linux-kernel - [PATCH 0/3] PCI: host-generic: Fix driver

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Message-Id: <20250625111806.4153773-1-maz@kernel.org>
Date: Wed, 25 Jun 2025 12:18:03 +0100
From: Marc Zyngier <maz@...nel.org>
To: Bjorn Helgaas <bhelgaas@...gle.com>
Cc: Alyssa Rosenzweig <alyssa@...enzweig.io>,
	Rob Herring <robh@...nel.org>,
	Manivannan Sadhasivam <mani@...nel.org>,
	Lorenzo Pieralisi <lpieralisi@...nel.org>,
	Krzysztof Wilczyński <kwilczynski@...nel.org>,
	Janne Grunau <j@...nau.net>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	linux-pci@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-riscv@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 0/3] PCI: host-generic: Fix driver_data overwriting bugs

Geert reports that some drivers do rely on the device driver_data
field containing a pointer to the bridge structure at the point of
initialising the root port, while this has been recently changed to
contain some other data for the benefit of the Apple PCIe driver.

This small series builds on top of Geert previously posted (and
included as a prefix for reference) fix for the Microchip driver,
which breaks the Apple driver. This is basically swapping a regression
for another, which isn't a massive deal at this stage, as the
follow-up patch fixes things for the Apple driver by adding extra
tracking.

Finally, we can revert a one-liner that glued the whole thing
together, and that isn't needed anymore.

All of this is candidate for 6.16, as we have regressed the Microchip
driver in -rc1, and that fixing it breaks the Apple driver.

Geert Uytterhoeven (1):
  PCI: host-generic: Set driver_data before calling gen_pci_init()

Marc Zyngier (2):
  PCI: apple: Add tracking of probed root ports
  Revert "PCI: ecam: Allow cfg->priv to be pre-populated from the root
    port device"

 drivers/pci/controller/pci-host-common.c |  4 +-
 drivers/pci/controller/pcie-apple.c      | 53 ++++++++++++++++++++++--
 drivers/pci/ecam.c                       |  2 -
 3 files changed, 51 insertions(+), 8 deletions(-)

-- 
2.39.2