tmiofb: missing NULL pointer checks

Resolves-bug: https://bugzilla.kernel.org/show_bug.cgi?id=44471
Reported-by: <rucsoftsec@gmail.com>
Signed-off-by: NAlan Cox <alan@linux.intel.com>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

drivers/video/tmiofb.c

@@ -694,6 +694,10 @@ static int __devinit tmiofb_probe(struct platform_device *dev)
 		dev_err(&dev->dev, "NULL platform data!\n");
 		return -EINVAL;
 	}
+	if (ccr == NULL || lcr == NULL || vram == NULL || irq < 0) {
+		dev_err(&dev->dev, "missing resources\n");
+		return -EINVAL;
+	}
 
 	info = framebuffer_alloc(sizeof(struct tmiofb_par), &dev->dev);