netdev - Re: [patch 16/30] mfd: ab8500-debugfs: Remove the racy fiddling with irq

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Date:   Fri, 11 Dec 2020 09:22:15 +0100
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Marc Zyngier <maz@...nel.org>,
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Subject: Re: [patch 16/30] mfd: ab8500-debugfs: Remove the racy fiddling with irq_desc

On Thu, Dec 10, 2020 at 8:42 PM Thomas Gleixner <tglx@...utronix.de> wrote:

> First of all drivers have absolutely no business to dig into the internals
> of an irq descriptor. That's core code and subject to change. All of this
> information is readily available to /proc/interrupts in a safe and race
> free way.
>
> Remove the inspection code which is a blatant violation of subsystem
> boundaries and racy against concurrent modifications of the interrupt
> descriptor.
>
> Print the irq line instead so the information can be looked up in a sane
> way in /proc/interrupts.
>
> Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
> Cc: Linus Walleij <linus.walleij@...aro.org>
> Cc: Lee Jones <lee.jones@...aro.org>
> Cc: linux-arm-kernel@...ts.infradead.org

Reviewed-by: Linus Walleij <linus.walleij@...aro.org>

Yours,
Linus Walleij