[PATCH] usb: typec: Fix unchecked return value

[Gustavo A. R. Silva]

Currently there is no check on platform_get_irq() return value
in case it fails, hence never actually reporting any errors and
causing unexpected behavior when using such value as argument
for function regmap_irq_get_virq().

Fix this by adding a proper check, a message error and return
*irq* in case platform_get_irq() fails.

Addresses-Coverity-ID: 1443899 ("Improper use of negative value")
Fixes: d2061f9cc32d ("usb: typec: add driver for Intel Whiskey Cove PMIC USB Type-C PHY")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Gustavo A. R. Silva <gustavo@xxxxxxxxxxxxxx>
---
 drivers/usb/typec/tcpm/wcove.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/typec/tcpm/wcove.c b/drivers/usb/typec/tcpm/wcove.c
index 423208e19383..6770afd40765 100644
--- a/drivers/usb/typec/tcpm/wcove.c
+++ b/drivers/usb/typec/tcpm/wcove.c
@@ -615,8 +615,13 @@ static int wcove_typec_probe(struct platform_device *pdev)
 	wcove->dev = &pdev->dev;
 	wcove->regmap = pmic->regmap;
 
-	irq = regmap_irq_get_virq(pmic->irq_chip_data_chgr,
-				  platform_get_irq(pdev, 0));
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0) {
+		dev_err(&pdev->dev, "Failed to get IRQ: %d\n", irq);
+		return irq;
+	}
+
+	irq = regmap_irq_get_virq(pmic->irq_chip_data_chgr, irq);
 	if (irq < 0)
 		return irq;
 
-- 
2.21.0