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regulator: pfuze100-regulator: Variable "val" in pfuze100_regulator_probe() could be uninitialized

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[ Upstream commit 1252b28314 ]

In function pfuze100_regulator_probe(), variable "val" could be
initialized if regmap_read() fails. However, "val" is used to
decide the control flow later in the if statement, which is
potentially unsafe.

Signed-off-by: Yizhuo <yzhai003@ucr.edu>
Link: https://lore.kernel.org/r/20190929170957.14775-1-yzhai003@ucr.edu
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Yizhuo 2019-09-29 10:09:57 -07:00 committed by Greg Kroah-Hartman
parent 6ef17b4460
commit bab5c14b5c
1 changed files with 7 additions and 1 deletions
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8
drivers/regulator/pfuze100-regulator.c
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@ -710,7 +710,13 @@ static int pfuze100_regulator_probe(struct i2c_client *client,
/* SW2~SW4 high bit check and modify the voltage value table */
if (i >= sw_check_start && i <= sw_check_end) {
regmap_read(pfuze_chip->regmap, desc->vsel_reg, &val);
ret = regmap_read(pfuze_chip->regmap,
desc->vsel_reg, &val);
if (ret) {
dev_err(&client->dev, "Fails to read from the register.\n");
return ret;
}
if (val & sw_hi) {
if (pfuze_chip->chip_id == PFUZE3000 ||
pfuze_chip->chip_id == PFUZE3001) {