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fat: use bdev_nr_sectors instead of open coding it

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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/20211018101130.1838532-15-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2021-10-18 12:11:14 +02:00 committed by Jens Axboe
parent 5816e91e4a
commit 9e48243b65
1 changed files with 1 additions and 4 deletions
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5
fs/fat/inode.c
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@ -1536,14 +1536,11 @@ static int fat_read_static_bpb(struct super_block *sb,
struct fat_bios_param_block *bpb) struct fat_bios_param_block *bpb)
{ {
static const char *notdos1x = "This doesn't look like a DOS 1.x volume"; 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; struct fat_floppy_defaults *fdefaults = NULL;
int error = -EINVAL; int error = -EINVAL;
sector_t bd_sects;
unsigned i; 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 */ /* 16-bit DOS 1.x reliably wrote bootstrap short-jmp code */
if (b->ignored[0] != 0xeb || b->ignored[2] != 0x90) { if (b->ignored[0] != 0xeb || b->ignored[2] != 0x90) {
if (!silent) if (!silent)