linux-kernel - Re: [PATCH, RESEND, pci, v2] pci: Delete PCI disabling informational messages

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Date:   Tue, 10 Apr 2018 16:58:38 -0300
From:   "Desnes A. Nunes do Rosario" <desnesn@...ux.vnet.ibm.com>
To:     Bjorn Helgaas <helgaas@...nel.org>
Cc:     linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, bhelgaas@...gle.com
Subject: Re: [PATCH, RESEND, pci, v2] pci: Delete PCI disabling informational
 messages

Bjorn,

On 04/10/2018 04:55 PM, Bjorn Helgaas wrote:
> On Tue, Apr 10, 2018 at 02:36:31PM -0500, Bjorn Helgaas wrote:
>> On Wed, Apr 04, 2018 at 12:10:35PM -0300, Desnes A. Nunes do Rosario wrote:
>>> The disabling informational messages on the PCI subsystem should be deleted
>>> since they do not represent any real value for the system logs.
>>>
>>> These messages are either not presented, or presented for all PCI devices
>>> (e.g., powerpc now realigns all PCI devices to its page size). Thus, they
>>> are flooding system logs and can be interpreted as a false positive for
>>> total PCI failure on the system.
>>>
>>> [root@...tem user]# dmesg | grep -i disabling
>>> [    0.692270] pci 0000:00:00.0: Disabling memory decoding and releasing memory resources
>>> [    0.692324] pci 0000:00:00.0: disabling bridge mem windows
>>> [    0.729134] pci 0001:00:00.0: Disabling memory decoding and releasing memory resources
>>> [    0.737352] pci 0001:00:00.0: disabling bridge mem windows
>>> [    0.776295] pci 0002:00:00.0: Disabling memory decoding and releasing memory resources
>>> [    0.784509] pci 0002:00:00.0: disabling bridge mem windows
>>> ... and goes on for all PCI devices on the system ...
>>>
>>> Fixes: 38274637699 ("powerpc/powernv: Override pcibios_default_alignment() to force PCI devices to be page aligned")
>>> Signed-off-by: Desnes A. Nunes do Rosario <desnesn@...ux.vnet.ibm.com>
>>
>> Applied to pci/resource for v4.18, thanks!
>>
>> I should have gotten this in for v4.17, but I didn't; sorry about that.
> 
> This is trivial and I'm planning to squeeze a few more things into v4.17,
> so I moved this to my "for-linus" branch for v4.17.

No need for apologies.

On the contrary, thank you very much for your review and branch change.

> 
>>> ---
>>>   drivers/pci/pci.c       | 1 -
>>>   drivers/pci/setup-res.c | 2 --
>>>   2 files changed, 3 deletions(-)
>>>
>>> diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
>>> index 8c71d1a66cdd..1563ce1ee091 100644
>>> --- a/drivers/pci/pci.c
>>> +++ b/drivers/pci/pci.c
>>> @@ -5505,7 +5505,6 @@ void pci_reassigndev_resource_alignment(struct pci_dev *dev)
>>>   		return;
>>>   	}
>>>   
>>> -	pci_info(dev, "Disabling memory decoding and releasing memory resources\n");
>>>   	pci_read_config_word(dev, PCI_COMMAND, &command);
>>>   	command &= ~PCI_COMMAND_MEMORY;
>>>   	pci_write_config_word(dev, PCI_COMMAND, command);
>>> diff --git a/drivers/pci/setup-res.c b/drivers/pci/setup-res.c
>>> index 369d48d6c6f1..6bd35e8e7cde 100644
>>> --- a/drivers/pci/setup-res.c
>>> +++ b/drivers/pci/setup-res.c
>>> @@ -172,8 +172,6 @@ EXPORT_SYMBOL(pci_claim_resource);
>>>   
>>>   void pci_disable_bridge_window(struct pci_dev *dev)
>>>   {
>>> -	pci_info(dev, "disabling bridge mem windows\n");
>>> -
>>>   	/* MMIO Base/Limit */
>>>   	pci_write_config_dword(dev, PCI_MEMORY_BASE, 0x0000fff0);
>>>   
>>> -- 
>>> 2.14.3
>>>
> 

-- 
Desnes A. Nunes do Rosario
--------------------------
Linux Developer - IBM