[PATCH 4.4 055/133] usb: phy: tahvo: add IRQ check

[Greg Kroah-Hartman]

From: Sergey Shtylyov <s.shtylyov@xxxxxx>

[ Upstream commit 0d45a1373e669880b8beaecc8765f44cb0241e47 ]

The driver neglects to check the result of platform_get_irq()'s call and
blithely passes the negative error codes to request_threaded_irq() (which
takes *unsigned* IRQ #), causing it to fail with -EINVAL, overriding an
original error code.  Stop calling request_threaded_irq() with the invalid
IRQ #s.

Fixes: 9ba96ae5074c ("usb: omap1: Tahvo USB transceiver driver")
Acked-by: Felipe Balbi <balbi@xxxxxxxxxx>
Signed-off-by: Sergey Shtylyov <s.shtylyov@xxxxxx>
Link: https://lore.kernel.org/r/8280d6a4-8e9a-7cfe-1aa9-db586dc9afdf@xxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/usb/phy/phy-tahvo.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/phy/phy-tahvo.c b/drivers/usb/phy/phy-tahvo.c
index 335a1ef35224..ec86eedd789b 100644
--- a/drivers/usb/phy/phy-tahvo.c
+++ b/drivers/usb/phy/phy-tahvo.c
@@ -404,7 +404,9 @@ static int tahvo_usb_probe(struct platform_device *pdev)
 
 	dev_set_drvdata(&pdev->dev, tu);
 
-	tu->irq = platform_get_irq(pdev, 0);
+	tu->irq = ret = platform_get_irq(pdev, 0);
+	if (ret < 0)
+		return ret;
 	ret = request_threaded_irq(tu->irq, NULL, tahvo_usb_vbus_interrupt,
 				   IRQF_ONESHOT,
 				   "tahvo-vbus", tu);
-- 
2.30.2