Re: [PATCH v6 09/14] platform/x86: dell-smbios: Introduce dispatcher for SMM calls
From: Pali RohÃr
Date: Tue Oct 10 2017 - 15:08:51 EST
On Monday 09 October 2017 17:51:47 Mario Limonciello wrote:
> static void dell_rfkill_query(struct rfkill *rfkill, void *data)
> {
> - struct calling_interface_buffer *buffer;
> int radio = ((unsigned long)data & 0xF);
> int hwswitch;
> int status;
> int ret;
>
> - buffer = dell_smbios_get_buffer();
> -
> - dell_smbios_send_request(17, 11);
> - ret = buffer->output[0];
> + ret = dell_send_request(17, 11, 0, 0, 0, 0);
Basically I do not like function which takes ten numeric parameters.
Before in this code there was just function with 2 parameters, now there
are lot of zero parameters, without information what which parameter
means...
> diff --git a/drivers/platform/x86/dell-smbios.c b/drivers/platform/x86/dell-smbios.c
> index ade248646578..386130811a34 100644
> --- a/drivers/platform/x86/dell-smbios.c
> +++ b/drivers/platform/x86/dell-smbios.c
> +void dell_smbios_get_smm_address(int *address, int *code)
> +{
> + *address = da_command_address;
> + *code = da_command_code;
> +}
> +EXPORT_SYMBOL_GPL(dell_smbios_get_smm_address);
Should not be this function in dell-smbios-smm driver instead of the
dispatcher? It has in name "smm" and also is specific for smm driver...
> diff --git a/drivers/platform/x86/dell-wmi.c b/drivers/platform/x86/dell-wmi.c
> index 90d7e8e55e9b..b74f48d17116 100644
> --- a/drivers/platform/x86/dell-wmi.c
> +++ b/drivers/platform/x86/dell-wmi.c
> @@ -641,13 +641,16 @@ static int dell_wmi_events_set_enabled(bool enable)
> struct calling_interface_buffer *buffer;
> int ret;
>
> - buffer = dell_smbios_get_buffer();
> + buffer = (void *)get_zeroed_page(GFP_KERNEL);
It is still needed to ask for page? Is not enough to allocate memory via
some *alloc function?
> + buffer->class = 17;
> + buffer->select = 3;
> buffer->input[0] = 0x10000;
> buffer->input[1] = 0x51534554;
> buffer->input[3] = enable;
> - dell_smbios_send_request(17, 3);
> - ret = buffer->output[0];
> - dell_smbios_release_buffer();
> + ret = dell_smbios_call(buffer);
> + if (ret == 0)
> + ret = buffer->output[0];
> + free_page((unsigned long)buffer);
>
> return dell_smbios_error(ret);
> }
--
Pali RohÃr
pali.rohar@xxxxxxxxx