linux-kernel - Re: [PATCH] ACPI / processor_idle: Set default C1 state description

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Date:   Thu, 08 Feb 2018 11:00:20 +0100
From:   "Rafael J. Wysocki" <rjw@...ysocki.net>
To:     Yazen Ghannam <Yazen.Ghannam@....com>
Cc:     linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
        lenb@...nel.org
Subject: Re: [PATCH] ACPI / processor_idle: Set default C1 state description

On Monday, January 29, 2018 9:22:49 PM CET Yazen Ghannam wrote:
> From: Yazen Ghannam <yazen.ghannam@....com>
> 
> The acpi_idle driver will default to ACPI_CSTATE_HALT for C1 if a _CST
> object for C1 is not defined. However, the description will not be set,
> so users will see "<null>" when reading the description from sysfs.
> 
> Set the C1 state description when defaulting to ACPI_CSTATE_HALT.
> 
> Signed-off-by: Yazen Ghannam <yazen.ghannam@....com>
> Cc: stable@...r.kernel.org
> ---
>  drivers/acpi/processor_idle.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
> index 5f0071c7e2e1..abb559cd28d7 100644
> --- a/drivers/acpi/processor_idle.c
> +++ b/drivers/acpi/processor_idle.c
> @@ -292,6 +292,9 @@ static int acpi_processor_get_power_info_default(struct acpi_processor *pr)
>  		pr->power.states[ACPI_STATE_C1].type = ACPI_STATE_C1;
>  		pr->power.states[ACPI_STATE_C1].valid = 1;
>  		pr->power.states[ACPI_STATE_C1].entry_method = ACPI_CSTATE_HALT;
> +
> +		snprintf(pr->power.states[ACPI_STATE_C1].desc,
> +			 ACPI_CX_DESC_LEN, "ACPI HLT");
>  	}
>  	/* the C0 state only exists as a filler in our array */
>  	pr->power.states[ACPI_STATE_C0].valid = 1;
> 

Applied, thanks!