linux-kernel - [PATCH v1] regulator: pfuze100: add condition check for 'ramp

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Message-Id: <1592920870-12693-1-git-send-email-yibin.gong@nxp.com>
Date:   Tue, 23 Jun 2020 22:01:10 +0800
From:   Robin Gong <yibin.gong@....com>
To:     lgirdwood@...il.com, broonie@...nel.org
Cc:     linux-kernel@...r.kernel.org, linux-imx@....com
Subject: [PATCH v1] regulator: pfuze100: add condition check for 'ramp_delay = 0'

Checking for 'ramp_delay = 0' to avoid Coverity warning report.

Signed-off-by: Robin Gong <yibin.gong@....com>
---
 drivers/regulator/pfuze100-regulator.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/regulator/pfuze100-regulator.c b/drivers/regulator/pfuze100-regulator.c
index 6895379..e75e61f 100644
--- a/drivers/regulator/pfuze100-regulator.c
+++ b/drivers/regulator/pfuze100-regulator.c
@@ -128,7 +128,7 @@ static int pfuze100_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
 	struct pfuze_chip *pfuze100 = rdev_get_drvdata(rdev);
 	int id = rdev_get_id(rdev);
 	bool reg_has_ramp_delay;
-	unsigned int ramp_bits;
+	unsigned int ramp_bits = 0;
 	int ret;
 
 	switch (pfuze100->chip_id) {
@@ -149,8 +149,11 @@ static int pfuze100_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
 	}
 
 	if (reg_has_ramp_delay) {
-		ramp_delay = 12500 / ramp_delay;
-		ramp_bits = (ramp_delay >> 1) - (ramp_delay >> 3);
+		if (ramp_delay > 0) {
+			ramp_delay = 12500 / ramp_delay;
+			ramp_bits = (ramp_delay >> 1) - (ramp_delay >> 3);
+		}
+
 		ret = regmap_update_bits(pfuze100->regmap,
 					 rdev->desc->vsel_reg + 4,
 					 0xc0, ramp_bits << 6);
-- 
2.7.4