From: Zou Wei <redacted>

commit 884af72c90016cfccd5717439c86b48702cbf184 upstream.

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

v1-->v2:
   remove the "return IRQ_HANDLED" line

Fixes: 897120d41e7a ("pinctrl: mcp23s08: fix race condition in irq handler")
Reported-by: Hulk Robot <redacted>
Signed-off-by: Zou Wei <redacted>
Link: https://lore.kernel.org/r/1623134048-56051-1-git-send-email-zou_wei@huawei.com (local)
Signed-off-by: Linus Walleij <redacted>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/pinctrl/pinctrl-mcp23s08.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/pinctrl/pinctrl-mcp23s08.c
+++ b/drivers/pinctrl/pinctrl-mcp23s08.c

@@ -353,7 +353,7 @@ static irqreturn_t mcp23s08_irq(int irq,
 
 	if (intf == 0) {
 		/* There is no interrupt pending */
-		return IRQ_HANDLED;
+		goto unlock;
 	}
 
 	if (mcp_read(mcp, MCP_INTCAP, &intcap))