Follow the advice of the Documentation/filesystems/sysfs.rst and show()
should only use sysfs_emit() or sysfs_emit_at() when formatting the
value to be returned to user space.

Signed-off-by: Bo Liu <liubo03@inspur.com>
---
 net/rfkill/core.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/net/rfkill/core.c b/net/rfkill/core.c
index b390ff245d5e..a103b2da4ed2 100644
--- a/net/rfkill/core.c
+++ b/net/rfkill/core.c
@@ -685,7 +685,7 @@ static ssize_t name_show(struct device *dev, struct device_attribute *attr,
 {
 	struct rfkill *rfkill = to_rfkill(dev);
 
-	return sprintf(buf, "%s\n", rfkill->name);
+	return sysfs_emit(buf, "%s\n", rfkill->name);
 }
 static DEVICE_ATTR_RO(name);
 
@@ -694,7 +694,7 @@ static ssize_t type_show(struct device *dev, struct device_attribute *attr,
 {
 	struct rfkill *rfkill = to_rfkill(dev);
 
-	return sprintf(buf, "%s\n", rfkill_types[rfkill->type]);
+	return sysfs_emit(buf, "%s\n", rfkill_types[rfkill->type]);
 }
 static DEVICE_ATTR_RO(type);
 
@@ -703,7 +703,7 @@ static ssize_t index_show(struct device *dev, struct device_attribute *attr,
 {
 	struct rfkill *rfkill = to_rfkill(dev);
 
-	return sprintf(buf, "%d\n", rfkill->idx);
+	return sysfs_emit(buf, "%d\n", rfkill->idx);
 }
 static DEVICE_ATTR_RO(index);
 
@@ -712,7 +712,7 @@ static ssize_t persistent_show(struct device *dev,
 {
 	struct rfkill *rfkill = to_rfkill(dev);
 
-	return sprintf(buf, "%d\n", rfkill->persistent);
+	return sysfs_emit(buf, "%d\n", rfkill->persistent);
 }
 static DEVICE_ATTR_RO(persistent);
 
@@ -721,7 +721,7 @@ static ssize_t hard_show(struct device *dev, struct device_attribute *attr,
 {
 	struct rfkill *rfkill = to_rfkill(dev);
 
-	return sprintf(buf, "%d\n", (rfkill->state & RFKILL_BLOCK_HW) ? 1 : 0 );
+	return sysfs_emit(buf, "%d\n", (rfkill->state & RFKILL_BLOCK_HW) ? 1 : 0 );
 }
 static DEVICE_ATTR_RO(hard);
 
@@ -730,7 +730,7 @@ static ssize_t soft_show(struct device *dev, struct device_attribute *attr,
 {
 	struct rfkill *rfkill = to_rfkill(dev);
 
-	return sprintf(buf, "%d\n", (rfkill->state & RFKILL_BLOCK_SW) ? 1 : 0 );
+	return sysfs_emit(buf, "%d\n", (rfkill->state & RFKILL_BLOCK_SW) ? 1 : 0 );
 }
 
 static ssize_t soft_store(struct device *dev, struct device_attribute *attr,
@@ -764,7 +764,7 @@ static ssize_t hard_block_reasons_show(struct device *dev,
 {
 	struct rfkill *rfkill = to_rfkill(dev);
 
-	return sprintf(buf, "0x%lx\n", rfkill->hard_block_reasons);
+	return sysfs_emit(buf, "0x%lx\n", rfkill->hard_block_reasons);
 }
 static DEVICE_ATTR_RO(hard_block_reasons);
 
@@ -783,7 +783,7 @@ static ssize_t state_show(struct device *dev, struct device_attribute *attr,
 {
 	struct rfkill *rfkill = to_rfkill(dev);
 
-	return sprintf(buf, "%d\n", user_state_from_blocked(rfkill->state));
+	return sysfs_emit(buf, "%d\n", user_state_from_blocked(rfkill->state));
 }
 
 static ssize_t state_store(struct device *dev, struct device_attribute *attr,
-- 
2.27.0

Hi Bo Liu,

On Wed, Feb 01, 2023 at 03:17:18AM -0500, Bo Liu wrote:
> Follow the advice of the Documentation/filesystems/sysfs.rst and show()
> should only use sysfs_emit() or sysfs_emit_at() when formatting the
> value to be returned to user space.

Thanks for your patch. As it is not a bug fix it should be targeted at
'net-next' (as opposed to 'net'). This should be specified in the patch
subject something like this:

[PATCH net-next v2] rfkill: Use sysfs_emit() to instead of sprintf()

> Signed-off-by: Bo Liu <liubo03@inspur.com>
> ---
>  net/rfkill/core.c | 16 ++++++++--------
>  1 file changed, 8 insertions(+), 8 deletions(-)
> 
> diff --git a/net/rfkill/core.c b/net/rfkill/core.c
> index b390ff245d5e..a103b2da4ed2 100644
> --- a/net/rfkill/core.c
> +++ b/net/rfkill/core.c

...

> @@ -721,7 +721,7 @@ static ssize_t hard_show(struct device *dev, struct device_attribute *attr,
>  {
>  	struct rfkill *rfkill = to_rfkill(dev);
>  
> -	return sprintf(buf, "%d\n", (rfkill->state & RFKILL_BLOCK_HW) ? 1 : 0 );
> +	return sysfs_emit(buf, "%d\n", (rfkill->state & RFKILL_BLOCK_HW) ? 1 : 0 );
	return sysfs_emit(buf, "%d\n", (rfkill->state & RFKILL_BLOCK_HW) ? 1 : 0);

./scripts/checkpatch.pl complains that there should not be a space before
the last ')'.

Simon Horman <simon.horman@corigine.com> writes:

> Hi Bo Liu,
>
> On Wed, Feb 01, 2023 at 03:17:18AM -0500, Bo Liu wrote:
>> Follow the advice of the Documentation/filesystems/sysfs.rst and show()
>> should only use sysfs_emit() or sysfs_emit_at() when formatting the
>> value to be returned to user space.
>
> Thanks for your patch. As it is not a bug fix it should be targeted at
> 'net-next' (as opposed to 'net'). This should be specified in the patch
> subject something like this:
>
> [PATCH net-next v2] rfkill: Use sysfs_emit() to instead of sprintf()

rfkill patches should go to wireless-next, right?

-- 
https://patchwork.kernel.org/project/linux-wireless/list/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches

On Tue, Feb 07, 2023 at 05:09:02PM +0200, Kalle Valo wrote:
> Simon Horman <simon.horman@corigine.com> writes:
> 
> > Hi Bo Liu,
> >
> > On Wed, Feb 01, 2023 at 03:17:18AM -0500, Bo Liu wrote:
> >> Follow the advice of the Documentation/filesystems/sysfs.rst and show()
> >> should only use sysfs_emit() or sysfs_emit_at() when formatting the
> >> value to be returned to user space.
> >
> > Thanks for your patch. As it is not a bug fix it should be targeted at
> > 'net-next' (as opposed to 'net'). This should be specified in the patch
> > subject something like this:
> >
> > [PATCH net-next v2] rfkill: Use sysfs_emit() to instead of sprintf()
> 
> rfkill patches should go to wireless-next, right?

Yes, my bad.