Messages in this thread Patch in this message | | | From | Sasha Levin <> | Subject | [PATCH AUTOSEL 4.9 02/18] regulator: pfuze100-regulator: Variable "val" in pfuze100_regulator_probe() could be uninitialized | Date | Wed, 30 Oct 2019 11:56:44 -0400 |
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From: Yizhuo <yzhai003@ucr.edu>
[ Upstream commit 1252b283141f03c3dffd139292c862cae10e174d ]
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> --- drivers/regulator/pfuze100-regulator.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/regulator/pfuze100-regulator.c b/drivers/regulator/pfuze100-regulator.c index 86b348740fcdc..ffb1f61d2c752 100644 --- a/drivers/regulator/pfuze100-regulator.c +++ b/drivers/regulator/pfuze100-regulator.c @@ -608,7 +608,13 @@ 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) { desc->volt_table = pfuze3000_sw2hi; -- 2.20.1
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