[PATCH] fix for rescan_partitions()

Check for ->bd_invalidate moved from rescan_partitions() to the only caller
that
	a) needs that check and
	b) doesn't do it already.

Fixes the problem with BLKRRPART which doesn't want that check at all...

fs/block_dev.c

@@ -520,7 +520,7 @@ int full_check_disk_change(struct block_device *bdev)
 	if (bdev->bd_contains != bdev)
 		BUG();
 	down(&bdev->bd_sem);
-	if (check_disk_change(bdev)) {
+	if (check_disk_change(bdev) && bdev->bd_invalidated) {
 		rescan_partitions(bdev->bd_disk, bdev);
 		res = 1;
 	}

fs/partitions/check.c

@@ -449,8 +449,6 @@ int rescan_partitions(struct gendisk *disk, struct block_device *bdev)
 	struct parsed_partitions *state;
 	int p, res;
 
-	if (!bdev->bd_invalidated)
-		return 0;
 	if (bdev->bd_part_count)
 		return -EBUSY;
 	res = invalidate_device(dev, 1);