Am 19.11.24 um 18:17 schrieb Mario Limonciello:
> In order to have a device for the platform profile core to reference
> create a platform device for dell-pc.
>
> While doing this change the memory allocation for the thermal handler
> to be device managed to follow the lifecycle of that device.
>
> Reviewed-by: Armin Wolf <W_Armin@gmx.de>
> Tested-by: Mark Pearson <mpearson-lenovo@squebb.ca>
> Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
> Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
> ---
> v6:
> * Use PLATFORM_DEVID_NONE (Armin)
> v5:
> * use platform_device_register_simple()
> ---
> drivers/platform/x86/dell/dell-pc.c | 32 +++++++++++++++++++++--------
> 1 file changed, 23 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/platform/x86/dell/dell-pc.c b/drivers/platform/x86/dell/dell-pc.c
> index 3cf79e55e3129..805497e44b3a5 100644
> --- a/drivers/platform/x86/dell/dell-pc.c
> +++ b/drivers/platform/x86/dell/dell-pc.c
> @@ -18,10 +18,13 @@
> #include <linux/kernel.h>
> #include <linux/module.h>
> #include <linux/platform_profile.h>
> +#include <linux/platform_device.h>
> #include <linux/slab.h>
>
> #include "dell-smbios.h"
>
> +static struct platform_device *platform_device;
> +
> static const struct dmi_system_id dell_device_table[] __initconst = {
> {
> .ident = "Dell Inc.",
> @@ -244,9 +247,15 @@ static int thermal_init(void)
> if (!supported_modes)
> return 0;
>
> - thermal_handler = kzalloc(sizeof(*thermal_handler), GFP_KERNEL);
> - if (!thermal_handler)
> + platform_device = platform_device_register_simple("dell-pc", PLATFORM_DEVID_NONE, NULL, 0);
> + if (!platform_device)
> return -ENOMEM;
Sorry for taking so long to notice that, but the documentation for platform_device_register_simple() says:
"Returns &struct platform_device pointer on success, or ERR_PTR() on
error." So please use IS_ERR() for checking the platform_device pointer,
since a simple NULL-check is not enough. Thanks, Armin Wolf
> +
> + thermal_handler = devm_kzalloc(&platform_device->dev, sizeof(*thermal_handler), GFP_KERNEL);
> + if (!thermal_handler) {
> + ret = -ENOMEM;
> + goto cleanup_platform_device;
> + }
> thermal_handler->name = "dell-pc";
> thermal_handler->profile_get = thermal_platform_profile_get;
> thermal_handler->profile_set = thermal_platform_profile_set;
> @@ -262,20 +271,25 @@ static int thermal_init(void)
>
> /* Clean up if failed */
> ret = platform_profile_register(thermal_handler);
> - if (ret) {
> - kfree(thermal_handler);
> - thermal_handler = NULL;
> - }
> + if (ret)
> + goto cleanup_thermal_handler;
> +
> + return 0;
> +
> +cleanup_thermal_handler:
> + thermal_handler = NULL;
> +
> +cleanup_platform_device:
> + platform_device_unregister(platform_device);
>
> return ret;
> }
>
> static void thermal_cleanup(void)
> {
> - if (thermal_handler) {
> + if (thermal_handler)
> platform_profile_remove();
> - kfree(thermal_handler);
> - }
> + platform_device_unregister(platform_device);
> }
>
> static int __init dell_init(void)