linux-kernel - Re: [PATCH] PCI: mvebu: Dispose INTx irqs prior to removing INTx domain

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Message-ID: <20220711134418.69f20344@thinkpad>
Date:   Mon, 11 Jul 2022 13:44:18 +0200
From:   Marek Behún <kabel@...nel.org>
To:     Pali Rohár <pali@...nel.org>
Cc:     Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Hajo Noerenberg <hajo-linux-bugzilla@...renberg.de>,
        linux-pci@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] PCI: mvebu: Dispose INTx irqs prior to removing INTx
 domain

On Sat,  9 Jul 2022 18:18:58 +0200
Pali Rohár <pali@...nel.org> wrote:

> Documentation for irq_domain_remove() says that all mapping within the
> domain must be disposed prior to domain remove.
> 
> Currently INTx irqs are not disposed in pci-mvebu.c device unbind callback
> which cause that kernel crashes after unloading driver and trying to read
> /sys/kernel/debug/irq/irqs/<num> or /proc/interrupts.
> 
> Fixes: ec075262648f ("PCI: mvebu: Implement support for legacy INTx interrupts")
> Reported-by: Hajo Noerenberg <hajo-linux-bugzilla@...renberg.de>
> Signed-off-by: Pali Rohár <pali@...nel.org>

Reviewed-by: Marek Behún <kabel@...nel.org>