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Date: Wed, 3 Apr 2019 11:03:42 -0500 From: "Gustavo A. R. Silva" <gustavo@...eddedor.com> To: Johannes Berg <johannes.berg@...el.com>, Emmanuel Grumbach <emmanuel.grumbach@...el.com>, Luca Coelho <luciano.coelho@...el.com>, Intel Linux Wireless <linuxwifi@...el.com>, Kalle Valo <kvalo@...eaurora.org>, "David S. Miller" <davem@...emloft.net> Cc: linux-wireless@...r.kernel.org, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, "Gustavo A. R. Silva" <gustavo@...eddedor.com> Subject: [PATCH][next] iwlwifi: d3: Use struct_size() helper Make use of the struct_size() helper instead of an open-coded version in order to avoid any potential type mistakes, in particular in the context in which this code is being used. So, change the following form: sizeof(*pattern_cmd) + wowlan->n_patterns * sizeof(struct iwlagn_wowlan_pattern) to : struct_size(pattern_cmd, patterns, wowlan->n_patterns) This code was detected with the help of Coccinelle. Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com> --- drivers/net/wireless/intel/iwlwifi/mvm/d3.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/d3.c b/drivers/net/wireless/intel/iwlwifi/mvm/d3.c index 83fd7f93d9f5..99589b910bce 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/d3.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/d3.c @@ -398,8 +398,7 @@ static int iwl_mvm_send_patterns(struct iwl_mvm *mvm, if (!wowlan->n_patterns) return 0; - cmd.len[0] = sizeof(*pattern_cmd) + - wowlan->n_patterns * sizeof(struct iwl_wowlan_pattern); + cmd.len[0] = struct_size(pattern_cmd, patterns, wowlan->n_patterns); pattern_cmd = kmalloc(cmd.len[0], GFP_KERNEL); if (!pattern_cmd) -- 2.21.0
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