linux-kernel - [PATCH v1 1/3] gpio: ep93xx: Fix port F hwirq numbers in handler

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Date:   Wed, 25 Jan 2023 11:30:24 +0300
From:   Nikita Shubin <nikita.shubin@...uefel.me>
To:     linux-gpio@...r.kernel.org
Cc:     Nikita Shubin <nikita.shubin@...uefel.me>,
        Hartley Sweeten <hsweeten@...ionengravers.com>,
        Alexander Sverdlin <alexander.sverdlin@...il.com>,
        Russell King <linux@...linux.org.uk>,
        Lukasz Majewski <lukma@...x.de>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Arnd Bergmann <arnd@...db.de>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH v1 1/3] gpio: ep93xx: Fix port F hwirq numbers in handler

Fix wrong translation of irq numbers in port F handler, as ep93xx hwirqs
increased by 1, we should simply decrease them by 1 in translation.

Fixes: 482c27273f52 ("ARM: ep93xx: renumber interrupts")
Signed-off-by: Nikita Shubin <nikita.shubin@...uefel.me>
---
 drivers/gpio/gpio-ep93xx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpio/gpio-ep93xx.c b/drivers/gpio/gpio-ep93xx.c
index 2e1779709113..7edcdc575080 100644
--- a/drivers/gpio/gpio-ep93xx.c
+++ b/drivers/gpio/gpio-ep93xx.c
@@ -148,7 +148,7 @@ static void ep93xx_gpio_f_irq_handler(struct irq_desc *desc)
 	 */
 	struct irq_chip *irqchip = irq_desc_get_chip(desc);
 	unsigned int irq = irq_desc_get_irq(desc);
-	int port_f_idx = ((irq + 1) & 7) ^ 4; /* {19..22,47..50} -> {0..7} */
+	int port_f_idx = (irq & 7) ^ 4; /* {20..23,48..51} -> {0..7} */
 	int gpio_irq = EP93XX_GPIO_F_IRQ_BASE + port_f_idx;
 
 	chained_irq_enter(irqchip, desc);
-- 
2.37.4