linux-kernel - [PATCH 0/3] PCI: arm64/powerpc: Fix parsing of linux,pci-probe-only

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Date:	Fri, 14 Aug 2015 15:41:05 +0100
From:	Marc Zyngier <marc.zyngier@....com>
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>,
	Michael Ellerman <mpe@...erman.id.au>,
	Will Deacon <will.deacon@....com>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>,
	Lorenzo Pieralisi <lorenzo.pieralisi@....com>
Cc:	Alexander Graf <agraf@...e.de>, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linuxppc-dev@...ts.ozlabs.org, linux-pci@...r.kernel.org
Subject: [PATCH 0/3] PCI: arm64/powerpc: Fix parsing of linux,pci-probe-only

The pci-host-generic driver parses the linux,pci-probe-only property,
and assumes that it will have a boolean parameter.

Turns out that the Seattle DTS file has a naked "linux,pci-probe-only"
property, which leads to the driver dereferencing some unsuspecting
memory location. Nothing really bad happens (we end up reading some
other bit of DT, fortunately), but that not a reason to keep it this
way.

The first patch fixes the driver not to do silly things, and simply
give a warning when this happens. The powerpc code from where this
code was lifted is also fixed in a second patch.

Finally, the bad property is removed from the Seatle DTS, because it
is simply not necessary (it actually prevents me from using SR-IOV,
which otherwise runs fine without the probe-only thing).

Marc Zyngier (3):
  PCI: pci-host-generic: Fix lookup of linux,pci-probe-only property
  powerpc: PCI: Fix lookup of linux,pci-probe-only property
  arm64: dts: Drop linux,pci-probe-only from the Seattle DTS

 arch/arm64/boot/dts/amd/amd-overdrive.dts |  1 -
 arch/powerpc/platforms/pseries/setup.c    | 15 ++++++++++-----
 drivers/pci/host/pci-host-generic.c       | 15 ++++++++++-----
 3 files changed, 20 insertions(+), 11 deletions(-)

-- 
2.1.4

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