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From: Claudiu <claudiu.beznea@tuxon.dev>
To: geert+renesas@glider.be,
	linus.walleij@linaro.org,
	didi.debian@cknow.org,
	efault@gmx.de
Cc: linux-renesas-soc@vger.kernel.org,
	linux-gpio@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	claudiu.beznea@tuxon.dev,
	linux-rt-users@vger.kernel.org,
	Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Subject: [PATCH v2] pinctrl: renesas: rzg2l: Use spin_{lock,unlock}_irq{save,restore}
Date: Wed, 22 May 2024 08:54:21 +0300
Message-Id: <20240522055421.2842689-1-claudiu.beznea.uj@bp.renesas.com>
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From: Claudiu Beznea <claudiu.beznea.uj@bp.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: 02cd2d3be1c3 ("pinctrl: renesas: rzg2l: Configure the interrupt type on resume")
Reported-by: Diederik de Haas <didi.debian@cknow.org>
Closes: https://lore.kernel.org/all/131999629.KQPSlr0Zke@bagend
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
---

Changes in v2:
- use proper commit id in "Fixes" section
- s/use/Use in patch title

 drivers/pinctrl/renesas/pinctrl-rzg2l.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/pinctrl/renesas/pinctrl-rzg2l.c b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
index 20425afc6b33..78f947a8e26e 100644
--- a/drivers/pinctrl/renesas/pinctrl-rzg2l.c
+++ b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
@@ -2069,11 +2069,11 @@ static void rzg2l_gpio_irq_restore(struct rzg2l_pinctrl *pctrl)
 		 * This has to be atomically executed to protect against a concurrent
 		 * interrupt.
 		 */
-		raw_spin_lock_irqsave(&pctrl->lock.rlock, flags);
+		spin_lock_irqsave(&pctrl->lock, flags);
 		ret = rzg2l_gpio_irq_set_type(data, irqd_get_trigger_type(data));
 		if (!ret && !irqd_irq_disabled(data))
 			rzg2l_gpio_irq_enable(data);
-		raw_spin_unlock_irqrestore(&pctrl->lock.rlock, flags);
+		spin_unlock_irqrestore(&pctrl->lock, flags);
 
 		if (ret)
 			dev_crit(pctrl->dev, "Failed to set IRQ type for virq=%u\n", virq);
-- 
2.39.2