linux-kernel - [PATCH v2] pinctrl: fix error check return value of irq_of_parse_and

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Date:   Sun, 24 Apr 2022 03:14:30 +0000
From:   cgel.zte@...il.com
To:     cgel.zte@...il.com
Cc:     Damien.Horsley@...tec.com, abrestic@...omium.org,
        ezequiel.garcia@...tec.com, govindraj.raja@...tec.com,
        linus.walleij@...aro.org, linux-gpio@...r.kernel.org,
        linux-kernel@...r.kernel.org, lv.ruyi@....com.cn,
        Zeal Robot <zealci@....com.cn>
Subject: [PATCH v2] pinctrl: fix error check return value of irq_of_parse_and_map()

From: Lv Ruyi <lv.ruyi@....com.cn>

The irq_of_parse_and_map() function returns 0 on failure, and does not
return an negative value.

Fixes: cefc03e5995e ("pinctrl: Add Pistachio SoC pin control driver")
Reported-by: Zeal Robot <zealci@....com.cn>
Signed-off-by: Lv Ruyi <lv.ruyi@....com.cn>
---
v2: don't print irq, and return -EINVAL rather than 0
---
 drivers/pinctrl/pinctrl-pistachio.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/pinctrl/pinctrl-pistachio.c b/drivers/pinctrl/pinctrl-pistachio.c
index 8d271c6b0ca4..5de691c630b4 100644
--- a/drivers/pinctrl/pinctrl-pistachio.c
+++ b/drivers/pinctrl/pinctrl-pistachio.c
@@ -1374,10 +1374,10 @@ static int pistachio_gpio_register(struct pistachio_pinctrl *pctl)
 		}
 
 		irq = irq_of_parse_and_map(child, 0);
-		if (irq < 0) {
-			dev_err(pctl->dev, "No IRQ for bank %u: %d\n", i, irq);
+		if (!irq) {
+			dev_err(pctl->dev, "No IRQ for bank %u\n", i);
 			of_node_put(child);
-			ret = irq;
+			ret = -EINVAL;
 			goto err;
 		}
 
-- 
2.25.1