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iio:st_sensors: Fix oops when probing SPI devices 

In SPI mode the transfer buffer is locked with a mutex. However this
mutex is only initilized after the probe, but some transfer needs to
be done in the probe.

To fix this bug we move the mutex initialization at the beginning of
the device probe.

Signed-off-by: Alban Bedel <alban.bedel@avionic-design.de>
Acked-by: Denis Ciocca <denis.ciocca@st.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Alban Bedel 2015-04-20 13:57:18 +02:00 committed by Jonathan Cameron
parent 97ffae1d30
commit 8e71c04f86
5 changed files with 4 additions and 2 deletions
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1
drivers/iio/accel/st_accel_core.c
View File

@ -546,6 +546,7 @@ int st_accel_common_probe(struct iio_dev *indio_dev)
indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->info = &accel_info;
mutex_init(&adata->tb.buf_lock);
st_sensors_power_enable(indio_dev);

2
drivers/iio/common/st_sensors/st_sensors_core.c
View File

@ -304,8 +304,6 @@ int st_sensors_init_sensor(struct iio_dev *indio_dev,
struct st_sensors_platform_data *of_pdata;
int err = 0;
mutex_init(&sdata->tb.buf_lock);
/* If OF/DT pdata exists, it will take precedence of anything else */
of_pdata = st_sensors_of_probe(indio_dev->dev.parent, pdata);
if (of_pdata)

1
drivers/iio/gyro/st_gyro_core.c
View File

@ -400,6 +400,7 @@ int st_gyro_common_probe(struct iio_dev *indio_dev)
indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->info = &gyro_info;
mutex_init(&gdata->tb.buf_lock);
st_sensors_power_enable(indio_dev);

1
drivers/iio/magnetometer/st_magn_core.c
View File

@ -369,6 +369,7 @@ int st_magn_common_probe(struct iio_dev *indio_dev)
indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->info = &magn_info;
mutex_init(&mdata->tb.buf_lock);
st_sensors_power_enable(indio_dev);

1
drivers/iio/pressure/st_pressure_core.c
View File

@ -417,6 +417,7 @@ int st_press_common_probe(struct iio_dev *indio_dev)
indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->info = &press_info;
mutex_init(&press_data->tb.buf_lock);
st_sensors_power_enable(indio_dev);