linux-kernel - Re: [PATCH] PCI: pciehp: hide ENTRY messages behind ctrl

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Date:	Thu, 31 Jan 2013 10:13:17 -0700
From:	Bjorn Helgaas <bhelgaas@...gle.com>
To:	Paul Bolle <pebolle@...cali.nl>
Cc:	linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
	"Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: [PATCH] PCI: pciehp: hide ENTRY messages behind ctrl_dbg()

[+cc Rafael]

On Mon, Jan 28, 2013 at 3:00 AM, Paul Bolle <pebolle@...cali.nl> wrote:
> In each suspend and resume cycle my laptop prints these messages at
> KERN_INFO level:
>     pciehp 0000:00:1c.1:pcie04: pciehp_suspend ENTRY
>     pciehp 0000:00:1c.0:pcie04: pciehp_suspend ENTRY
>
> and
>     pciehp 0000:00:1c.0:pcie04: pciehp_resume ENTRY
>     pciehp 0000:00:1c.1:pcie04: pciehp_resume ENTRY
>
> Messages like these are probably only useful while debugging pciehp, so
> let's hide them behind the ctrl_dbg() macro.
>
> Signed-off-by: Paul Bolle <pebolle@...cali.nl>
> ---
> 0) Compile tested only!
>
> 1) Perhaps a better solution is to drop these messages entirely.
>
>  drivers/pci/hotplug/pciehp_core.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/pci/hotplug/pciehp_core.c b/drivers/pci/hotplug/pciehp_core.c
> index 939bd1d..ed1702d 100644
> --- a/drivers/pci/hotplug/pciehp_core.c
> +++ b/drivers/pci/hotplug/pciehp_core.c
> @@ -293,7 +293,8 @@ static void pciehp_remove(struct pcie_device *dev)
>  #ifdef CONFIG_PM
>  static int pciehp_suspend (struct pcie_device *dev)
>  {
> -       dev_info(&dev->device, "%s ENTRY\n", __func__);
> +       struct controller *ctrl = get_service_data(dev);
> +       ctrl_dbg(ctrl, "%s ENTRY\n", __func__);
>         return 0;

I'd propose to just drop these messages completely.  Rafael, would you
have any objection to that?

>  }
>
> @@ -303,8 +304,8 @@ static int pciehp_resume (struct pcie_device *dev)
>         struct slot *slot;
>         u8 status;
>
> -       dev_info(&dev->device, "%s ENTRY\n", __func__);
>         ctrl = get_service_data(dev);
> +       ctrl_dbg(ctrl, "%s ENTRY\n", __func__);
>
>         /* reinitialize the chipset's event detection logic */
>         pcie_enable_notification(ctrl);
> --
> 1.7.11.7
>
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