linux-kernel - [PATCH 0/2] PCI: rockchip: Fix PCIe probing in 5.9

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Date:   Sat, 15 Aug 2020 13:51:10 +0100
From:   Marc Zyngier <maz@...nel.org>
To:     linux-pci@...r.kernel.org, linux-rockchip@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     Shawn Lin <shawn.lin@...k-chips.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Rob Herring <robh@...nel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Heiko Stuebner <heiko@...ech.de>, kernel-team@...roid.com
Subject: [PATCH 0/2] PCI: rockchip: Fix PCIe probing in 5.9

Recent changes to the way PCI DT nodes are parsed are now enforcing
the presence of a "device_type" property, which has been mandated
since... forever. This has the unfortunate effect of breaking
non-compliant systems, and those using the Rockchip PCIe driver are
amongst the victims. Oh well.

In order to keep users happy as well as my own machines up and
running, let's paper over the problem by detecting a broken DT from
the driver itself, and inserting the missing property at runtime.

For a good measure, a second patch fixes the DT, but the chances of
such a fix being deployed at this stage are pretty slim, so the above
hack is in for the long run.

Marc Zyngier (2):
  PCI: rockchip: Work around missing device_type property in DT
  arm64: dts: rockchip: Fix PCIe DT properties

 arch/arm64/boot/dts/rockchip/rk3399.dtsi    |  2 +-
 drivers/pci/controller/pcie-rockchip-host.c | 29 +++++++++++++++++++++
 2 files changed, 30 insertions(+), 1 deletion(-)

-- 
2.27.0