[PATCH] input: cpcap-pwrbutton: Add an error handling

[Tang Bin]

The function cpcap_power_button_probe() does not perform
sufficient error checking after executing platform_get_irq(),
thus fix it.

Signed-off-by: Tang Bin <tangbin@xxxxxxxxxxxxxxxxxxxx>
---
 drivers/input/misc/cpcap-pwrbutton.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/input/misc/cpcap-pwrbutton.c b/drivers/input/misc/cpcap-pwrbutton.c
index 0abef6321..0a1f2e8b4 100644
--- a/drivers/input/misc/cpcap-pwrbutton.c
+++ b/drivers/input/misc/cpcap-pwrbutton.c
@@ -57,6 +57,9 @@ static int cpcap_power_button_probe(struct platform_device *pdev)
 	int irq = platform_get_irq(pdev, 0);
 	int err;
 
+	if (irq < 0)
+		return irq;
+
 	button = devm_kmalloc(&pdev->dev, sizeof(*button), GFP_KERNEL);
 	if (!button)
 		return -ENOMEM;
-- 
2.20.1.windows.1