linux-kernel - Re: [PATCH 1/1] iio: Prefer octal over symbolic permissions.

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Message-ID: <20220528183405.22b55033@jic23-huawei>
Date:   Sat, 28 May 2022 18:34:05 +0100
From:   Jonathan Cameron <jic23@...nel.org>
To:     Joe Simmons-Talbott <joetalbott@...il.com>
Cc:     linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] iio: Prefer octal over symbolic permissions.

On Fri, 27 May 2022 14:56:52 -0400
Joe Simmons-Talbott <joetalbott@...il.com> wrote:

> As reported by checkpatch.pl use ocatl permissions rather than symbolic
> permissions.
> 
> Signed-off-by: Joe Simmons-Talbott <joetalbott@...il.com>

Hi Joe,

Why the resend?  Given change of description, I'm guessing this is v2
because of feedback on a similar patch elsewhere. If so, please
put the version number in the patch log and provide a changelog
below the ---

Hmm. I guess I don't really mind cleaning this up though it is
some churn in core code which is usually something we try to avoid
for fairly trivial style reasons.

One request inline (though I suspect it applies in several places,
I just haven't checked ;)

Thanks,

Jonathan

> ---
>  drivers/iio/industrialio-buffer.c  | 12 ++++++------
>  drivers/iio/industrialio-core.c    | 10 +++++-----
>  drivers/iio/industrialio-trigger.c |  4 ++--
>  3 files changed, 13 insertions(+), 13 deletions(-)
> 
> diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c
> index b078eb2f3c9d..c27f74a3c0f3 100644
> --- a/drivers/iio/industrialio-buffer.c
> +++ b/drivers/iio/industrialio-buffer.c
> @@ -1391,17 +1391,17 @@ static ssize_t direction_show(struct device *dev,
>  	}
>  }
>  
> -static DEVICE_ATTR(length, S_IRUGO | S_IWUSR, iio_buffer_read_length,
> +static DEVICE_ATTR(length, 0644, iio_buffer_read_length,
>  		   iio_buffer_write_length);
>  static struct device_attribute dev_attr_length_ro = __ATTR(length,
> -	S_IRUGO, iio_buffer_read_length, NULL);
> -static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR,
> +	0444, iio_buffer_read_length, NULL);
> +static DEVICE_ATTR(enable, 0644,
>  		   iio_buffer_show_enable, iio_buffer_store_enable);
> -static DEVICE_ATTR(watermark, S_IRUGO | S_IWUSR,
> +static DEVICE_ATTR(watermark, 0644,
>  		   iio_buffer_show_watermark, iio_buffer_store_watermark);
>  static struct device_attribute dev_attr_watermark_ro = __ATTR(watermark,
> -	S_IRUGO, iio_buffer_show_watermark, NULL);
> -static DEVICE_ATTR(data_available, S_IRUGO,
> +	0444, iio_buffer_show_watermark, NULL);
> +static DEVICE_ATTR(data_available, 0444,
>  		iio_dma_show_data_available, NULL);

a side effect of this change a slight shortening of how long the above
two lines will be if combined into one.  It's now sub 80 chars
I think, so please make them a single line.  Also check for similar
cases elsewhere.


>  static DEVICE_ATTR_RO(direction);
>  
> diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
> index e1ed44dec2ab..35de348d686e 100644
> --- a/drivers/iio/industrialio-core.c
> +++ b/drivers/iio/industrialio-core.c
> @@ -1114,12 +1114,12 @@ int __iio_device_attr_init(struct device_attribute *dev_attr,
>  	dev_attr->attr.name = name;
>  
>  	if (readfunc) {
> -		dev_attr->attr.mode |= S_IRUGO;
> +		dev_attr->attr.mode |= 0444;
>  		dev_attr->show = readfunc;
>  	}
>  
>  	if (writefunc) {
> -		dev_attr->attr.mode |= S_IWUSR;
> +		dev_attr->attr.mode |= 0200;
>  		dev_attr->store = writefunc;
>  	}
>  
> @@ -1401,7 +1401,7 @@ static ssize_t iio_show_dev_name(struct device *dev,
>  	return sysfs_emit(buf, "%s\n", indio_dev->name);
>  }
>  
> -static DEVICE_ATTR(name, S_IRUGO, iio_show_dev_name, NULL);
> +static DEVICE_ATTR(name, 0444, iio_show_dev_name, NULL);
>  
>  static ssize_t iio_show_dev_label(struct device *dev,
>  				 struct device_attribute *attr,
> @@ -1411,7 +1411,7 @@ static ssize_t iio_show_dev_label(struct device *dev,
>  	return sysfs_emit(buf, "%s\n", indio_dev->label);
>  }
>  
> -static DEVICE_ATTR(label, S_IRUGO, iio_show_dev_label, NULL);
> +static DEVICE_ATTR(label, 0444, iio_show_dev_label, NULL);
>  
>  static ssize_t iio_show_timestamp_clock(struct device *dev,
>  					struct device_attribute *attr,
> @@ -1509,7 +1509,7 @@ int iio_device_register_sysfs_group(struct iio_dev *indio_dev,
>  	return 0;
>  }
>  
> -static DEVICE_ATTR(current_timestamp_clock, S_IRUGO | S_IWUSR,
> +static DEVICE_ATTR(current_timestamp_clock, 0644,
>  		   iio_show_timestamp_clock, iio_store_timestamp_clock);
>  
>  static int iio_device_register_sysfs(struct iio_dev *indio_dev)
> diff --git a/drivers/iio/industrialio-trigger.c b/drivers/iio/industrialio-trigger.c
> index f504ed351b3e..e22a35634f2c 100644
> --- a/drivers/iio/industrialio-trigger.c
> +++ b/drivers/iio/industrialio-trigger.c
> @@ -54,7 +54,7 @@ static ssize_t iio_trigger_read_name(struct device *dev,
>  	return sysfs_emit(buf, "%s\n", trig->name);
>  }
>  
> -static DEVICE_ATTR(name, S_IRUGO, iio_trigger_read_name, NULL);
> +static DEVICE_ATTR(name, 0444, iio_trigger_read_name, NULL);
>  
>  static struct attribute *iio_trig_dev_attrs[] = {
>  	&dev_attr_name.attr,
> @@ -494,7 +494,7 @@ static ssize_t iio_trigger_write_current(struct device *dev,
>  	return ret;
>  }
>  
> -static DEVICE_ATTR(current_trigger, S_IRUGO | S_IWUSR,
> +static DEVICE_ATTR(current_trigger, 0644,
>  		   iio_trigger_read_current,
>  		   iio_trigger_write_current);
>