USB: OHCI: ohci_init_driver(): sanity check overrides

Check for non-NULL overrides before dereferencing since platforms may
pass in NULL overrides.

Signed-off-by: Kevin Hilman <khilman@linaro.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 6 insertions, 4 deletions

diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index 21d937a590e8..8ada13f8dde2 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -1161,10 +1161,12 @@ void ohci_init_driver(struct hc_driver *drv,
         /* Copy the generic table to drv and then apply the overrides */
         *drv = ohci_hc_driver;
 
-        drv->product_desc = over->product_desc;
-        drv->hcd_priv_size += over->extra_priv_size;
-        if (over->reset)
-                drv->reset = over->reset;
+        if (over) {
+                drv->product_desc = over->product_desc;
+                drv->hcd_priv_size += over->extra_priv_size;
+                if (over->reset)
+                        drv->reset = over->reset;
+        }
 }
 EXPORT_SYMBOL_GPL(ohci_init_driver);