Input: twl4030_keypad - avoid potential NULL-pointer dereference

Signed-off-by: Shubhrajyoti D <a0393217@india.ti.com>
Acked-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

drivers/input/keyboard/twl4030_keypad.c

@@ -338,7 +338,7 @@ static int __devinit twl4030_kp_probe(struct platform_device *pdev)
 	u8 reg;
 	int error;
 
-	if (!pdata || !pdata->rows || !pdata->cols ||
+	if (!pdata || !pdata->rows || !pdata->cols || !pdata->keymap_data ||
 	    pdata->rows > TWL4030_MAX_ROWS || pdata->cols > TWL4030_MAX_COLS) {
 		dev_err(&pdev->dev, "Invalid platform_data\n");
 		return -EINVAL;