batman-adv: prefer kmalloc_array to kmalloc when possible

Reported by checkpatch with the following warning:
WARNING: Prefer kmalloc_array over kmalloc with multiply

Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>

3 files changed, 12 insertions, 10 deletions

diff --git a/net/batman-adv/bat_iv_ogm.c b/net/batman-adv/bat_iv_ogm.c
index f04224c32005..1e8053976e83 100644
--- a/net/batman-adv/bat_iv_ogm.c
+++ b/net/batman-adv/bat_iv_ogm.c
@@ -108,14 +108,15 @@ static int batadv_iv_ogm_orig_add_if(struct batadv_orig_node *orig_node,
                                      int max_if_num)
 {
         void *data_ptr;
-        size_t data_size, old_size;
+        size_t old_size;
         int ret = -ENOMEM;
 
         spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock);
 
-        data_size = max_if_num * sizeof(unsigned long) * BATADV_NUM_WORDS;
         old_size = (max_if_num - 1) * sizeof(unsigned long) * BATADV_NUM_WORDS;
-        data_ptr = kmalloc(data_size, GFP_ATOMIC);
+        data_ptr = kmalloc_array(max_if_num,
+                                 BATADV_NUM_WORDS * sizeof(unsigned long),
+                                 GFP_ATOMIC);
         if (!data_ptr)
                 goto unlock;
 
@@ -123,7 +124,7 @@ static int batadv_iv_ogm_orig_add_if(struct batadv_orig_node *orig_node,
         kfree(orig_node->bat_iv.bcast_own);
         orig_node->bat_iv.bcast_own = data_ptr;
 
-        data_ptr = kmalloc(max_if_num * sizeof(uint8_t), GFP_ATOMIC);
+        data_ptr = kmalloc_array(max_if_num, sizeof(uint8_t), GFP_ATOMIC);
         if (!data_ptr) {
                 kfree(orig_node->bat_iv.bcast_own);
                 goto unlock;
@@ -164,7 +165,7 @@ static int batadv_iv_ogm_orig_del_if(struct batadv_orig_node *orig_node,
                 goto free_bcast_own;
 
         chunk_size = sizeof(unsigned long) * BATADV_NUM_WORDS;
-        data_ptr = kmalloc(max_if_num * chunk_size, GFP_ATOMIC);
+        data_ptr = kmalloc_array(max_if_num, chunk_size, GFP_ATOMIC);
         if (!data_ptr)
                 goto unlock;
 
@@ -183,7 +184,7 @@ free_bcast_own:
         if (max_if_num == 0)
                 goto free_own_sum;
 
-        data_ptr = kmalloc(max_if_num * sizeof(uint8_t), GFP_ATOMIC);
+        data_ptr = kmalloc_array(max_if_num, sizeof(uint8_t), GFP_ATOMIC);
         if (!data_ptr) {
                 kfree(orig_node->bat_iv.bcast_own);
                 goto unlock;
diff --git a/net/batman-adv/distributed-arp-table.c b/net/batman-adv/distributed-arp-table.c
index f2c066b21716..b5981113c9a7 100644
--- a/net/batman-adv/distributed-arp-table.c
+++ b/net/batman-adv/distributed-arp-table.c
@@ -537,7 +537,8 @@ batadv_dat_select_candidates(struct batadv_priv *bat_priv, __be32 ip_dst)
         if (!bat_priv->orig_hash)
                 return NULL;
 
-        res = kmalloc(BATADV_DAT_CANDIDATES_NUM * sizeof(*res), GFP_ATOMIC);
+        res = kmalloc_array(BATADV_DAT_CANDIDATES_NUM, sizeof(*res),
+                            GFP_ATOMIC);
         if (!res)
                 return NULL;
 
diff --git a/net/batman-adv/hash.c b/net/batman-adv/hash.c
index 63bdf7e94f1e..7c1c63080e20 100644
--- a/net/batman-adv/hash.c
+++ b/net/batman-adv/hash.c
@@ -46,12 +46,12 @@ struct batadv_hashtable *batadv_hash_new(uint32_t size)
         if (!hash)
                 return NULL;
 
-        hash->table = kmalloc(sizeof(*hash->table) * size, GFP_ATOMIC);
+        hash->table = kmalloc_array(size, sizeof(*hash->table), GFP_ATOMIC);
         if (!hash->table)
                 goto free_hash;
 
-        hash->list_locks = kmalloc(sizeof(*hash->list_locks) * size,
-                                   GFP_ATOMIC);
+        hash->list_locks = kmalloc_array(size, sizeof(*hash->list_locks),
+                                         GFP_ATOMIC);
         if (!hash->list_locks)
                 goto free_table;