[PATCH v2 03/22] usb: host: ehci-npcm7xx: deny IRQ0

[Sergey Shtylyov]

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: df44831ee2dd ("USB host: Add USB ehci support for nuvoton npcm7xx platform")
Signed-off-by: Sergey Shtylyov <s.shtylyov at omp.ru>
Acked-by: Alan Stern <stern at rowland.harvard.edu>
Reviewed-by: Avi Fishman <avifishman70 at gmail.com>
---
Changes in version 2:
- added Alan's ACK and also Avi's tag.

 drivers/usb/host/ehci-npcm7xx.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/usb/host/ehci-npcm7xx.c b/drivers/usb/host/ehci-npcm7xx.c
index 6b5a7a873e01..aff3d906ced5 100644
--- a/drivers/usb/host/ehci-npcm7xx.c
+++ b/drivers/usb/host/ehci-npcm7xx.c
@@ -114,6 +114,10 @@ static int npcm7xx_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