Re: [PATCH v2 5/6] iio: imu: st_lsm6dsx: always enter interrupt thread

[Lorenzo Bianconi <lorenzo@kernel.org>]

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> The interrupt source can come from multiple sources,
> fifo and wake interrupts.
> Enter interrupt thread to check which interrupt that has fired.
> 
> Signed-off-by: Sean Nyekjaer <sean@geanix.com>
> ---
> 
> Changes since v1:
>  * None
> 
>  drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c | 14 +++++++-------
>  1 file changed, 7 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c
> index fc450eeb9870..0503abab6efc 100644
> --- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c
> +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c
> @@ -1215,19 +1215,19 @@ int st_lsm6dsx_event_setup(int id, struct st_lsm6dsx_hw *hw)
>  
>  static irqreturn_t st_lsm6dsx_handler_irq(int irq, void *private)
>  {
> -	struct st_lsm6dsx_hw *hw = private;
> -
> -	return hw->sip > 0 ? IRQ_WAKE_THREAD : IRQ_NONE;
> +	return IRQ_WAKE_THREAD;
>  }
>  
>  static irqreturn_t st_lsm6dsx_handler_thread(int irq, void *private)
>  {
>  	struct st_lsm6dsx_hw *hw = private;
> -	int count;
> +	int count = 0;
>  
> -	mutex_lock(&hw->fifo_lock);
> -	count = st_lsm6dsx_read_fifo(hw);
> -	mutex_unlock(&hw->fifo_lock);
> +	if (hw->sip > 0) {

I think we do not need this if() statement since st_lsm6dsx_read_fifo will
return 0 in case

> +		mutex_lock(&hw->fifo_lock);
> +		count = st_lsm6dsx_read_fifo(hw);
> +		mutex_unlock(&hw->fifo_lock);
> +	}
>  
>  	return !count ? IRQ_NONE : IRQ_HANDLED;
>  }
> -- 
> 2.22.0
> 

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