[U-Boot] [PATCH] Correct drv_usb_kbd_init function

[Ryan CHEN]

The patch is that check if usb_get_dev_index() function return valid pointer.
If valid, continue. Otherwise return -1.

Signed-off-by: Ryan Chen <ryan.chen at st.com>

---
 common/usb_kbd.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/common/usb_kbd.c b/common/usb_kbd.c
index c876495..880e616 100644
--- a/common/usb_kbd.c
+++ b/common/usb_kbd.c
@@ -164,6 +164,8 @@ int drv_usb_kbd_init(void)
 	/* scan all USB Devices */
 	for(i=0;i<USB_MAX_DEVICE;i++) {
 		dev=usb_get_dev_index(i); /* get device */
+		if(dev == NULL)
+			return -1;
 		if(dev->devnum!=-1) {
 			if(usb_kbd_probe(dev,0)==1) { /* Ok, we found a keyboard */
 				/* check, if it is already registered */
-- 
1.6.0.rc1