[PATCH v3 1/2] usb: host: ohci-tmio: add IRQ check

The driver neglects to check the  result of platform_get_irq()'s call and
blithely passes the negative error codes to usb_add_hcd() (which takes
*unsigned* IRQ #), causing request_irq() that it calls to fail with
-EINVAL, overriding an original error code. Stop calling usb_add_hcd()
with the invalid IRQ #s.

Fixes: 78c73414f4f6 ("USB: ohci: add support for tmio-ohci cell")
Signed-off-by: Sergey Shtylyov <redacted>

---
Changes in version 3:
- move the IRQ check higher in ohci_hcd_tmio_drv_probe(), to be closer to
  platfrom_get_irq()'s call.

 drivers/usb/host/ohci-tmio.c |    3 +++
 1 file changed, 3 insertions(+)

Index: usb/drivers/usb/host/ohci-tmio.c
===================================================================

--- usb.orig/drivers/usb/host/ohci-tmio.c
+++ usb/drivers/usb/host/ohci-tmio.c

@@ -202,6 +202,9 @@ static int ohci_hcd_tmio_drv_probe(struc
 	if (!cell)
 		return -EINVAL;
 
+	if (irq < 0)
+		return irq;
+
 	hcd = usb_create_hcd(&ohci_tmio_hc_driver, &dev->dev, dev_name(&dev->dev));
 	if (!hcd) {
 		ret = -ENOMEM;