diff mbox series

[v2,2/2] iwlwifi: Use struct_size() in kzalloc

Message ID 20190129032144.18120-3-yuehaibing@huawei.com (mailing list archive)
State Accepted
Delegated to: Luca Coelho
Headers show
Series cleanup for iwlwifi | expand

Commit Message

Yue Haibing Jan. 29, 2019, 3:21 a.m. UTC 
Use struct_size() in kzalloc instead of the 'regd_to_copy'

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
---
 drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.c | 13 +++----------
 1 file changed, 3 insertions(+), 10 deletions(-)

Comments

Luca Coelho Feb. 14, 2019, 6:58 a.m. UTC | #1 
On Tue, 2019-01-29 at 11:21 +0800, YueHaibing wrote:
> Use struct_size() in kzalloc instead of the 'regd_to_copy'
> 
> Signed-off-by: YueHaibing <yuehaibing@huawei.com>
> ---

Applied to our internal tree and it will reach the mainline following
our normal upstreaming process.

Thanks!

--
Luca.
diff mbox series

Patch

diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.c b/drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.c
index 569cc50..2b87c7c 100644
--- a/drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.c
+++ b/drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.c
@@ -1093,7 +1093,6 @@  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;
 	struct ieee80211_reg_rule *rule;
 	struct regdb_ptrs *regdb_ptrs;
 	enum nl80211_band band;
@@ -1113,11 +1112,7 @@  iwl_parse_nvm_mcc_info(struct device *dev, const struct iwl_cfg *cfg,
 		      num_of_ch);
 
 	/* 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);
+	regd = kzalloc(struct_size(regd, reg_rules, num_of_ch), GFP_KERNEL);
 	if (!regd)
 		return ERR_PTR(-ENOMEM);
 
@@ -1193,10 +1188,8 @@  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);