linux-kernel - [PATCH] drivers/misc/lis3lv02d/lis3lv02d_i2c.c: Check for error return from regulator_bulk_enable in lis3_i2c

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Message-Id: <20220106065657.2667748-1-jiasheng@iscas.ac.cn>
Date:   Thu,  6 Jan 2022 14:56:57 +0800
From:   Jiasheng Jiang <jiasheng@...as.ac.cn>
To:     eric.piel@...mplin-utc.net, arnd@...db.de,
        gregkh@...uxfoundation.org
Cc:     linux-kernel@...r.kernel.org, Jiasheng Jiang <jiasheng@...as.ac.cn>
Subject: [PATCH] drivers/misc/lis3lv02d/lis3lv02d_i2c.c: Check for error return from regulator_bulk_enable in lis3_i2c_init

Because of the possible failure of the consumer, the
regulator_bulk_enable() may return error.
Therefore, it should be better to check the return value of the
lis3_reg_ctrl().
There are two callers, and I submit two patches to fix separately.
This patch is about lis3_i2c_init().

Fixes: ec400c9fab99 ("lis3lv02d: make regulator API usage unconditional")
Signed-off-by: Jiasheng Jiang <jiasheng@...as.ac.cn>
---
 drivers/misc/lis3lv02d/lis3lv02d_i2c.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/misc/lis3lv02d/lis3lv02d_i2c.c b/drivers/misc/lis3lv02d/lis3lv02d_i2c.c
index 52555d2e824b..4001e3c0a167 100644
--- a/drivers/misc/lis3lv02d/lis3lv02d_i2c.c
+++ b/drivers/misc/lis3lv02d/lis3lv02d_i2c.c
@@ -69,7 +69,9 @@ static int lis3_i2c_init(struct lis3lv02d *lis3)
 	u8 reg;
 	int ret;
 
-	lis3_reg_ctrl(lis3, LIS3_REG_ON);
+	ret = lis3_reg_ctrl(lis3, LIS3_REG_ON);
+	if (ret)
+		return ret;
 
 	lis3->read(lis3, WHO_AM_I, &reg);
 	if (reg != lis3->whoami)
-- 
2.25.1