mtd: tests: fix integer overflow issues

These multiplications are done with 32-bit arithmetic, then converted to
64-bit. We should widen the integers first to prevent overflow. This
could be a problem for large (>4GB) MTD's.

Detected by Coverity.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Cc: Akinobu Mita <akinobu.mita@gmail.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/mtd/tests/readtest.c b/drivers/mtd/tests/readtest.c
index 626e66d0f7e7..a54cf1511114 100644
--- a/drivers/mtd/tests/readtest.c
+++ b/drivers/mtd/tests/readtest.c
@@ -47,7 +47,7 @@ static int pgcnt;
 static int read_eraseblock_by_page(int ebnum)
 {
         int i, ret, err = 0;
-        loff_t addr = ebnum * mtd->erasesize;
+        loff_t addr = (loff_t)ebnum * mtd->erasesize;
         void *buf = iobuf;
         void *oobbuf = iobuf1;