linux-kernel - [PATCH -next] pinctrl: mcp23s08: Fix missing unlock on error in mcp23s08

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Date:   Mon, 7 Jun 2021 20:44:29 +0800
From:   Zou Wei <zou_wei@...wei.com>
To:     <linus.walleij@...aro.org>, <radim.pavlik@...-biometrics.com>
CC:     <linux-gpio@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Zou Wei <zou_wei@...wei.com>
Subject: [PATCH -next] pinctrl: mcp23s08: Fix missing unlock on error in mcp23s08_irq()

Add the missing unlock before return from function mcp23s08_irq()
in the error handling case.

Fixes: 897120d41e7a ("pinctrl: mcp23s08: fix race condition in irq handler")
Reported-by: Hulk Robot <hulkci@...wei.com>
Signed-off-by: Zou Wei <zou_wei@...wei.com>
---
 drivers/pinctrl/pinctrl-mcp23s08.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/pinctrl/pinctrl-mcp23s08.c b/drivers/pinctrl/pinctrl-mcp23s08.c
index 799d596..e12aa09 100644
--- a/drivers/pinctrl/pinctrl-mcp23s08.c
+++ b/drivers/pinctrl/pinctrl-mcp23s08.c
@@ -353,6 +353,7 @@ static irqreturn_t mcp23s08_irq(int irq, void *data)
 
 	if (intf == 0) {
 		/* There is no interrupt pending */
+		goto unlock;
 		return IRQ_HANDLED;
 	}
 
-- 
2.6.2