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authorCrt Mori <cmo@melexis.com>2016-09-05 12:14:48 +0300
committerJonathan Cameron <jic23@kernel.org>2016-09-05 23:08:40 +0300
commit67516074884b4bde71ca8ca4724544669935cc5d (patch)
treee23f0da0bab62ab9cbcf7e828ee2ae0e77529ec2 /drivers/iio
parent70e483487db787b152da756d4be0fef917378142 (diff)
downloadlinux-67516074884b4bde71ca8ca4724544669935cc5d.tar.xz
iio: fetch and enable regulators unconditionally
This patch is inspired by a comment of Jonathan Cameron on patch of Linus Walleij commit aeb55fff3891834e07a3144159a7298a19696af8 ("iio: st_sensors: fetch and enable regulators unconditionally"). The explanation for this change is same as in that patch: "Supplies are *not* optional (optional means that the supply is optional in the electrical sense, not the software sense) so we need to get the and enable them at all times. If the device tree or board file does not define suitable regulators for the component, it will be substituted by a dummy regulator, or, if regulators are disabled altogether, by stubs. There is no need to use the IS_ERR_OR_NULL() check that is considered harmful. Reported-by: Linus Wallerij <linus.walleij@linaro.org> Suggested-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Crt Mori <cmo@melexis.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio')
-rw-r--r--drivers/iio/pressure/ms5611_core.c6
1 files changed, 2 insertions, 4 deletions
diff --git a/drivers/iio/pressure/ms5611_core.c b/drivers/iio/pressure/ms5611_core.c
index feb41f82c64a..a74ed1f0c880 100644
--- a/drivers/iio/pressure/ms5611_core.c
+++ b/drivers/iio/pressure/ms5611_core.c
@@ -416,8 +416,7 @@ static int ms5611_init(struct iio_dev *indio_dev)
return 0;
err_regulator_disable:
- if (!IS_ERR_OR_NULL(st->vdd))
- regulator_disable(st->vdd);
+ regulator_disable(st->vdd);
return ret;
}
@@ -425,8 +424,7 @@ static void ms5611_fini(const struct iio_dev *indio_dev)
{
const struct ms5611_state *st = iio_priv(indio_dev);
- if (!IS_ERR_OR_NULL(st->vdd))
- regulator_disable(st->vdd);
+ regulator_disable(st->vdd);
}
int ms5611_probe(struct iio_dev *indio_dev, struct device *dev,