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SubjectRE: [PATCH v2]PCI: hv: fix PCI-BUS domainID corruption
> -----Original Message-----
> From: Sridhar Pitchai
> Sent: Wednesday, March 14, 2018 11:08 AM
> To: Lorenzo Pieralisi <>; Michael Kelley (EOSG)
> <>
> Cc: Bjorn Helgaas <>; Jake Oshins <>; Haiyang
> Zhang <>; Stephen Hemminger <>; Dexuan
> Cui <>; KY Srinivasan <>;
> 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:
> Signed-off-by: Sridhar Pitchai <>
> ---

Reviewed-by: Michael Kelley <>
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