ACPI: platform_profile: Improve platform_profile_unregister()

Drivers usually call this method on error/exit paths and do not check
for it's return value, which is always 0 anyway, so make it void.

This is safe to do as currently all drivers use
devm_platform_profile_register().

While at it, improve the style and make the function safer by checking
for IS_ERR_OR_NULL before dereferencing the device pointer.

Signed-off-by: Kurt Borja <[email protected]>
Reviewed-by: Mark Pearson <[email protected]>
Link: https://patch.msgid.link/[email protected]
[ rjw: Minor changelog edits ]
Signed-off-by: Rafael J. Wysocki <[email protected]>

2 files changed, 10 insertions, 11 deletions

diff --git a/drivers/acpi/platform_profile.c b/drivers/acpi/platform_profile.c
index 1b6317f759f9..f01455905830 100644
--- a/drivers/acpi/platform_profile.c
+++ b/drivers/acpi/platform_profile.c
@@ -569,24 +569,23 @@ EXPORT_SYMBOL_GPL(platform_profile_register);
 /**
  * platform_profile_remove - Unregisters a platform profile class device
  * @dev: Class device
- *
- * Return: 0
  */
-int platform_profile_remove(struct device *dev)
+void platform_profile_remove(struct device *dev)
 {
-	struct platform_profile_handler *pprof = to_pprof_handler(dev);
-	int id;
+	struct platform_profile_handler *pprof;
+
+	if (IS_ERR_OR_NULL(dev))
+		return;
+
+	pprof = to_pprof_handler(dev);
+
 	guard(mutex)(&profile_lock);
 
-	id = pprof->minor;
+	ida_free(&platform_profile_ida, pprof->minor);
 	device_unregister(&pprof->dev);
-	ida_free(&platform_profile_ida, id);
 
 	sysfs_notify(acpi_kobj, NULL, "platform_profile");
-
 	sysfs_update_group(acpi_kobj, &platform_profile_group);
-
-	return 0;
 }
 EXPORT_SYMBOL_GPL(platform_profile_remove);
 
diff --git a/include/linux/platform_profile.h b/include/linux/platform_profile.h
index 8ab5b0e8eb2c..d5499eca9e1d 100644
--- a/include/linux/platform_profile.h
+++ b/include/linux/platform_profile.h
@@ -47,7 +47,7 @@ struct platform_profile_ops {
 struct device *platform_profile_register(struct device *dev, const char *name,
 					 void *drvdata,
 					 const struct platform_profile_ops *ops);
-int platform_profile_remove(struct device *dev);
+void platform_profile_remove(struct device *dev);
 struct device *devm_platform_profile_register(struct device *dev, const char *name,
 					      void *drvdata,
 					      const struct platform_profile_ops *ops);