V4L/DVB (3741): Budget-core doesn't check if register adapter fails

If you have more than DVB_MAX_ADAPTERS in your machine, this causes an oops.
Signed-off-by: Andrew de Quincey <adq_dvb@lidskialf.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/dvb/ttpci/budget-core.c

@@ -400,7 +400,9 @@ int ttpci_budget_init(struct budget *budget, struct saa7146_dev *dev,
 		budget->dev->name, budget->buffer_width, budget->buffer_height);
 	printk("%s: dma buffer size %u\n", budget->dev->name, budget->buffer_size);
 
-	dvb_register_adapter(&budget->dvb_adapter, budget->card->name, owner);
+	if ((ret = dvb_register_adapter(&budget->dvb_adapter, budget->card->name, owner)) < 0) {
+		return ret;
+	}
 
 	/* set dd1 stream a & b */
 	saa7146_write(dev, DD1_STREAM_B, 0x00000000);