[PATCH 09/18] mtd-cfi_cmdset_0002: Use kmalloc_array() in cfi_amdstd_setup()

SF Markus Elfring
2017-01-11T20:44:32Z

Date: Wed, 11 Jan 2017 17:56:42 +0100

* A multiplication for the size determination of a memory allocation
indicated that an array data structure should be processed.
Thus use the corresponding function "kmalloc_array".

This issue was detected by using the Coccinelle software.

* Replace the specification of a data structure by a pointer dereference
to make the corresponding size determination a bit safer according to
the Linux coding style convention.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
---
drivers/mtd/chips/cfi_cmdset_0002.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/mtd/chips/cfi_cmdset_0002.c b/drivers/mtd/chips/cfi_cmdset_0002.c
index 9dca881bb378..3bed67e35692 100644
--- a/drivers/mtd/chips/cfi_cmdset_0002.c
+++ b/drivers/mtd/chips/cfi_cmdset_0002.c
@@ -688,8 +688,9 @@ static struct mtd_info *cfi_amdstd_setup(struct mtd_info *mtd)
mtd->size = devsize * cfi->numchips;

mtd->numeraseregions = cfi->cfiq->NumEraseRegions * cfi->numchips;
- mtd->eraseregions = kmalloc(sizeof(struct mtd_erase_region_info)
- * mtd->numeraseregions, GFP_KERNEL);
+ mtd->eraseregions = kmalloc_array(mtd->numeraseregions,
+ sizeof(*mtd->eraseregions),
+ GFP_KERNEL);
if (!mtd->eraseregions)
goto setup_err;

--
2.11.0