg || !stc || !stc->init)
 		return -EINVAL;
 
+	ts = dev_get_drvdata(dev);
+
 	temp = enforce_temp_range(dev, trip_temp) / ts->soc->thresh_grain;
 
 	/* Hardcode LIGHT on LEVEL1 and HEAVY on LEVEL2 */
-- 
2.7.4