linux-kernel - Re: [PATCH v2 3/9] PCI/PME: Prefix dmesg logs with PCIe service name

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Message-ID: <20190503195557.GC180403@google.com>
Date:   Fri, 3 May 2019 14:55:57 -0500
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     Frederick Lawler <fred@...dlawl.com>
Cc:     linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
        mika.westerberg@...ux.intel.com, lukas@...ner.de,
        andriy.shevchenko@...ux.intel.com, keith.busch@...el.com,
        mr.nuke.me@...il.com, liudongdong3@...wei.com, thesven73@...il.com
Subject: Re: [PATCH v2 3/9] PCI/PME: Prefix dmesg logs with PCIe service name

On Thu, May 02, 2019 at 10:59:40PM -0500, Frederick Lawler wrote:
> Prefix dmesg logs with PCIe service name.

... to make it consistent with other PCIe services.

It's interesting that there are three uses here:

  pci_dbg(port, "PME interrupt generated for non-existent device ...")
  pci_dbg(port, "Spurious native PME interrupt!\n")
  pci_info(port, "Signaling PME with IRQ %d\n", srv->irq)

The first two use pci_dbg(), so whether it goes anywhere depends on
CONFIG_DYNAMIC_DEBUG and DEBUG.  To me they seem interesting enough to
become pci_info().

And all three already include "PME", so I could go either way with
adding the prefix.  But I agree that having it consistent with the
other services is probably a nice small hint that this is a PCIe port
thing, not an endpoint thing.

> Signed-off-by: Frederick Lawler <fred@...dlawl.com>
> ---
>  drivers/pci/pcie/pme.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/pci/pcie/pme.c b/drivers/pci/pcie/pme.c
> index 54d593d10396..d6698423a6d6 100644
> --- a/drivers/pci/pcie/pme.c
> +++ b/drivers/pci/pcie/pme.c
> @@ -7,6 +7,8 @@
>   * Copyright (C) 2009 Rafael J. Wysocki <rjw@...k.pl>, Novell Inc.
>   */
>  
> +#define dev_fmt(fmt) "PME: " fmt
> +
>  #include <linux/pci.h>
>  #include <linux/kernel.h>
>  #include <linux/errno.h>
> -- 
> 2.17.1
>