Commit b5c61b96 authored by Gustavo A. R. Silva's avatar Gustavo A. R. Silva Committed by Jason Gunthorpe

IB/cm: Use struct_size() in kmalloc()

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 = kmalloc(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 = kmalloc(struct_size(instance, entry, count), GFP_KERNEL);

This code was detected with the help of Coccinelle.
Signed-off-by: default avatarGustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: default avatarJason Gunthorpe <jgg@mellanox.com>
parent bfeffd15
......@@ -4052,8 +4052,7 @@ static void cm_recv_handler(struct ib_mad_agent *mad_agent,
atomic_long_inc(&port->counter_group[CM_RECV].
counter[attr_id - CM_ATTR_ID_OFFSET]);
work = kmalloc(sizeof(*work) + sizeof(struct sa_path_rec) * paths,
GFP_KERNEL);
work = kmalloc(struct_size(work, path, paths), GFP_KERNEL);
if (!work) {
ib_free_recv_mad(mad_recv_wc);
return;
......
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