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Date: Wed, 14 Mar 2018 19:56:13 +0000 From: "Michael Kelley (EOSG)" <Michael.H.Kelley@...rosoft.com> To: Sridhar Pitchai <Sridhar.Pitchai@...rosoft.com>, Lorenzo Pieralisi <lorenzo.pieralisi@....com> CC: Bjorn Helgaas <bhelgaas@...gle.com>, Jake Oshins <jakeo@...rosoft.com>, Haiyang Zhang <haiyangz@...rosoft.com>, Stephen Hemminger <sthemmin@...rosoft.com>, Dexuan Cui <decui@...rosoft.com>, KY Srinivasan <kys@...rosoft.com>, "devel@...uxdriverproject.org" <devel@...uxdriverproject.org>, "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org> Subject: RE: [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 <lorenzo.pieralisi@....com>; Michael Kelley (EOSG) > <Michael.H.Kelley@...rosoft.com> > Cc: Bjorn Helgaas <bhelgaas@...gle.com>; Jake Oshins <jakeo@...rosoft.com>; Haiyang > Zhang <haiyangz@...rosoft.com>; Stephen Hemminger <sthemmin@...rosoft.com>; Dexuan > Cui <decui@...rosoft.com>; KY Srinivasan <kys@...rosoft.com>; > devel@...uxdriverproject.org; linux-pci@...r.kernel.org; linux-kernel@...r.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@...r.kernel.org > Signed-off-by: Sridhar Pitchai <srpitcha@...rosoft.com> > --- Reviewed-by: Michael Kelley <mikelley@...rosoft.com>
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