[PATCH] platform/x86: intel: wmi: Use sysfs_emit and remove dead callbacks

[PATCH] platform/x86: intel: wmi: Use sysfs_emit and remove dead callbacks

[svav2021]

From: Arav Verma <svav2021@gmail.com>

Modernize firmware_update_request_show by replacing legacy
sprintf() call with sysfs_emit(). When altering string, also
corrected format specifier from %d to %u to match u32 type of
target variable.

Additionally, remove empty .probe and .remove callbacks from
wmi_driver struct, as they were print-only and redundant.

Signed-off-by: Arav Verma <svav2021@gmail.com>
---
 drivers/platform/x86/intel/wmi/sbl-fw-update.c | 16 +---------------
 1 file changed, 1 insertion(+), 15 deletions(-)

diff --git a/drivers/platform/x86/intel/wmi/sbl-fw-update.c b/drivers/platform/x86/intel/wmi/sbl-fw-update.c
index 62c9c7f18..7e07cfab2 100644
--- a/drivers/platform/x86/intel/wmi/sbl-fw-update.c
+++ b/drivers/platform/x86/intel/wmi/sbl-fw-update.c
@@ -61,7 +61,7 @@ static ssize_t firmware_update_request_show(struct device *dev,
 	if (ret)
 		return ret;
 
-	return sprintf(buf, "%d\n", val);
+	return sysfs_emit(buf, "%u\n", val);
 }
 
 static ssize_t firmware_update_request_store(struct device *dev,
@@ -93,18 +93,6 @@ static struct attribute *firmware_update_attrs[] = {
 };
 ATTRIBUTE_GROUPS(firmware_update);
 
-static int intel_wmi_sbl_fw_update_probe(struct wmi_device *wdev,
-					 const void *context)
-{
-	dev_info(&wdev->dev, "Slim Bootloader signaling driver attached\n");
-	return 0;
-}
-
-static void intel_wmi_sbl_fw_update_remove(struct wmi_device *wdev)
-{
-	dev_info(&wdev->dev, "Slim Bootloader signaling driver removed\n");
-}
-
 static const struct wmi_device_id intel_wmi_sbl_id_table[] = {
 	{ .guid_string = INTEL_WMI_SBL_GUID },
 	{}
@@ -116,8 +104,6 @@ static struct wmi_driver intel_wmi_sbl_fw_update_driver = {
 		.name = "intel-wmi-sbl-fw-update",
 		.dev_groups = firmware_update_groups,
 	},
-	.probe = intel_wmi_sbl_fw_update_probe,
-	.remove = intel_wmi_sbl_fw_update_remove,
 	.id_table = intel_wmi_sbl_id_table,
 	.no_singleton = true,
 };
-- 
2.47.3

Re: [PATCH] platform/x86: intel: wmi: Use sysfs_emit and remove dead callbacks

[Ilpo Järvinen]

On Sun, 9 Aug 2026, svav2021@gmail.com wrote:

> From: Arav Verma <svav2021@gmail.com>
> 
> Modernize firmware_update_request_show by replacing legacy
> sprintf() call with sysfs_emit(). When altering string, also
> corrected format specifier from %d to %u to match u32 type of
> target variable.
> 
> Additionally, remove empty .probe and .remove callbacks from
> wmi_driver struct, as they were print-only and redundant.

Hi,

Please split these two entirely independent changes to two a patch series.

Always stop and reconsider when you have to say "Additionally,"; one 
almost always wants to add another patch into the series instead of 
writing that magic phrase.

> Signed-off-by: Arav Verma <svav2021@gmail.com>
> ---
>  drivers/platform/x86/intel/wmi/sbl-fw-update.c | 16 +---------------
>  1 file changed, 1 insertion(+), 15 deletions(-)
> 
> diff --git a/drivers/platform/x86/intel/wmi/sbl-fw-update.c b/drivers/platform/x86/intel/wmi/sbl-fw-update.c
> index 62c9c7f18..7e07cfab2 100644
> --- a/drivers/platform/x86/intel/wmi/sbl-fw-update.c
> +++ b/drivers/platform/x86/intel/wmi/sbl-fw-update.c
> @@ -61,7 +61,7 @@ static ssize_t firmware_update_request_show(struct device *dev,
>  	if (ret)
>  		return ret;
>  
> -	return sprintf(buf, "%d\n", val);
> +	return sysfs_emit(buf, "%u\n", val);
>  }
>  
>  static ssize_t firmware_update_request_store(struct device *dev,
> @@ -93,18 +93,6 @@ static struct attribute *firmware_update_attrs[] = {
>  };
>  ATTRIBUTE_GROUPS(firmware_update);
>  
> -static int intel_wmi_sbl_fw_update_probe(struct wmi_device *wdev,
> -					 const void *context)
> -{
> -	dev_info(&wdev->dev, "Slim Bootloader signaling driver attached\n");
> -	return 0;
> -}
> -
> -static void intel_wmi_sbl_fw_update_remove(struct wmi_device *wdev)
> -{
> -	dev_info(&wdev->dev, "Slim Bootloader signaling driver removed\n");
> -}
> -
>  static const struct wmi_device_id intel_wmi_sbl_id_table[] = {
>  	{ .guid_string = INTEL_WMI_SBL_GUID },
>  	{}
> @@ -116,8 +104,6 @@ static struct wmi_driver intel_wmi_sbl_fw_update_driver = {
>  		.name = "intel-wmi-sbl-fw-update",
>  		.dev_groups = firmware_update_groups,
>  	},
> -	.probe = intel_wmi_sbl_fw_update_probe,
> -	.remove = intel_wmi_sbl_fw_update_remove,
>  	.id_table = intel_wmi_sbl_id_table,
>  	.no_singleton = true,
>  };
> 

-- 
 i.