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: 3429e91a661e ("usb: host: xhci: add platform driver support")
Signed-off-by: Sergey Shtylyov <redacted>
---
 drivers/usb/host/xhci-plat.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index c1edcc9b13ce..8f8ad82d90cd 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c

@@ -205,6 +205,8 @@ static int xhci_plat_probe(struct platform_device *pdev)
 	irq = platform_get_irq(pdev, 0);
 	if (irq < 0)
 		return irq;
+	if (!irq)
+		return -EINVAL;
 
 	/*
 	 * sysdev must point to a device that is known to the system firmware

-- 
2.26.3