Check for valid config number before completing set interface.

Signed-off-by: Rupesh Gujare <rupesh.guj...@atmel.com>
---
 drivers/staging/ozwpan/ozhcd.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/ozwpan/ozhcd.c b/drivers/staging/ozwpan/ozhcd.c
index ab93b74..83ed64c 100644
--- a/drivers/staging/ozwpan/ozhcd.c
+++ b/drivers/staging/ozwpan/ozhcd.c
@@ -909,7 +909,7 @@ static void oz_hcd_complete_set_interface(struct oz_port 
*port, struct urb *urb,
        struct usb_hcd *hcd = port->ozhcd->hcd;
        int rc = 0;
 
-       if (rcode == 0) {
+       if ((rcode == 0) && (port->config_num > 0)) {
                struct usb_host_config *config;
                struct usb_host_interface *intf;
                oz_dbg(ON, "Set interface %d alt %d\n", if_num, alt);
-- 
1.7.9.5

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