[PATCH v2 17/22] usb: host: ohci-st: 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: d115837259ad ("usb: host: ohci-st: Add OHCI driver support for ST STB devices")
Signed-off-by: Sergey Shtylyov <s.shtylyov at omp.ru>
Acked-by: Alan Stern <stern at rowland.harvard.edu>
---
Changes in version 2:
- added Alan's ACK.

 drivers/usb/host/ohci-st.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/usb/host/ohci-st.c b/drivers/usb/host/ohci-st.c
index ac796ccd93ef..b9200071ce6c 100644
--- a/drivers/usb/host/ohci-st.c
+++ b/drivers/usb/host/ohci-st.c
@@ -140,6 +140,8 @@ static int st_ohci_platform_probe(struct platform_device *dev)
 	irq = platform_get_irq(dev, 0);
 	if (irq < 0)
 		return irq;
+	if (!irq)
+		return -EINVAL;
 
 	res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
 	if (!res_mem) {
-- 
2.26.3