[PNP] minor resource management fixes

This patch fixes a bug in pnp_auto_config_dev in which it wouldn't always report 
allocation failures.  It also corrects the return codes.

drivers/pnp/manager.c

@@ -452,23 +452,19 @@ int pnp_auto_config_dev(struct pnp_dev *dev)
 
 	if (!dev->dependent) {
 		if (pnp_assign_resources(dev, 0))
-			return 1;
-		else
 			return 0;
-	}
-
+	} else {
 		dep = dev->dependent;
 		do {
 			if (pnp_assign_resources(dev, i))
-			return 1;
-
-		/* if this dependent resource failed, try the next one */
+				return 0;
 			dep = dep->next;
 			i++;
 		} while (dep);
+	}
 
 	pnp_err("Unable to assign resources to device %s.", dev->dev.bus_id);
-	return 0;
+	return -EBUSY;
 }
 
 /**
@@ -486,7 +482,7 @@ int pnp_activate_dev(struct pnp_dev *dev)
 	}
 
 	/* ensure resources are allocated */
-	if (!pnp_auto_config_dev(dev))
+	if (pnp_auto_config_dev(dev))
 		return -EBUSY;
 
 	if (!pnp_can_write(dev)) {