Re: [PATCH] PCI/VPD: Silence warning if optional VPD PROM is missing

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On 07.03.2021 19:27, Krzysztof Wilczyński wrote:
> Hi Heiner,
> 
>> Realtek RTL8169/8168/8125 NIC families indicate VPD capability and an
>> optional VPD EEPROM can be connected via I2C/SPI. However I haven't
>> seen any card or system with such a VPD EEPROM yet. The missing EEPROM
>> causes the following warning whenever e.g. lscpi -vv is executed.
>>
>> invalid short VPD tag 00 at offset 01
>>
>> The warning confuses users, I think we should handle the situation more
>> gentle. Therefore, if first VPD byte is read as 0x00, assume a missing
>> optional VPD PROM as and silently set the VPD length to 0.
> [...]
> 
> True.  I saw people on different forum and IRC asking for clarification
> assuming their NIC broke, or that something is wrong, so this would
> indeed save them some worry, nice!
> 
> Having said that, I also saw this particular warning showing up for some
> storage controllers (often some SAS cards), so a question here: would it
> warrant adding a pci_dbg() with an appropriate message rather than just
> returning 0?  I wonder if this might be useful for someone who is trying
> to troubleshoot and/or debug some issues with their device.
> 
> What do you think?
> 
I don't have a strong opinion here, but yes, that's something we could do.

> Krzysztof
> 




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