[PATCH] aoe 5/12: don't try to free null bufpool

don't try to free null bufpool

Signed-off-by: Ed L. Cashin <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/block/aoe/aoedev.c

···
 		put_disk(d->gd);
 	}
 	kfree(d->frames);
-	mempool_destroy(d->bufpool);
+	if (d->bufpool)
+		mempool_destroy(d->bufpool);
 	kfree(d);
 }