hfs: use bdev_nr_sectors instead of open coding it

Use the proper helper to read the block device size.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20211018101130.1838532-16-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/fs/hfs/mdb.c b/fs/hfs/mdb.c
index cdf0ede..5beb826 100644 (file)
--- a/fs/hfs/mdb.c
+++ b/fs/hfs/mdb.c
@@ -36,7 +36,7 @@ static int hfs_get_last_session(struct super_block *sb,
 
        /* default values */
        *start = 0;
-       *size = i_size_read(sb->s_bdev->bd_inode) >> 9;
+       *size = bdev_nr_sectors(sb->s_bdev);
 
        if (HFS_SB(sb)->session >= 0) {
                struct cdrom_tocentry te;