sound/es1688: add pedantic range checks

Smatch complains that if (dev == SNDRV_CARDS) we're one past the end of the array. That's unlikely to happen in real life, I suppose.

Also smatch complains about "strcpy(card->shortname, pcm->name);" The "pcm->name" buffer is 80 characters and "card->shortname" is 32 characters. If you follow the call paths it turns out we never actually use more than 16 characters so it's not a problem. But anyway, let's make it easy for people auditing this in the future.

Signed-off-by Dan Carpenter <[email protected]>

sound/isa/es1688/es1688.c +7 -4

index fdcce31..0cde813 100644
@@ -149,10 +149,11 @@ static int __devinit snd_es1688_probe(struct snd_card *card, unsigned int n)
 	if (error < 0)
 		return error;
 
-	strcpy(card->driver, "ES1688");
-	strcpy(card->shortname, pcm->name);
-	sprintf(card->longname, "%s at 0x%lx, irq %i, dma %i", pcm->name,
-		chip->port, chip->irq, chip->dma8);
+	strlcpy(card->driver, "ES1688", sizeof(card->driver));
+	strlcpy(card->shortname, pcm->name, sizeof(card->shortname));
+	snprintf(card->longname, sizeof(card->longname),
+		"%s at 0x%lx, irq %i, dma %i", pcm->name, chip->port,
+		 chip->irq, chip->dma8);
 
 	if (fm_port[n] == SNDRV_AUTO_PORT)
 		fm_port[n] = port[n];	/* share the same port */

@@ -271,6 +272,8 @@ static int __devinit snd_es968_pnp_detect(struct pnp_card_link *pcard,
 		if (enable[dev] && isapnp[dev])
 			break;
 	}
+	if (dev == SNDRV_CARDS)
+		return -ENODEV;
 
 	error = snd_card_create(index[dev], id[dev], THIS_MODULE,
 				sizeof(struct snd_es1688), &card);