linux-kernel - Re: [PATCH v5 2/4] alienware-wmi: alienware_wmax

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Message-ID: <3fe7c4e0-c24a-4205-a870-0fcc6e76f1af@gmx.de>
Date: Mon, 14 Oct 2024 18:30:21 +0200
From: Armin Wolf <W_Armin@....de>
To: Kurt Borja <kuurtb@...il.com>
Cc: hdegoede@...hat.com, ilpo.jarvinen@...ux.intel.com,
 linux-kernel@...r.kernel.org, platform-driver-x86@...r.kernel.org
Subject: Re: [PATCH v5 2/4] alienware-wmi: alienware_wmax_command() is now
 input size agnostic

Am 12.10.24 um 04:01 schrieb Kurt Borja:

> alienware_wmax_command() now takes void * and size_t instead of struct
> wmax_basic_args to extend support to new WMAX methods. Also int *out_data
> was changed to u32 *out_data, because new interface specifies u32 as output
> parameter and all previous callers would pass u32 * regardless.

Reviewed-by: Armin Wolf <W_Armin@....de>

> Signed-off-by: Kurt Borja <kuurtb@...il.com>
> ---
>   drivers/platform/x86/dell/alienware-wmi.c | 29 ++++++++++++-----------
>   1 file changed, 15 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/platform/x86/dell/alienware-wmi.c b/drivers/platform/x86/dell/alienware-wmi.c
> index 16a3fe9ac..b27f3b64c 100644
> --- a/drivers/platform/x86/dell/alienware-wmi.c
> +++ b/drivers/platform/x86/dell/alienware-wmi.c
> @@ -500,15 +500,15 @@ static void alienware_zone_exit(struct platform_device *dev)
>   	kfree(zone_attrs);
>   }
>
> -static acpi_status alienware_wmax_command(struct wmax_basic_args *in_args,
> -					  u32 command, int *out_data)
> +static acpi_status alienware_wmax_command(void *in_args, size_t in_size,
> +					  u32 command, u32 *out_data)
>   {
>   	acpi_status status;
>   	union acpi_object *obj;
>   	struct acpi_buffer input;
>   	struct acpi_buffer output;
>
> -	input.length = sizeof(*in_args);
> +	input.length = in_size;
>   	input.pointer = in_args;
>   	if (out_data) {
>   		output.length = ACPI_ALLOCATE_BUFFER;
> @@ -541,8 +541,8 @@ static ssize_t show_hdmi_cable(struct device *dev,
>   		.arg = 0,
>   	};
>   	status =
> -	    alienware_wmax_command(&in_args, WMAX_METHOD_HDMI_CABLE,
> -				   &out_data);
> +	    alienware_wmax_command(&in_args, sizeof(in_args),
> +				   WMAX_METHOD_HDMI_CABLE, &out_data);
>   	if (ACPI_SUCCESS(status)) {
>   		if (out_data == 0)
>   			return sysfs_emit(buf, "[unconnected] connected unknown\n");
> @@ -562,8 +562,8 @@ static ssize_t show_hdmi_source(struct device *dev,
>   		.arg = 0,
>   	};
>   	status =
> -	    alienware_wmax_command(&in_args, WMAX_METHOD_HDMI_STATUS,
> -				   &out_data);
> +	    alienware_wmax_command(&in_args, sizeof(in_args),
> +				   WMAX_METHOD_HDMI_STATUS, &out_data);
>
>   	if (ACPI_SUCCESS(status)) {
>   		if (out_data == 1)
> @@ -589,7 +589,8 @@ static ssize_t toggle_hdmi_source(struct device *dev,
>   		args.arg = 3;
>   	pr_debug("alienware-wmi: setting hdmi to %d : %s", args.arg, buf);
>
> -	status = alienware_wmax_command(&args, WMAX_METHOD_HDMI_SOURCE, NULL);
> +	status = alienware_wmax_command(&args, sizeof(args),
> +					WMAX_METHOD_HDMI_SOURCE, NULL);
>
>   	if (ACPI_FAILURE(status))
>   		pr_err("alienware-wmi: HDMI toggle failed: results: %u\n",
> @@ -642,8 +643,8 @@ static ssize_t show_amplifier_status(struct device *dev,
>   		.arg = 0,
>   	};
>   	status =
> -	    alienware_wmax_command(&in_args, WMAX_METHOD_AMPLIFIER_CABLE,
> -				   &out_data);
> +	    alienware_wmax_command(&in_args, sizeof(in_args),
> +				   WMAX_METHOD_AMPLIFIER_CABLE, &out_data);
>   	if (ACPI_SUCCESS(status)) {
>   		if (out_data == 0)
>   			return sysfs_emit(buf, "[unconnected] connected unknown\n");
> @@ -694,8 +695,8 @@ static ssize_t show_deepsleep_status(struct device *dev,
>   	struct wmax_basic_args in_args = {
>   		.arg = 0,
>   	};
> -	status = alienware_wmax_command(&in_args, WMAX_METHOD_DEEP_SLEEP_STATUS,
> -					&out_data);
> +	status = alienware_wmax_command(&in_args, sizeof(in_args),
> +					WMAX_METHOD_DEEP_SLEEP_STATUS, &out_data);
>   	if (ACPI_SUCCESS(status)) {
>   		if (out_data == 0)
>   			return sysfs_emit(buf, "[disabled] s5 s5_s4\n");
> @@ -723,8 +724,8 @@ static ssize_t toggle_deepsleep(struct device *dev,
>   		args.arg = 2;
>   	pr_debug("alienware-wmi: setting deep sleep to %d : %s", args.arg, buf);
>
> -	status = alienware_wmax_command(&args, WMAX_METHOD_DEEP_SLEEP_CONTROL,
> -					NULL);
> +	status = alienware_wmax_command(&args, sizeof(args),
> +					WMAX_METHOD_DEEP_SLEEP_CONTROL, NULL);
>
>   	if (ACPI_FAILURE(status))
>   		pr_err("alienware-wmi: deep sleep control failed: results: %u\n",