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| author | Dan Carpenter <dan.carpenter@oracle.com> | 2014-04-30 23:05:00 +0200 |
|---|---|---|
| committer | Jonathan Cameron <jic23@kernel.org> | 2014-05-03 12:14:01 +0200 |
| commit | 82a5803c782417754bdebb8dfa34edc62c0d8bbc (patch) | |
| tree | 6a4313bfd68288928201061539f0052777b57eb3 /drivers/iio/adc/ad799x.c | |
| parent | staging: iio: Fix format string mismatch in ad7280a.c (diff) | |
| download | linux-82a5803c782417754bdebb8dfa34edc62c0d8bbc.tar.xz linux-82a5803c782417754bdebb8dfa34edc62c0d8bbc.zip | |
staging: iio: ad799x: remove some unneeded IS_ERR() checks
My static checker is upset that we check IS_ERR(t->reg) when we know it
is not an ERR_PTR.
Checking for IS_ERR() twice is often a sign of confusion and buggy code.
In this case, if the call to "ret = regulator_enable(st->vref);" fails,
then we call "regulator_disable(st->vref);" and that's a mistake because
"st->vref" is not enabled.
I fixed these problems and Hartmut Knaack pointed out a couple unneeded
IS_ERR() checks in ad799x_remove() so I have removed those as well.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Hartmut Knaack <knaack.h@gmx.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio/adc/ad799x.c')
| -rw-r--r-- | drivers/iio/adc/ad799x.c | 15 |
1 files changed, 6 insertions, 9 deletions
diff --git a/drivers/iio/adc/ad799x.c b/drivers/iio/adc/ad799x.c index 16a8b14b1921..39b4cb48d738 100644 --- a/drivers/iio/adc/ad799x.c +++ b/drivers/iio/adc/ad799x.c @@ -717,7 +717,7 @@ static int ad799x_probe(struct i2c_client *client, ret = iio_triggered_buffer_setup(indio_dev, NULL, &ad799x_trigger_handler, NULL); if (ret) - goto error_disable_reg; + goto error_disable_vref; if (client->irq > 0) { ret = devm_request_threaded_irq(&client->dev, @@ -739,11 +739,10 @@ static int ad799x_probe(struct i2c_client *client, error_cleanup_ring: iio_triggered_buffer_cleanup(indio_dev); +error_disable_vref: + regulator_disable(st->vref); error_disable_reg: - if (!IS_ERR(st->vref)) - regulator_disable(st->vref); - if (!IS_ERR(st->reg)) - regulator_disable(st->reg); + regulator_disable(st->reg); return ret; } @@ -756,10 +755,8 @@ static int ad799x_remove(struct i2c_client *client) iio_device_unregister(indio_dev); iio_triggered_buffer_cleanup(indio_dev); - if (!IS_ERR(st->vref)) - regulator_disable(st->vref); - if (!IS_ERR(st->reg)) - regulator_disable(st->reg); + regulator_disable(st->vref); + regulator_disable(st->reg); kfree(st->rx_buf); return 0; |