mtd: mtdswap: fix integer overflow

Caught by Coverity.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>

diff --git a/drivers/mtd/mtdswap.c b/drivers/mtd/mtdswap.c
index 0ec96cd..48cf6f9 100644 (file)
--- a/drivers/mtd/mtdswap.c
+++ b/drivers/mtd/mtdswap.c
@@ -1474,7 +1474,7 @@ static void mtdswap_add_mtd(struct mtd_blktrans_ops *tr, struct mtd_info *mtd)
        }
 
        eblocks = mtd_div_by_eb(use_size, mtd);
-       use_size = eblocks * mtd->erasesize;
+       use_size = (uint64_t)eblocks * mtd->erasesize;
        bad_blocks = mtdswap_badblocks(mtd, use_size);
        eavailable = eblocks - bad_blocks;