[PATCH] char: ipmi: use DEVICE_ATTR helper macro

[PATCH] char: ipmi: use DEVICE_ATTR helper macro

[Dwaipayan Ray]

Instead of open coding DEVICE_ATTR, use the helper macro
DEVICE_ATTR_RO to replace DEVICE_ATTR with 0444 octal
permissions.

This was detected as a part of checkpatch evaluation
investigating all reports of DEVICE_ATTR_RO warning
type.

Signed-off-by: Dwaipayan Ray <dwaipayanray1@gmail.com>
---
 drivers/char/ipmi/ipmi_si_intf.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c
index 62929a3e397e..1cbc6a6a3ef4 100644
--- a/drivers/char/ipmi/ipmi_si_intf.c
+++ b/drivers/char/ipmi/ipmi_si_intf.c
@@ -1605,7 +1605,7 @@ static ssize_t name##_show(struct device *dev,			\
 									\
 	return snprintf(buf, 10, "%u\n", smi_get_stat(smi_info, name));	\
 }									\
-static DEVICE_ATTR(name, 0444, name##_show, NULL)
+static DEVICE_ATTR_RO(name)
 
 static ssize_t type_show(struct device *dev,
 			 struct device_attribute *attr,
@@ -1615,7 +1615,7 @@ static ssize_t type_show(struct device *dev,
 
 	return snprintf(buf, 10, "%s\n", si_to_str[smi_info->io.si_type]);
 }
-static DEVICE_ATTR(type, 0444, type_show, NULL);
+static DEVICE_ATTR_RO(type);
 
 static ssize_t interrupts_enabled_show(struct device *dev,
 				       struct device_attribute *attr,
@@ -1626,8 +1626,7 @@ static ssize_t interrupts_enabled_show(struct device *dev,
 
 	return snprintf(buf, 10, "%d\n", enabled);
 }
-static DEVICE_ATTR(interrupts_enabled, 0444,
-		   interrupts_enabled_show, NULL);
+static DEVICE_ATTR_RO(interrupts_enabled);
 
 IPMI_SI_ATTR(short_timeouts);
 IPMI_SI_ATTR(long_timeouts);
@@ -1658,7 +1657,7 @@ static ssize_t params_show(struct device *dev,
 			smi_info->io.irq,
 			smi_info->io.slave_addr);
 }
-static DEVICE_ATTR(params, 0444, params_show, NULL);
+static DEVICE_ATTR_RO(params);
 
 static struct attribute *ipmi_si_dev_attrs[] = {
 	&dev_attr_type.attr,
-- 
2.28.0

Re: [PATCH] char: ipmi: use DEVICE_ATTR helper macro

[Corey Minyard]

On Fri, Jul 30, 2021 at 11:59:51AM +0530, Dwaipayan Ray wrote:
> Instead of open coding DEVICE_ATTR, use the helper macro
> DEVICE_ATTR_RO to replace DEVICE_ATTR with 0444 octal
> permissions.

Looks good, this is queued for the next release.

-corey

> 
> This was detected as a part of checkpatch evaluation
> investigating all reports of DEVICE_ATTR_RO warning
> type.
> 
> Signed-off-by: Dwaipayan Ray <dwaipayanray1@gmail.com>
> ---
>  drivers/char/ipmi/ipmi_si_intf.c | 9 ++++-----
>  1 file changed, 4 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c
> index 62929a3e397e..1cbc6a6a3ef4 100644
> --- a/drivers/char/ipmi/ipmi_si_intf.c
> +++ b/drivers/char/ipmi/ipmi_si_intf.c
> @@ -1605,7 +1605,7 @@ static ssize_t name##_show(struct device *dev,			\
>  									\
>  	return snprintf(buf, 10, "%u\n", smi_get_stat(smi_info, name));	\
>  }									\
> -static DEVICE_ATTR(name, 0444, name##_show, NULL)
> +static DEVICE_ATTR_RO(name)
>  
>  static ssize_t type_show(struct device *dev,
>  			 struct device_attribute *attr,
> @@ -1615,7 +1615,7 @@ static ssize_t type_show(struct device *dev,
>  
>  	return snprintf(buf, 10, "%s\n", si_to_str[smi_info->io.si_type]);
>  }
> -static DEVICE_ATTR(type, 0444, type_show, NULL);
> +static DEVICE_ATTR_RO(type);
>  
>  static ssize_t interrupts_enabled_show(struct device *dev,
>  				       struct device_attribute *attr,
> @@ -1626,8 +1626,7 @@ static ssize_t interrupts_enabled_show(struct device *dev,
>  
>  	return snprintf(buf, 10, "%d\n", enabled);
>  }
> -static DEVICE_ATTR(interrupts_enabled, 0444,
> -		   interrupts_enabled_show, NULL);
> +static DEVICE_ATTR_RO(interrupts_enabled);
>  
>  IPMI_SI_ATTR(short_timeouts);
>  IPMI_SI_ATTR(long_timeouts);
> @@ -1658,7 +1657,7 @@ static ssize_t params_show(struct device *dev,
>  			smi_info->io.irq,
>  			smi_info->io.slave_addr);
>  }
> -static DEVICE_ATTR(params, 0444, params_show, NULL);
> +static DEVICE_ATTR_RO(params);
>  
>  static struct attribute *ipmi_si_dev_attrs[] = {
>  	&dev_attr_type.attr,
> -- 
> 2.28.0
>