linux-kernel - Re: [PATCH] pinctrl: renesas: rzg2l: use spin_{lock,unlock}

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Message-ID: <20240521142259.Pm56N8P-@linutronix.de>
Date: Tue, 21 May 2024 16:22:59 +0200
From: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To: Claudiu <claudiu.beznea@...on.dev>
Cc: geert+renesas@...der.be, linus.walleij@...aro.org,
	didi.debian@...ow.org, efault@....de,
	linux-renesas-soc@...r.kernel.org, linux-gpio@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-rt-users@...r.kernel.org,
	Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
Subject: Re: [PATCH] pinctrl: renesas: rzg2l: use
 spin_{lock,unlock}_irq{save,restore}

On 2024-05-20 10:20:33 [+0300], Claudiu wrote:
> From: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
> 
> On PREEMPT_RT kernels the spinlock_t maps to an rtmutex. Using
> raw_spin_lock_irqsave()/raw_spin_unlock_irqrestore() on
> &pctrl->lock.rlock breaks the PREEMPT_RT builds. To fix this use
> spin_lock_irqsave()/spin_unlock_irqrestore() on &pctrl->lock.
> 
> Fixes: e1fd1f9f457b ("pinctrl: renesas: rzg2l: Configure the interrupt type on resume")

02cd2d3be1c31 ("pinctrl: renesas: rzg2l: Configure the interrupt type on resume")

> Reported-by: Diederik de Haas <didi.debian@...ow.org>
> Closes: https://lore.kernel.org/all/131999629.KQPSlr0Zke@bagend
> Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>

Sebastian