Commit 9e48243b authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Jens Axboe
Browse files

fat: use bdev_nr_sectors instead of open coding it 



Use the proper helper to read the block device size.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarKees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20211018101130.1838532-15-hch@lst.de


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 5816e91e

fs/fat/inode.c

+1 −4
Original line number Diff line number Diff line
@@ -1536,14 +1536,11 @@ static int fat_read_static_bpb(struct super_block *sb, 
	struct fat_bios_param_block *bpb)

{

	static const char *notdos1x = "This doesn't look like a DOS 1.x volume";



	sector_t bd_sects = bdev_nr_sectors(sb->s_bdev);

	struct fat_floppy_defaults *fdefaults = NULL;

	int error = -EINVAL;

	sector_t bd_sects;

	unsigned i;



	bd_sects = i_size_read(sb->s_bdev->bd_inode) / SECTOR_SIZE;



	/* 16-bit DOS 1.x reliably wrote bootstrap short-jmp code */

	if (b->ignored[0] != 0xeb || b->ignored[2] != 0x90) {

		if (!silent)