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: fb5f1834c322 ("usb: ohci-at91: fix irq and iomem resource retrieval")
Signed-off-by: Sergey Shtylyov <redacted>
---
 drivers/usb/host/ohci-at91.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/usb/host/ohci-at91.c b/drivers/usb/host/ohci-at91.c
index a24aea3d2759..6a7276a730d1 100644
--- a/drivers/usb/host/ohci-at91.c
+++ b/drivers/usb/host/ohci-at91.c

@@ -181,6 +181,8 @@ static int usb_hcd_at91_probe(const struct hc_driver *driver,
 		dev_dbg(dev, "hcd probe: missing irq resource\n");
 		return irq;
 	}
+	if (!irq)
+		return -EINVAL;
 
 	hcd = usb_create_hcd(driver, dev, "at91");
 	if (!hcd)

-- 
2.26.3


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