Commit d9e5d174 authored by Gustavo A. R. Silva's avatar Gustavo A. R. Silva Committed by Marc Kleine-Budde

can: kvaser_usb: Use struct_size() in alloc_candev()

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 = alloc(sizeof(struct foo) + count * sizeof(void *));

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

instance = alloc(struct_size(instance, entry, count));

This code was detected with the help of Coccinelle.
Signed-off-by: default avatarGustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: default avatarMarc Kleine-Budde <mkl@pengutronix.de>
parent 2d91fdcc
......@@ -643,8 +643,7 @@ static int kvaser_usb_init_one(struct kvaser_usb *dev,
return err;
}
netdev = alloc_candev(sizeof(*priv) +
dev->max_tx_urbs * sizeof(*priv->tx_contexts),
netdev = alloc_candev(struct_size(priv, tx_contexts, dev->max_tx_urbs),
dev->max_tx_urbs);
if (!netdev) {
dev_err(&dev->intf->dev, "Cannot alloc candev\n");
......
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