linux-kernel - [PATCH v1 1/1] pinctrl: pistachio: Correct the fwnode_irq

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Message-Id: <20220908094323.31965-1-andriy.shevchenko@linux.intel.com>
Date:   Thu,  8 Sep 2022 12:43:23 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Linus Walleij <linus.walleij@...aro.org>
Subject: [PATCH v1 1/1] pinctrl: pistachio: Correct the fwnode_irq_get() return value check

fwnode_irq_get() may return all possible signed values, such as Linux
error code or 0. Fix the code to handle this properly.

Fixes: 1074e1d23a5c ("pinctrl: pistachio: Switch to use fwnode instead of")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/pinctrl/pinctrl-pistachio.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/pinctrl/pinctrl-pistachio.c b/drivers/pinctrl/pinctrl-pistachio.c
index 940ed3fff63a..7ca4ecb6eb8d 100644
--- a/drivers/pinctrl/pinctrl-pistachio.c
+++ b/drivers/pinctrl/pinctrl-pistachio.c
@@ -1374,8 +1374,14 @@ static int pistachio_gpio_register(struct pistachio_pinctrl *pctl)
 
 		ret = fwnode_irq_get(child, 0);
 		if (ret < 0) {
+			fwnode_handle_put(child);
+			dev_err(pctl->dev, "Failed to retrieve IRQ for bank %u\n", i);
+			goto err;
+		}
+		if (!ret) {
 			fwnode_handle_put(child);
 			dev_err(pctl->dev, "No IRQ for bank %u\n", i);
+			ret = -EINVAL;
 			goto err;
 		}
 		irq = ret;
-- 
2.35.1