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UBI: add an helper to check lnum validity

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ubi_leb_valid() is here to replace the
lnum < 0 || lnum >= vol->reserved_pebs checks.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Boris Brezillon 2016-09-16 16:59:22 +02:00 committed by Richard Weinberger
parent 2d78aee426
commit 9a5f09ac0a
3 changed files with 13 additions and 8 deletions
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4
drivers/mtd/ubi/cdev.c
View file

@ -454,7 +454,7 @@ static long vol_cdev_ioctl(struct file *file, unsigned int cmd,
/* Validate the request */
err = -EINVAL;
if (req.lnum < 0 || req.lnum >= vol->reserved_pebs ||
if (!ubi_leb_valid(vol, req.lnum) ||
req.bytes < 0 || req.bytes > vol->usable_leb_size)
break;
@ -485,7 +485,7 @@ static long vol_cdev_ioctl(struct file *file, unsigned int cmd,
break;
}
if (lnum < 0 || lnum >= vol->reserved_pebs) {
if (!ubi_leb_valid(vol, lnum)) {
err = -EINVAL;
break;
}

12
drivers/mtd/ubi/kapi.c
View file

@ -538,7 +538,7 @@ int ubi_leb_write(struct ubi_volume_desc *desc, int lnum, const void *buf,
if (desc->mode == UBI_READONLY || vol->vol_type == UBI_STATIC_VOLUME)
return -EROFS;
if (lnum < 0 || lnum >= vol->reserved_pebs || offset < 0 || len < 0 ||
if (!ubi_leb_valid(vol, lnum) || offset < 0 || len < 0 ||
offset + len > vol->usable_leb_size ||
offset & (ubi->min_io_size - 1) || len & (ubi->min_io_size - 1))
return -EINVAL;
@ -583,7 +583,7 @@ int ubi_leb_change(struct ubi_volume_desc *desc, int lnum, const void *buf,
if (desc->mode == UBI_READONLY || vol->vol_type == UBI_STATIC_VOLUME)
return -EROFS;
if (lnum < 0 || lnum >= vol->reserved_pebs || len < 0 ||
if (!ubi_leb_valid(vol, lnum) || len < 0 ||
len > vol->usable_leb_size || len & (ubi->min_io_size - 1))
return -EINVAL;
@ -620,7 +620,7 @@ int ubi_leb_erase(struct ubi_volume_desc *desc, int lnum)
if (desc->mode == UBI_READONLY || vol->vol_type == UBI_STATIC_VOLUME)
return -EROFS;
if (lnum < 0 || lnum >= vol->reserved_pebs)
if (!ubi_leb_valid(vol, lnum))
return -EINVAL;
if (vol->upd_marker)
@ -680,7 +680,7 @@ int ubi_leb_unmap(struct ubi_volume_desc *desc, int lnum)
if (desc->mode == UBI_READONLY || vol->vol_type == UBI_STATIC_VOLUME)
return -EROFS;
if (lnum < 0 || lnum >= vol->reserved_pebs)
if (!ubi_leb_valid(vol, lnum))
return -EINVAL;
if (vol->upd_marker)
@ -716,7 +716,7 @@ int ubi_leb_map(struct ubi_volume_desc *desc, int lnum)
if (desc->mode == UBI_READONLY || vol->vol_type == UBI_STATIC_VOLUME)
return -EROFS;
if (lnum < 0 || lnum >= vol->reserved_pebs)
if (!ubi_leb_valid(vol, lnum))
return -EINVAL;
if (vol->upd_marker)
@ -751,7 +751,7 @@ int ubi_is_mapped(struct ubi_volume_desc *desc, int lnum)
dbg_gen("test LEB %d:%d", vol->vol_id, lnum);
if (lnum < 0 || lnum >= vol->reserved_pebs)
if (!ubi_leb_valid(vol, lnum))
return -EINVAL;
if (vol->upd_marker)

5
drivers/mtd/ubi/ubi.h
View file

@ -843,6 +843,11 @@ void ubi_update_reserved(struct ubi_device *ubi);
void ubi_calculate_reserved(struct ubi_device *ubi);
int ubi_check_pattern(const void *buf, uint8_t patt, int size);
static inline bool ubi_leb_valid(struct ubi_volume *vol, int lnum)
{
return lnum >= 0 && lnum < vol->reserved_pebs;
}
/* eba.c */
int ubi_eba_unmap_leb(struct ubi_device *ubi, struct ubi_volume *vol,
int lnum);