lkml.org 
[lkml]   [2018]   [Mar]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRE: [PATCH v2]PCI: hv: fix PCI-BUS domainID corruption
Date
> -----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>
\
 
 \ /
  Last update: 2018-03-14 20:56    [W:0.048 / U:0.072 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site