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| author | Gustavo A. R. Silva <gustavo@embeddedor.com> | 2019-01-04 20:48:19 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-01-08 18:56:04 +0300 |
| commit | 84f1c5c0174ace114af318c8de35c3eeb0d04495 (patch) | |
| tree | a941cf6245cdf212b3dc77331ef34c82b606dfef /drivers/tty | |
| parent | 51f689cc11333944c7a457f25ec75fcb41e99410 (diff) | |
| download | linux-84f1c5c0174ace114af318c8de35c3eeb0d04495.tar.xz | |
sc16is7xx: Use struct_size() in devm_kzalloc()
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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/sc16is7xx.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/drivers/tty/serial/sc16is7xx.c b/drivers/tty/serial/sc16is7xx.c index 268098681856..635178cf3eed 100644 --- a/drivers/tty/serial/sc16is7xx.c +++ b/drivers/tty/serial/sc16is7xx.c @@ -1187,9 +1187,7 @@ static int sc16is7xx_probe(struct device *dev, return PTR_ERR(regmap); /* Alloc port structure */ - s = devm_kzalloc(dev, sizeof(*s) + - sizeof(struct sc16is7xx_one) * devtype->nr_uart, - GFP_KERNEL); + s = devm_kzalloc(dev, struct_size(s, p, devtype->nr_uart), GFP_KERNEL); if (!s) { dev_err(dev, "Error allocating port structure\n"); return -ENOMEM; |