linux-kernel - Re: [PATCH] pci: of : fix BUG: unable to handle kernel

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Date:	Wed, 11 Mar 2015 11:28:15 -0400
From:	Murali Karicheri <m-karicheri2@...com>
To:	Russell King - ARM Linux <linux@....linux.org.uk>
CC:	Rob Herring <robherring2@...il.com>,
	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <robh+dt@...nel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Arnd Bergmann <arnd@...db.de>,
	Suravee Suthikulanit <Suravee.Suthikulpanit@....com>,
	Will Deacon <will.deacon@....com>,
	Joerg Roedel <joro@...tes.org>
Subject: Re: [PATCH] pci: of : fix BUG: unable to handle kernel

On 03/11/2015 08:49 AM, Russell King - ARM Linux wrote:
> On Wed, Mar 11, 2015 at 07:35:45AM -0500, Rob Herring wrote:
>> On Tue, Mar 10, 2015 at 10:25 AM, Murali Karicheri<m-karicheri2@...com>  wrote:
>>> On some platforms such as that based on x86, ia64 etc, root bus is
>>> created with parent node passed in as NULL to pci_create_root_bus().
>>> On these platforms, the patch series "PCI: get DMA configuration from
>>> parent device" when applied causes kernel crash. So add a check for this
>>> in of_pci_dma_configure()
>>
>> Wouldn't these arches have OF disabled and call an empty function?
>> Regardless, we still need this.
>>
>>> Signed-off-by: Murali Karicheri<m-karicheri2@...com>
>>
>> I'm assuming Bjorn will apply this.
>>
>> Acked-by: Rob Herring<robh@...nel.org>
>
> It might be an idea to read the subject line...
>
> "fix BUG: unable to handle kernel"
Russell,

I will fix the subject as "fix BUG: unable to handle kernel NULL 
pointer" and re-send.

Thanks

Murali
>
> which is meaningless.  It needs a much better subject line before it can
> be committed.
>


-- 
Murali Karicheri
Linux Kernel, Texas Instruments
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