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| author | Yizhuo <yzhai003@ucr.edu> | 2019-09-29 10:09:57 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-11-10 11:27:15 +0100 |
| commit | bab5c14b5c8909d80a7e322613405451b25b11aa (patch) | |
| tree | e58bf734cb0de904fa528b645b69cd468eb96e1d | |
| parent | 6ef17b446081f41be552991b49c78d980f961a42 (diff) | |
| download | linux-stable-bab5c14b5c8909d80a7e322613405451b25b11aa.tar.gz linux-stable-bab5c14b5c8909d80a7e322613405451b25b11aa.tar.bz2 linux-stable-bab5c14b5c8909d80a7e322613405451b25b11aa.zip | |
regulator: pfuze100-regulator: Variable "val" in pfuze100_regulator_probe() could be uninitialized
[ 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>
| -rw-r--r-- | drivers/regulator/pfuze100-regulator.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/regulator/pfuze100-regulator.c b/drivers/regulator/pfuze100-regulator.c index 31c3a236120a..69a377ab2604 100644 --- a/drivers/regulator/pfuze100-regulator.c +++ b/drivers/regulator/pfuze100-regulator.c @@ -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) { |