linux-kernel - Re: [PATCH v2 2/2] PCI: of_property: Omit 'bus-range' property if no secondary bus

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Message-ID: <0f75b9fc-88a5-410e-a07f-5901b16a1fbc@windriver.com>
Date: Fri, 21 Mar 2025 09:17:01 +0800
From: Bo Sun <Bo.Sun.CN@...driver.com>
To: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Cc: Bjorn Helgaas <bhelgaas@...gle.com>, Vidya Sagar <vidyas@...dia.com>,
        linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
        Kevin Hao <kexin.hao@...driver.com>,
        Bjorn Helgaas <helgaas@...nel.org>
Subject: Re: [PATCH v2 2/2] PCI: of_property: Omit 'bus-range' property if no
 secondary bus

On 3/18/25 14:29, Manivannan Sadhasivam wrote:
> CAUTION: This email comes from a non Wind River email account!
> Do not click links or open attachments unless you recognize the sender and know the content is safe.
> 
> On Tue, Mar 11, 2025 at 09:52:29PM +0800, Bo Sun wrote:
>> The previous implementation of of_pci_add_properties() and
>> of_pci_prop_bus_range() assumed that a valid secondary bus is always
>> present, which can be problematic in cases where no bus numbers are
>> assigned for a secondary bus. This patch introduces a check for a valid
>> secondary bus and omits the 'bus-range' property if it is not available,
>> preventing dereferencing the NULL pointer.
>>
> 
> This definitely needs a Fixes tag and should be backported.

OK, I will add the Fixes tag and send the v3 patches.

Thanks,
Bo