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: c8c38de9d800 ("USB host: Adding USB ehci & ohci support for spear platform")
Signed-off-by: Sergey Shtylyov <redacted>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
---
Changes in version 2:
- added Alan's ACK.

 drivers/usb/host/ehci-spear.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/usb/host/ehci-spear.c b/drivers/usb/host/ehci-spear.c
index 3694e450a11a..f4a5896900dc 100644
--- a/drivers/usb/host/ehci-spear.c
+++ b/drivers/usb/host/ehci-spear.c

@@ -70,6 +70,10 @@ static int spear_ehci_hcd_drv_probe(struct platform_device *pdev)
 		retval = irq;
 		goto fail;
 	}
+	if (!irq) {
+		retval = -EINVAL;
+		goto fail;
+	}
 
 	/*
 	 * Right now device-tree probed devices don't get dma_mask set.

-- 
2.26.3