linux-kernel - Re: [PATCH] PCI / ACPI / PM: Use correct power state strings in messages

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Message-ID: <CAErSpo7Q8H5wmMUPKqquerp_zbFwnac95Gbezd2=STBjtUrnvw@mail.gmail.com>
Date:	Fri, 14 Jun 2013 11:08:44 -0600
From:	Bjorn Helgaas <bhelgaas@...gle.com>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Linux PCI <linux-pci@...r.kernel.org>,
	Linux PM list <linux-pm@...r.kernel.org>,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>
Subject: Re: [PATCH] PCI / ACPI / PM: Use correct power state strings in messages

On Thu, Jun 13, 2013 at 4:29 PM, Rafael J. Wysocki <rjw@...k.pl> wrote:
> From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
>
> Make acpi_pci_set_power_state() print the name of the ACPI device
> power state the device has been actually put into instead of printing
> the name of the requested PCI device power state, which need not be
> the same.
>
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> ---
>
> For 3.11.
>
> Thanks,
> Rafael
>
> ---
>  drivers/pci/pci-acpi.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> Index: linux-pm/drivers/pci/pci-acpi.c
> ===================================================================
> --- linux-pm.orig/drivers/pci/pci-acpi.c
> +++ linux-pm/drivers/pci/pci-acpi.c
> @@ -211,7 +211,7 @@ static int acpi_pci_set_power_state(stru
>
>         if (!error)
>                 dev_info(&dev->dev, "power state changed by ACPI to %s\n",
> -                        pci_power_name(state));
> +                        acpi_power_state_string(state_conv[state]));
>
>         return error;
>  }
>

Just to double-check this, it *looks* like the effective change is
that for PCI_D3hot and PCI_D3cold, we'll print "(unknown)" instead of
"D3hot" and "D3cold" because state_conv[] folds both PCI_D3hot and
PCI_D3cold into ACPI_STATE_D3, and acpi_power_state_string() doesn't
have a case for ACPI_STATE_D3.

Is that what you intended?

Bjorn
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