From: Gustavo A. R. Silva Date: Fri, 8 Feb 2019 03:29:10 +0000 (-0600) Subject: bnx2x: Use struct_size() in kzalloc() X-Git-Tag: v5.1-rc1~178^2~299 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=370600afdd2e33665c84d06f34e7c223d5379b4a;p=thirdparty%2Fkernel%2Flinux.git bnx2x: Use struct_size() in 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; 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 fsz is not necessary, hence it is removed. This code was detected with the help of Coccinelle. Signed-off-by: Gustavo A. R. Silva Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_vfpf.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_vfpf.c index 8e0a317b31f7d..a9bdc21873d32 100644 --- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_vfpf.c +++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_vfpf.c @@ -1654,13 +1654,9 @@ static int bnx2x_vf_mbx_macvlan_list(struct bnx2x *bp, { int i, j; struct bnx2x_vf_mac_vlan_filters *fl = NULL; - size_t fsz; - fsz = tlv->n_mac_vlan_filters * - sizeof(struct bnx2x_vf_mac_vlan_filter) + - sizeof(struct bnx2x_vf_mac_vlan_filters); - - fl = kzalloc(fsz, GFP_KERNEL); + fl = kzalloc(struct_size(fl, filters, tlv->n_mac_vlan_filters), + GFP_KERNEL); if (!fl) return -ENOMEM;