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: c508f41da078 ("xhci: hisilicon: support HiSilicon STB xHCI host controller")
Signed-off-by: Sergey Shtylyov <redacted>
---
 drivers/usb/host/xhci-histb.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/usb/host/xhci-histb.c b/drivers/usb/host/xhci-histb.c
index 08369857686e..581952dcefe8 100644
--- a/drivers/usb/host/xhci-histb.c
+++ b/drivers/usb/host/xhci-histb.c

@@ -218,6 +218,8 @@ static int xhci_histb_probe(struct platform_device *pdev)
 	irq = platform_get_irq(pdev, 0);
 	if (irq < 0)
 		return irq;
+	if (!irq)
+		return -EINVAL;
 
 	histb->ctrl = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
 	if (IS_ERR(histb->ctrl))

-- 
2.26.3