[PATCH] USB: OHCI: Only use ohci_driver_overrides if they are defined

[Charles Keepax <ckeepax@opensource.wolfsonmicro.com>]

Overrides are optional and many drivers pass NULL, in this case don't
process the overrides so we don't deference a NULL pointer.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
---
 drivers/usb/host/ohci-hcd.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index 21d937a..e26abd5 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -1161,6 +1161,9 @@ void ohci_init_driver(struct hc_driver *drv,
 	/* Copy the generic table to drv and then apply the overrides */
 	*drv = ohci_hc_driver;
 
+	if (!over)
+		return;
+
 	drv->product_desc = over->product_desc;
 	drv->hcd_priv_size += over->extra_priv_size;
 	if (over->reset)
-- 
1.7.2.5