linux-kernel - Re: [PATCH v2 2/2] iio: ina2xx: Remove trace

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Date:	Wed, 24 Feb 2016 20:45:18 +0000
From:	Jonathan Cameron <jic23@...nel.org>
To:	"Andrew F. Davis" <afd@...com>, Hartmut Knaack <knaack.h@....de>,
	Lars-Peter Clausen <lars@...afoo.de>,
	Peter Meerwald <pmeerw@...erw.net>,
	Marc Titinger <mtitinger@...libre.com>
Cc:	linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/2] iio: ina2xx: Remove trace_printk debug statments

On 24/02/16 17:38, Andrew F. Davis wrote:
> These are generally for devlopment use only, remove these
> from performance-critical code, convert to dev_dbg elswhere.
> 
> Signed-off-by: Andrew F. Davis <afd@...com>
Applied.
> ---
>  drivers/iio/adc/ina2xx-adc.c | 21 +++++++--------------
>  1 file changed, 7 insertions(+), 14 deletions(-)
> 
> diff --git a/drivers/iio/adc/ina2xx-adc.c b/drivers/iio/adc/ina2xx-adc.c
> index d3e8207..65909d5 100644
> --- a/drivers/iio/adc/ina2xx-adc.c
> +++ b/drivers/iio/adc/ina2xx-adc.c
> @@ -440,7 +440,6 @@ static int ina2xx_work_buffer(struct iio_dev *indio_dev)
>  	struct ina2xx_chip_info *chip = iio_priv(indio_dev);
>  	unsigned short data[8];
>  	int bit, ret, i = 0;
> -	unsigned long buffer_us, elapsed_us;
>  	s64 time_a, time_b;
>  	unsigned int alert;
>  
> @@ -464,8 +463,6 @@ static int ina2xx_work_buffer(struct iio_dev *indio_dev)
>  				return ret;
>  
>  			alert &= INA266_CVRF;
> -			trace_printk("Conversion ready: %d\n", !!alert);
> -
>  		} while (!alert);
>  
>  	/*
> @@ -490,14 +487,9 @@ static int ina2xx_work_buffer(struct iio_dev *indio_dev)
>  	iio_push_to_buffers_with_timestamp(indio_dev,
>  					   (unsigned int *)data, time_a);
>  
> -	buffer_us = (unsigned long)(time_b - time_a) / 1000;
> -	elapsed_us = (unsigned long)(time_a - chip->prev_ns) / 1000;
> -
> -	trace_printk("uS: elapsed: %lu, buf: %lu\n", elapsed_us, buffer_us);
> -
>  	chip->prev_ns = time_a;
>  
> -	return buffer_us;
> +	return (unsigned long)(time_b - time_a) / 1000;
>  };
>  
>  static int ina2xx_capture_thread(void *data)
> @@ -532,12 +524,13 @@ static int ina2xx_buffer_enable(struct iio_dev *indio_dev)
>  	struct ina2xx_chip_info *chip = iio_priv(indio_dev);
>  	unsigned int sampling_us = SAMPLING_PERIOD(chip);
>  
> -	trace_printk("Enabling buffer w/ scan_mask %02x, freq = %d, avg =%u\n",
> -		     (unsigned int)(*indio_dev->active_scan_mask),
> -		     1000000/sampling_us, chip->avg);
> +	dev_dbg(&indio_dev->dev, "Enabling buffer w/ scan_mask %02x, freq = %d, avg =%u\n",
> +		(unsigned int)(*indio_dev->active_scan_mask),
> +		1000000 / sampling_us, chip->avg);
>  
> -	trace_printk("Expected work period: %u us\n", sampling_us);
> -	trace_printk("Async readout mode: %d\n", chip->allow_async_readout);
> +	dev_dbg(&indio_dev->dev, "Expected work period: %u us\n", sampling_us);
> +	dev_dbg(&indio_dev->dev, "Async readout mode: %d\n",
> +		chip->allow_async_readout);
>  
>  	chip->prev_ns = iio_get_time_ns();
>  
>