If platform_get_irq() returns IRQ0 (considered invalid according to Linus)
the driver blithely passes it to usb_add_hcd() that treats IRQ0 as no IRQ
at all. Deny IRQ0 right away, returning -EINVAL from the probe() method...

Fixes: e84fce0f8837 ("usb: xhci: Add NVIDIA Tegra XUSB controller driver")
Signed-off-by: Sergey Shtylyov <redacted>
---
 drivers/usb/host/xhci-tegra.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/usb/host/xhci-tegra.c b/drivers/usb/host/xhci-tegra.c
index 1bf494b649bd..7151b1d4f876 100644
--- a/drivers/usb/host/xhci-tegra.c
+++ b/drivers/usb/host/xhci-tegra.c

@@ -1439,6 +1439,8 @@ static int tegra_xusb_probe(struct platform_device *pdev)
 	tegra->xhci_irq = platform_get_irq(pdev, 0);
 	if (tegra->xhci_irq < 0)
 		return tegra->xhci_irq;
+	if (!tegra->xhci_irq)
+		return -ENIVAL;
 
 	tegra->mbox_irq = platform_get_irq(pdev, 1);
 	if (tegra->mbox_irq < 0)

-- 
2.26.3