loop: Use invalidate_disk() helper to invalidate gendisk

Use invalidate_disk() helper to simplify the code for gendisk
invalidation.

Signed-off-by: Xie Yongji <xieyongji@bytedance.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20210922123711.187-3-xieyongji@bytedance.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 7bf4686..eab6906 100644 (file)
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -1395,11 +1395,7 @@ static int __loop_clr_fd(struct loop_device *lo, bool release)
        blk_queue_logical_block_size(lo->lo_queue, 512);
        blk_queue_physical_block_size(lo->lo_queue, 512);
        blk_queue_io_min(lo->lo_queue, 512);
-       if (bdev) {
-               invalidate_bdev(bdev);
-               bdev->bd_inode->i_mapping->wb_err = 0;
-       }
-       set_capacity(lo->lo_disk, 0);
+       invalidate_disk(lo->lo_disk);
        loop_sysfs_exit(lo);
        if (bdev) {
                /* let user-space know about this change */