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mtd: rawnand: marvell: use struct_size() in devm_kzalloc()

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One of the more common cases of allocation size calculations is finding
the size of a structure that has a zero-sized array at the end, along
with memory for some number of elements for that array. For example:

struct foo {
    int stuff;
    void *entry[];
};

instance = devm_kzalloc(dev, sizeof(struct foo) + sizeof(void *) * count, GFP_KERNEL);

Instead of leaving these open-coded and prone to type mistakes, we can
now use the new struct_size() helper:

instance = devm_kzalloc(dev, struct_size(instance, entry, count), GFP_KERNEL);

This code was detected with the help of Coccinelle.

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
This commit is contained in:
Gustavo A. R. Silva 2019-01-04 12:20:51 -06:00 committed by Miquel Raynal
parent 511d05e0da
commit 7b30196534
1 changed files with 2 additions and 3 deletions
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5
drivers/mtd/nand/raw/marvell_nand.c
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@ -2550,9 +2550,8 @@ static int marvell_nand_chip_init(struct device *dev, struct marvell_nfc *nfc,
}
/* Alloc the nand chip structure */
marvell_nand = devm_kzalloc(dev, sizeof(*marvell_nand) +
(nsels *
sizeof(struct marvell_nand_chip_sel)),
marvell_nand = devm_kzalloc(dev,
struct_size(marvell_nand, sels, nsels),
GFP_KERNEL);
if (!marvell_nand) {
dev_err(dev, "could not allocate chip structure\n");