RE: [PATCH v2]PCI: hv: fix PCI-BUS domainID corruption

[Michael Kelley (EOSG)]

> -----Original Message-----
> From: Sridhar Pitchai
> Sent: Wednesday, March 14, 2018 11:08 AM
> To: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx>; Michael Kelley (EOSG)
> <Michael.H.Kelley@xxxxxxxxxxxxx>
> Cc: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>; Jake Oshins <jakeo@xxxxxxxxxxxxx>; Haiyang
> Zhang <haiyangz@xxxxxxxxxxxxx>; Stephen Hemminger <sthemmin@xxxxxxxxxxxxx>; Dexuan
> Cui <decui@xxxxxxxxxxxxx>; KY Srinivasan <kys@xxxxxxxxxxxxx>;
> devel@xxxxxxxxxxxxxxxxxxxxxx; linux-pci@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx
> Subject: [PATCH v2]PCI: hv: fix PCI-BUS domainID corruption
> 
>     Whenever PCI bus is added, HyperV guarantees the BUS id is unique. Even with
>     that when a first device is added to the bus, it overrides bus domain ID with
>     the device serial number. Sometime this can result in BUS ID not being unique.
>     In this case, when PCI_BUS and a device added to the bus, even before the PCI
>     BUS is added to kernel, the first device tends to overwrite the domain ID with
>     0. Since there exists a PCI bus with domain ID 0 already the PCI bus addition
>     fails. This patch make sure when a device is added to a bus, it never updated
>     the bus domain ID. Since we have the transparent SRIOV mode now, the short VF
>     device name is no longer needed.
> 
>     Fixes: 4a9b0933bdfc("PCI:hv:Use device serial number as PCI domain")
>     Cc: stable@xxxxxxxxxxxxxxx
>     Signed-off-by: Sridhar Pitchai <srpitcha@xxxxxxxxxxxxx>
>     ---

Reviewed-by: Michael Kelley <mikelley@xxxxxxxxxxxxx>