From 53462f0f4772c1e81786df1261e2009b44fed9f2 Mon Sep 17 00:00:00 2001 From: "Gustavo A. R. Silva" Date: Fri, 29 Mar 2019 16:38:50 -0700 Subject: [PATCH] iavf: iavf_client: 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); 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" Tested-by: Andrew Bowers Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/iavf/iavf_client.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/drivers/net/ethernet/intel/iavf/iavf_client.c b/drivers/net/ethernet/intel/iavf/iavf_client.c index aea4536..ab9db7e 100644 --- a/drivers/net/ethernet/intel/iavf/iavf_client.c +++ b/drivers/net/ethernet/intel/iavf/iavf_client.c @@ -451,7 +451,7 @@ static int iavf_client_setup_qvlist(struct i40e_info *ldev, struct i40e_qv_info *qv_info; iavf_status err; u32 v_idx, i; - u32 msg_size; + size_t msg_size; if (adapter->aq_required) return -EAGAIN; @@ -469,9 +469,8 @@ static int iavf_client_setup_qvlist(struct i40e_info *ldev, } v_qvlist_info = (struct virtchnl_iwarp_qvlist_info *)qvlist_info; - msg_size = sizeof(struct virtchnl_iwarp_qvlist_info) + - (sizeof(struct virtchnl_iwarp_qv_info) * - (v_qvlist_info->num_vectors - 1)); + msg_size = struct_size(v_qvlist_info, qv_info, + v_qvlist_info->num_vectors - 1); adapter->client_pending |= BIT(VIRTCHNL_OP_CONFIG_IWARP_IRQ_MAP); err = iavf_aq_send_msg_to_pf(&adapter->hw, -- 2.7.4