linux-kernel - Re: [PATCH v3 14/15] pinctrl: renesas: pinctrl-rzg2l: Acquire lock in rzg2l_pinctrl_pm_setup

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Message-ID: <a8fa2f27-8c7e-452c-82c7-fb0a0d93b9fe@tuxon.dev>
Date: Mon, 10 Jun 2024 08:57:13 +0300
From: claudiu beznea <claudiu.beznea@...on.dev>
To: Prabhakar <prabhakar.csengg@...il.com>,
 Geert Uytterhoeven <geert+renesas@...der.be>,
 Linus Walleij <linus.walleij@...aro.org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Magnus Damm <magnus.damm@...il.com>
Cc: linux-renesas-soc@...r.kernel.org, linux-gpio@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 Biju Das <biju.das.jz@...renesas.com>,
 Claudiu Beznea <claudiu.beznea.uj@...renesas.com>,
 Fabrizio Castro <fabrizio.castro.jz@...esas.com>,
 Paul Barker <paul.barker.ct@...renesas.com>,
 Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: Re: [PATCH v3 14/15] pinctrl: renesas: pinctrl-rzg2l: Acquire lock in
 rzg2l_pinctrl_pm_setup_pfc()



On 30.05.2024 20:38, Prabhakar wrote:
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> 
> To keep consistency with rzg2l_pinctrl_set_pfc_mode(), acquire the lock
> in rzg2l_pinctrl_pm_setup_pfc() during PFC setup.
> 
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>

Tested-by: Claudiu Beznea <claudiu.beznea.uj@...renesas.com> # on RZ/G3S

> ---
> v2->v3
> - New patch
> ---
>  drivers/pinctrl/renesas/pinctrl-rzg2l.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/pinctrl/renesas/pinctrl-rzg2l.c b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
> index 1cbf97d416bf..2be088bbbd9f 100644
> --- a/drivers/pinctrl/renesas/pinctrl-rzg2l.c
> +++ b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
> @@ -2541,7 +2541,9 @@ static void rzg2l_pinctrl_pm_setup_dedicated_regs(struct rzg2l_pinctrl *pctrl, b
>  static void rzg2l_pinctrl_pm_setup_pfc(struct rzg2l_pinctrl *pctrl)
>  {
>  	u32 nports = pctrl->data->n_port_pins / RZG2L_PINS_PER_PORT;
> +	unsigned long flags;
>  
> +	spin_lock_irqsave(&pctrl->lock, flags);
>  	pctrl->data->pwpr_pfc_lock_unlock(pctrl, false);
>  
>  	/* Restore port registers. */
> @@ -2586,6 +2588,7 @@ static void rzg2l_pinctrl_pm_setup_pfc(struct rzg2l_pinctrl *pctrl)
>  	}
>  
>  	pctrl->data->pwpr_pfc_lock_unlock(pctrl, true);
> +	spin_unlock_irqrestore(&pctrl->lock, flags);
>  }
>  
>  static int rzg2l_pinctrl_suspend_noirq(struct device *dev)