linux-kernel - Re: [PATCH 0/2] Fix kernel splats on boot with armada-37xx irqchip driver

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Date:   Mon, 18 Jul 2022 15:43:19 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Vladimir Oltean <vladimir.oltean@....com>
Cc:     linux-arm-kernel@...ts.infradead.org, Andrew Lunn <andrew@...n.ch>,
        Gregory Clement <gregory.clement@...tlin.com>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        Marek Behún <kabel@...nel.org>,
        Pali Rohár <pali@...nel.org>
Subject: Re: [PATCH 0/2] Fix kernel splats on boot with armada-37xx irqchip driver

On Sun, Jul 17, 2022 at 1:38 AM Vladimir Oltean <vladimir.oltean@....com> wrote:

> Due to these splats on boot, lockdep disables itself on Armada 37xx and
> we fail to see further useful information about real deadlocks.
>
> For those in doubt, the approach to use raw spinlocks for irqchip
> drivers has been previously discussed here and doesn't seem too
> controversial.
> https://lore.kernel.org/lkml/20210825205041.927788-1-vladimir.oltean@nxp.com/
>
> Tested on the Turris MOX board.
>
> Vladimir Oltean (2):
>   pinctrl: armada-37xx: make irq_lock a raw spinlock to avoid invalid
>     wait context
>   pinctrl: armada-37xx: use raw spinlocks for regmap to avoid invalid
>     wait context

Patches applied for fixes so they get some rotation in linux-next.

Reviewers have some days to react before I send this to Torvalds.

Should these even be tagged for stable?

Yours,
Linus Walleij