diff options
author | Gustavo A. R. Silva <gustavo@embeddedor.com> | 2019-02-07 22:19:45 -0600 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2019-02-08 23:03:48 -0800 |
commit | 196d7311fab5941b1bc883471c7f46350fa1a797 (patch) | |
tree | 5bd6c8eb091231ccf21245f2bc98ca66f75d87f4 /drivers/net/ethernet/intel/igc | |
parent | a0feac18b8b590d9b588b4285841bac7c372fd8b (diff) |
igc: 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 = kzalloc(size, GFP_KERNEL)
Instead of leaving these open-coded and prone to type mistakes, we can
now use the new struct_size() helper:
instance = kzalloc(struct_size(instance, entry, count), GFP_KERNEL)
Notice that, in this case, variable size is not necessary, hence
it is removed.
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/igc')
-rw-r--r-- | drivers/net/ethernet/intel/igc/igc_main.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c index 11c75433fe22..87a11879bf2d 100644 --- a/drivers/net/ethernet/intel/igc/igc_main.c +++ b/drivers/net/ethernet/intel/igc/igc_main.c @@ -2958,22 +2958,21 @@ static int igc_alloc_q_vector(struct igc_adapter *adapter, { struct igc_q_vector *q_vector; struct igc_ring *ring; - int ring_count, size; + int ring_count; /* igc 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 igc_q_vector) + - (sizeof(struct igc_ring) * ring_count); /* allocate q_vector and rings */ q_vector = adapter->q_vector[v_idx]; if (!q_vector) - q_vector = kzalloc(size, GFP_KERNEL); + q_vector = kzalloc(struct_size(q_vector, ring, ring_count), + GFP_KERNEL); else - memset(q_vector, 0, size); + memset(q_vector, 0, struct_size(q_vector, ring, ring_count)); if (!q_vector) return -ENOMEM; |