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Subject[PATCH 2/3] staging:iio:magnetometer:ak8975: Don't assume 0 is an invalid GPIO
Date
gpio_is_valid() is the defined mechanism to determine whether a GPIO is
valid. Use this instead of assuming that 0 is an invalid GPIO.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
---
drivers/staging/iio/magnetometer/ak8975.c | 11 +++++------
1 files changed, 5 insertions(+), 6 deletions(-)
diff --git a/drivers/staging/iio/magnetometer/ak8975.c b/drivers/staging/iio/magnetometer/ak8975.c
index bd40e32..79ed183 100644
--- a/drivers/staging/iio/magnetometer/ak8975.c
+++ b/drivers/staging/iio/magnetometer/ak8975.c
@@ -373,7 +373,7 @@ static int ak8975_read_axis(struct iio_dev *indio_dev, int index, int *val)
}

/* Wait for the conversion to complete. */
- if (data->eoc_gpio)
+ if (gpio_is_valid(data->eoc_gpio))
ret = wait_conversion_complete_gpio(data);
else
ret = wait_conversion_complete_polled(data);
@@ -481,7 +481,7 @@ static int ak8975_probe(struct i2c_client *client,

/* We may not have a GPIO based IRQ to scan, that is fine, we will
poll if so */
- if (eoc_gpio > 0) {
+ if (gpio_is_valid(eoc_gpio)) {
err = gpio_request(eoc_gpio, "ak_8975");
if (err < 0) {
dev_err(&client->dev,
@@ -497,8 +497,7 @@ static int ak8975_probe(struct i2c_client *client,
eoc_gpio, err);
goto exit_gpio;
}
- } else
- eoc_gpio = 0; /* No GPIO available */
+ }

/* Register with IIO */
indio_dev = iio_allocate_device(sizeof(*data));
@@ -534,7 +533,7 @@ static int ak8975_probe(struct i2c_client *client,
exit_free_iio:
iio_free_device(indio_dev);
exit_gpio:
- if (eoc_gpio)
+ if (gpio_is_valid(eoc_gpio))
gpio_free(eoc_gpio);
exit:
return err;
@@ -549,7 +548,7 @@ static int ak8975_remove(struct i2c_client *client)
iio_device_unregister(indio_dev);
iio_free_device(indio_dev);

- if (eoc_gpio)
+ if (gpio_is_valid(eoc_gpio))
gpio_free(eoc_gpio);

return 0;
--
1.7.0.4


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