[PATCH 13/13] accel/habanalabs: modify pci health check

[Carl Vanderlip]

On 2/20/2024 8:01 AM, Oded Gabbay wrote:
> From: Ofir Bitton <obitton at habana.ai>
> 
> Today we read PCI VENDOR-ID in order to make sure PCI link is
> healthy. Apparently the VENDOR-ID might be stored on host and
> hence, when we read it we might not access the PCI bus.
> In order to make sure PCI health check is reliable, we will start
> checking the DEVICE-ID instead.

What's keeping some system from caching that as well?

Since this is checking for PCIe link health, it will be 0xFF when bad. 
Checking some part of Config Space that is writable would be more reliable.

-Carl V.