diff options
author | Gustavo A. R. Silva <gustavo@embeddedor.com> | 2019-02-07 22:15:40 -0600 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2019-02-08 23:03:48 -0800 |
commit | a0feac18b8b590d9b588b4285841bac7c372fd8b (patch) | |
tree | 6715a06c5670c00cb8fb631de589813fbd412938 /drivers/net/ethernet/intel | |
parent | c397ab21ba362d5c5215e53f36685a9fffc45f66 (diff) |
igb: use struct_size() helper
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;
struct boo entry[];
};
size = sizeof(struct foo) + count * sizeof(struct boo);
instance = alloc(size, GFP_KERNEL);
Instead of leaving these open-coded and prone to type mistakes, we can
now use the new struct_size() helper:
size = struct_size(instance, entry, count);
This code was detected with the help of Coccinelle.
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/intel')
-rw-r--r-- | drivers/net/ethernet/intel/igb/igb_main.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c index 6d812e96572d..69b230c53fed 100644 --- a/drivers/net/ethernet/intel/igb/igb_main.c +++ b/drivers/net/ethernet/intel/igb/igb_main.c @@ -1189,15 +1189,15 @@ static int igb_alloc_q_vector(struct igb_adapter *adapter, { struct igb_q_vector *q_vector; struct igb_ring *ring; - int ring_count, size; + int ring_count; + size_t size; /* igb only supports 1 Tx and/or 1 Rx queue per vector */ if (txr_count > 1 || rxr_count > 1) return -ENOMEM; ring_count = txr_count + rxr_count; - size = sizeof(struct igb_q_vector) + - (sizeof(struct igb_ring) * ring_count); + size = struct_size(q_vector, ring, ring_count); /* allocate q_vector and rings */ q_vector = adapter->q_vector[v_idx]; |