[PATCH 5.12 236/242] pinctrl: mcp23s08: Fix missing unlock on error in mcp23s08_irq()

Greg Kroah-Hartman
2021-07-15T19:21:04Z

From: Zou Wei <zou_wei@huawei.com>

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 <hulkci@huawei.com>
Signed-off-by: Zou Wei <zou_wei@huawei.com>
Link: https://lore.kernel.org/r/1623134048-56051-1-git-send-email-zou_wei@huawei.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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))