max_beb_per1024 shouldn't be negative, and a 0 value will be treated as
the default value.

Signed-off-by: Richard Genoud <[email protected]>
---
 drivers/mtd/ubi/build.c |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/drivers/mtd/ubi/build.c b/drivers/mtd/ubi/build.c
index 58fe53d..ec7311f 100644
--- a/drivers/mtd/ubi/build.c
+++ b/drivers/mtd/ubi/build.c
@@ -855,6 +855,16 @@ 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)
+               return -EINVAL;
+
+       /*
+        * A value of 0 is forced to the default value to keep the same
+        * behavior between ubiattach command and module parameter
+        */
+       if (!max_beb_per1024)
+               max_beb_per1024 = CONFIG_MTD_UBI_BEB_LIMIT;
+
        /*
         * Check if we already have the same MTD device attached.
         *
-- 
1.7.2.5

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