On 2019/1/29 5:57, Joe Perches wrote: > On Mon, 2019-01-28 at 14:44 +0800, YueHaibing wrote: >> Use struct_size() in kzalloc instead of the 'regd_to_copy' > > There is also the use above that in the same function > that could also be converted. > > /* build a regdomain rule for every valid channel */ > size_of_regd = > sizeof(struct ieee80211_regdomain) + > num_of_ch * sizeof(struct ieee80211_reg_rule); > > regd = kzalloc(size_of_regd, GFP_KERNEL); > if (!regd) > return ERR_PTR(-ENOMEM);
Thank you, will post v2. > >> diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.c >> b/drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.c > [] >> @@ -1093,7 +1093,7 @@ iwl_parse_nvm_mcc_info(struct device *dev, const >> struct iwl_cfg *cfg, >> const u8 *nvm_chan = cfg->nvm_type == IWL_NVM_EXT ? >> iwl_ext_nvm_channels : iwl_nvm_channels; >> struct ieee80211_regdomain *regd, *copy_rd; >> - int size_of_regd, regd_to_copy; >> + int size_of_regd; >> struct ieee80211_reg_rule *rule; >> struct regdb_ptrs *regdb_ptrs; >> enum nl80211_band band; >> @@ -1193,10 +1193,8 @@ iwl_parse_nvm_mcc_info(struct device *dev, const >> struct iwl_cfg *cfg, >> * Narrow down regdom for unused regulatory rules to prevent hole >> * between reg rules to wmm rules. >> */ >> - regd_to_copy = sizeof(struct ieee80211_regdomain) + >> - valid_rules * sizeof(struct ieee80211_reg_rule); >> - >> - copy_rd = kmemdup(regd, regd_to_copy, GFP_KERNEL); >> + copy_rd = kmemdup(regd, struct_size(regd, reg_rules, valid_rules), >> + GFP_KERNEL); >> if (!copy_rd) >> copy_rd = ERR_PTR(-ENOMEM); >> > > > . >
