linux-kernel - Re: [PATCH v4 4/4] pinctrl: rockchip: avoid hardirq-unsafe functions in irq

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Message-ID: <CACRpkdYy9cygGCYJcWQiO+iv2TSwphBxiiShsE4gWPUgM9z67A@mail.gmail.com>
Date:   Tue, 28 Mar 2017 11:19:31 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     John Keeping <john@...anate.com>
Cc:     Heiko Stuebner <heiko@...ech.de>, Julia Cartwright <julia@...com>,
        "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "open list:ARM/Rockchip SoC..." <linux-rockchip@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 4/4] pinctrl: rockchip: avoid hardirq-unsafe functions
 in irq_chip

On Thu, Mar 23, 2017 at 11:59 AM, John Keeping <john@...anate.com> wrote:

> With real-time preemption, regmap functions cannot be used in the
> implementation of irq_chip since they use spinlocks which may sleep.
>
> Move the setting of the mux for IRQs to an irq_bus_sync_unlock handler
> where we are allowed to sleep.
>
> Signed-off-by: John Keeping <john@...anate.com>
> Reviewed-by: Heiko Stuebner <heiko@...ech.de>
> Tested-by: Heiko Stuebner <heiko@...ech.de>
> ---
> v3: unchanged
> v2: unchanged

Patch applied.

Yours,
Linus Walleij