linux-kernel - [PATCH 0/3] of: irq: Fixes refcount issues with of_irq_parse_one()/of_irq_parse

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Message-ID: <20230301185209.274134-1-jjhiblot@traphandler.com>
Date:   Wed, 1 Mar 2023 19:52:06 +0100
From:   Jean-Jacques Hiblot <jjhiblot@...phandler.com>
To:     <saravanak@...gle.com>, <clement.leger@...tlin.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Magnus Damm <magnus.damm@...il.com>,
        Russell King <linux@...linux.org.uk>,
        Michael Ellerman <mpe@...erman.id.au>,
        Nicholas Piggin <npiggin@...il.com>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        <zajec5@...il.com>, Daniel Lezcano <daniel.lezcano@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Claudiu Beznea <claudiu.beznea@...rochip.com>,
        Marc Zyngier <maz@...nel.org>, <afaerber@...e.de>,
        Manivannan Sadhasivam <mani@...nel.org>,
        Palmer Dabbelt <palmer@...belt.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Samuel Holland <samuel@...lland.org>,
        Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Nishanth Menon <nm@...com>, <ssantosh@...nel.org>,
        <mathias.nyman@...el.com>, <gregkh@...uxfoundation.org>,
        <thierry.reding@...il.com>, <jonathanh@...dia.com>
CC:     <linux-renesas-soc@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <linuxppc-dev@...ts.ozlabs.org>,
        <linux-wireless@...r.kernel.org>,
        <linux-actions@...ts.infradead.org>,
        <linux-riscv@...ts.infradead.org>, <linux-sunxi@...ts.linux.dev>,
        <devicetree@...r.kernel.org>, <linux-pci@...r.kernel.org>,
        <linux-usb@...r.kernel.org>, <linux-tegra@...r.kernel.org>,
        Jean-Jacques Hiblot <jjhiblot@...phandler.com>
Subject: [PATCH 0/3] of: irq: Fixes refcount issues with of_irq_parse_one()/of_irq_parse_raw()

This series attempts to fix refcounting issues related to of_irq_parse_one()
and of_irq_parse_raw().

The first issue is simply that most callers of of_irq_parse_one() and
of_irq_parse_raw() don't call of_node_put() on the returned device node when
they no longer need it.

The second issue is a double get() happening in of_irq_parse_one() when
parsing the "interrupts-extended" properties.

WARNING: I tried to be careful when modifying the callers of
of_irq_parse_one()/of_irq_parse_raw() but haven't test-build all the changes.


Jean-Jacques Hiblot (3):
  of: irq: make callers of of_irq_parse_raw() release the device node
  of: irq: make callers of of_irq_parse_one() release the device node
  of: irq: release the node after looking up for "interrupts-extended"

 .../mach-shmobile/regulator-quirk-rcar-gen2.c |  1 +
 arch/powerpc/platforms/fsl_uli1575.c          |  1 +
 arch/powerpc/sysdev/mpic_msi.c                |  1 +
 drivers/bcma/main.c                           |  5 +++-
 drivers/clocksource/timer-clint.c             |  1 +
 drivers/irqchip/irq-mchp-eic.c                |  1 +
 drivers/irqchip/irq-owl-sirq.c                |  1 +
 drivers/irqchip/irq-renesas-rzg2l.c           |  1 +
 drivers/irqchip/irq-sifive-plic.c             |  1 +
 drivers/irqchip/irq-sun6i-r.c                 |  2 ++
 drivers/of/irq.c                              | 30 ++++++++++++++-----
 drivers/of/unittest.c                         |  7 +++++
 drivers/pci/of.c                              |  6 +++-
 drivers/soc/ti/knav_qmss_queue.c              |  3 ++
 drivers/usb/host/xhci-tegra.c                 |  1 +
 15 files changed, 53 insertions(+), 9 deletions(-)

-- 
2.25.1