linux-kernel - [PATCH 1/1] mfd: intel_soc_pmic_core: fix unchecked return value

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Date:   Sun, 23 Apr 2017 20:29:24 +0800
From:   Pan Bian <bianpan201602@....com>
To:     Lee Jones <lee.jones@...aro.org>
Cc:     linux-kernel@...r.kernel.org, Pan Bian <bianpan2016@....com>
Subject: [PATCH 1/1] mfd: intel_soc_pmic_core: fix unchecked return value

From: Pan Bian <bianpan2016@....com>

unction devm_regmap_init_i2c() returns an ERR_PTR on errors, and its
return value should be checked before it is dereferenced. However, in
function intel_soc_pmic_i2c_probe(), the return value of function
devm_regmap_init_i2c() is used without validation. This patch fixes it.

Signed-off-by: Pan Bian <bianpan2016@....com>
---
 drivers/mfd/intel_soc_pmic_core.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/mfd/intel_soc_pmic_core.c b/drivers/mfd/intel_soc_pmic_core.c
index 12d6ebb4..0498854 100644
--- a/drivers/mfd/intel_soc_pmic_core.c
+++ b/drivers/mfd/intel_soc_pmic_core.c
@@ -83,6 +83,8 @@ static int intel_soc_pmic_i2c_probe(struct i2c_client *i2c,
 	dev_set_drvdata(dev, pmic);
 
 	pmic->regmap = devm_regmap_init_i2c(i2c, config->regmap_config);
+	if (IS_ERR(pmic->regmap))
+		return PTR_ERR(pmic->regmap);
 
 	/*
 	 * On some boards the PMIC interrupt may come from a GPIO line. Try to
-- 
1.9.1