Instead of self-checking overflow and allocating an array of specific size
by counting the total required space handy, we already have existed kernel
API which responses for all these works.
Signed-off-by: RinHizakura <s921975628@gmail.com>
Reviewed-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20211225100607.118932-1-s921975628@gmail.com
static int ns_setup_wear_reporting(struct mtd_info *mtd)
{
- size_t mem;
-
wear_eb_count = div_u64(mtd->size, mtd->erasesize);
- mem = wear_eb_count * sizeof(unsigned long);
- if (mem / sizeof(unsigned long) != wear_eb_count) {
- NS_ERR("Too many erase blocks for wear reporting\n");
- return -ENOMEM;
- }
- erase_block_wear = kzalloc(mem, GFP_KERNEL);
+ erase_block_wear = kcalloc(wear_eb_count, sizeof(unsigned long), GFP_KERNEL);
if (!erase_block_wear) {
NS_ERR("Too many erase blocks for wear reporting\n");
return -ENOMEM;