Messages in this thread | | | From | "Michael Kelley (EOSG)" <> | Subject | RE: [PATCH v2]PCI: hv: fix PCI-BUS domainID corruption | Date | Wed, 14 Mar 2018 19:56:13 +0000 |
| |
> -----Original Message----- > From: Sridhar Pitchai > Sent: Wednesday, March 14, 2018 11:08 AM > To: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>; Michael Kelley (EOSG) > <Michael.H.Kelley@microsoft.com> > Cc: Bjorn Helgaas <bhelgaas@google.com>; Jake Oshins <jakeo@microsoft.com>; Haiyang > Zhang <haiyangz@microsoft.com>; Stephen Hemminger <sthemmin@microsoft.com>; Dexuan > Cui <decui@microsoft.com>; KY Srinivasan <kys@microsoft.com>; > devel@linuxdriverproject.org; linux-pci@vger.kernel.org; linux-kernel@vger.kernel.org > 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@vger.kernel.org > Signed-off-by: Sridhar Pitchai <srpitcha@microsoft.com> > ---
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
| |