On Thu, 26 Sep 2019 14:18:05 +0300
Alexandru Ardelean <alexandru.ardel...@analog.com> wrote:
> The adis_enable_irq() does a read & a write. This change keeps a lock for
> the duration of both operations vs for each op.
>
> The change is also needed in adis16480, since that has it's own
> implementation for adis_enable_irq().
>
> Signed-off-by: Alexandru Ardelean <alexandru.ardel...@analog.com>
Applied.
Thanks,
Jonathan
> ---
> drivers/iio/imu/adis.c | 17 +++++++++++------
> drivers/iio/imu/adis16480.c | 4 ++--
> 2 files changed, 13 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/iio/imu/adis.c b/drivers/iio/imu/adis.c
> index 4f3be011c898..dc30f70d36f3 100644
> --- a/drivers/iio/imu/adis.c
> +++ b/drivers/iio/imu/adis.c
> @@ -250,12 +250,16 @@ int adis_enable_irq(struct adis *adis, bool enable)
> int ret = 0;
> uint16_t msc;
>
> - if (adis->data->enable_irq)
> - return adis->data->enable_irq(adis, enable);
> + mutex_lock(&adis->state_lock);
> +
> + if (adis->data->enable_irq) {
> + ret = adis->data->enable_irq(adis, enable);
> + goto out_unlock;
> + }
>
> - ret = adis_read_reg_16(adis, adis->data->msc_ctrl_reg, &msc);
> + ret = __adis_read_reg_16(adis, adis->data->msc_ctrl_reg, &msc);
> if (ret)
> - goto error_ret;
> + goto out_unlock;
>
> msc |= ADIS_MSC_CTRL_DATA_RDY_POL_HIGH;
> msc &= ~ADIS_MSC_CTRL_DATA_RDY_DIO2;
> @@ -264,9 +268,10 @@ int adis_enable_irq(struct adis *adis, bool enable)
> else
> msc &= ~ADIS_MSC_CTRL_DATA_RDY_EN;
>
> - ret = adis_write_reg_16(adis, adis->data->msc_ctrl_reg, msc);
> + ret = __adis_write_reg_16(adis, adis->data->msc_ctrl_reg, msc);
>
> -error_ret:
> +out_unlock:
> + mutex_unlock(&adis->state_lock);
> return ret;
> }
> EXPORT_SYMBOL(adis_enable_irq);
> diff --git a/drivers/iio/imu/adis16480.c b/drivers/iio/imu/adis16480.c
> index b99d73887c9f..dc13d8a33612 100644
> --- a/drivers/iio/imu/adis16480.c
> +++ b/drivers/iio/imu/adis16480.c
> @@ -936,14 +936,14 @@ static int adis16480_enable_irq(struct adis *adis, bool
> enable)
> uint16_t val;
> int ret;
>
> - ret = adis_read_reg_16(adis, ADIS16480_REG_FNCTIO_CTRL, &val);
> + ret = __adis_read_reg_16(adis, ADIS16480_REG_FNCTIO_CTRL, &val);
> if (ret < 0)
> return ret;
>
> val &= ~ADIS16480_DRDY_EN_MSK;
> val |= ADIS16480_DRDY_EN(enable);
>
> - return adis_write_reg_16(adis, ADIS16480_REG_FNCTIO_CTRL, val);
> + return __adis_write_reg_16(adis, ADIS16480_REG_FNCTIO_CTRL, val);
> }
>
> static int adis16480_initial_setup(struct iio_dev *indio_dev)
