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| author | Richard Genoud <richard.genoud@gmail.com> | 2012-08-20 20:00:13 +0400 |
|---|---|---|
| committer | Artem Bityutskiy <artem.bityutskiy@linux.intel.com> | 2012-09-04 10:39:01 +0400 |
| commit | d2f588f9340ed23dfb6cda08b8a1917ef3e8527c (patch) | |
| tree | 162ea3e7fb652a79cf439f65b791a6287a9e4ce5 /drivers/mtd | |
| parent | 256334c3191af9d9e520082db9beb75ff801d86c (diff) | |
| download | linux-d2f588f9340ed23dfb6cda08b8a1917ef3e8527c.tar.xz | |
UBI: check max_beb_per1024 value in ubi_attach_mtd_dev
max_beb_per1024 shouldn't be negative, and a 0 value will be treated as
the default value. For the upper bound, 768/1024 should be enough.
Signed-off-by: Richard Genoud <richard.genoud@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/ubi/build.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/mtd/ubi/build.c b/drivers/mtd/ubi/build.c index 8a4eb7c3e0f4..3700bf77b0b8 100644 --- a/drivers/mtd/ubi/build.c +++ b/drivers/mtd/ubi/build.c @@ -49,6 +49,9 @@ /* Maximum number of comma-separated items in the 'mtd=' parameter */ #define MTD_PARAM_MAX_COUNT 2 +/* Maximum value for the number of bad PEBs per 1024 PEBs */ +#define MAX_MTD_UBI_BEB_LIMIT 768 + #ifdef CONFIG_MTD_UBI_MODULE #define ubi_is_module() 1 #else @@ -852,6 +855,12 @@ int ubi_attach_mtd_dev(struct mtd_info *mtd, int ubi_num, struct ubi_device *ubi; int i, err, ref = 0; + if (max_beb_per1024 < 0 || max_beb_per1024 > MAX_MTD_UBI_BEB_LIMIT) + return -EINVAL; + + if (!max_beb_per1024) + max_beb_per1024 = CONFIG_MTD_UBI_BEB_LIMIT; + /* * Check if we already have the same MTD device attached. * |