linux-kernel - [PATCH] iwlwifi: Use kmemdup instead of duplicating it in iwl_parse_nvm_mcc

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Date:   Thu, 6 Sep 2018 11:13:22 +0800
From:   YueHaibing <yuehaibing@...wei.com>
To:     <davem@...emloft.net>, <johannes.berg@...el.com>,
        <emmanuel.grumbach@...el.com>, <luciano.coelho@...el.com>,
        <linuxwifi@...el.com>, <kvalo@...eaurora.org>
CC:     <linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>,
        <linux-wireless@...r.kernel.org>,
        YueHaibing <yuehaibing@...wei.com>
Subject: [PATCH] iwlwifi: Use kmemdup instead of duplicating it in iwl_parse_nvm_mcc_info

Replace calls to kmalloc followed by a memcpy with a direct call to
kmemdup.

Patch found using coccinelle.

Signed-off-by: YueHaibing <yuehaibing@...wei.com>
---
 drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.c b/drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.c
index 27db4a3..bd91657 100644
--- a/drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.c
+++ b/drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.c
@@ -1113,14 +1113,12 @@ iwl_parse_nvm_mcc_info(struct device *dev, const struct iwl_cfg *cfg,
 	regd_to_copy = sizeof(struct ieee80211_regdomain) +
 		valid_rules * sizeof(struct ieee80211_reg_rule);
 
-	copy_rd = kzalloc(regd_to_copy, GFP_KERNEL);
+	copy_rd = kmemdup(reg, regd_to_copy, GFP_KERNEL);
 	if (!copy_rd) {
 		copy_rd = ERR_PTR(-ENOMEM);
 		goto out;
 	}
 
-	memcpy(copy_rd, regd, regd_to_copy);
-
 out:
 	kfree(regdb_ptrs);
 	kfree(regd);
-- 
2.7.0