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mtd: rawnand: jz4780: 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);

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
This commit is contained in:
Gustavo A. R. Silva 2018-08-23 14:33:32 -05:00 committed by Miquel Raynal
parent a9fdba0b0e
commit 81592c69c9
1 changed files with 1 additions and 1 deletions
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2
drivers/mtd/nand/raw/jz4780_nand.c
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@ -352,7 +352,7 @@ static int jz4780_nand_probe(struct platform_device *pdev)
return -ENODEV;
}
nfc = devm_kzalloc(dev, sizeof(*nfc) + (sizeof(nfc->cs[0]) * num_banks), GFP_KERNEL);
nfc = devm_kzalloc(dev, struct_size(nfc, cs, num_banks), GFP_KERNEL);
if (!nfc)
return -ENOMEM;