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iio: accel: mma9553: check for error in reading initial activity and stepcnt

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When configuring gpio, we need to read initial values for activity and
step count. This function may fail due to i2c read errors.

Check the error code returned by mma9553_read_activity_stepcnt
and return the appropriate error in gpio config function.

Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
Reported-by: Hartmut Knaack <knaack.h@gmx.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Irina Tirdea 2015-04-13 18:40:54 +03:00 committed by Jonathan Cameron
parent 476c41a73e
commit 1d052931c6
1 changed files with 6 additions and 3 deletions
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9
drivers/iio/accel/mma9553.c
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@ -365,9 +365,12 @@ static int mma9553_conf_gpio(struct mma9553_data *data)
return 0;
/* Save initial values for activity and stepcnt */
if (activity_enabled || ev_step_detect->enabled)
mma9553_read_activity_stepcnt(data, &data->activity,
&data->stepcnt);
if (activity_enabled || ev_step_detect->enabled) {
ret = mma9553_read_activity_stepcnt(data, &data->activity,
&data->stepcnt);
if (ret < 0)
return ret;
}
ret = mma9551_gpio_config(data->client,
MMA9553_DEFAULT_GPIO_PIN,