Staging: Use kcalloc or kzalloc

Use kcalloc or kzalloc rather than the combination of kmalloc and memset.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression x,y,flags;
statement S;
type T;
@@

x =
-   kmalloc
+   kcalloc
           (
-           y * sizeof(T),
+           y, sizeof(T),
                flags);
 if (x == NULL) S
-memset(x, 0, y * sizeof(T));

@@
expression x,size,flags;
statement S;
@@

-x = kmalloc(size,flags);
+x = kzalloc(size,flags);
 if (x == NULL) S
-memset(x, 0, size);
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>

6 files changed, 8 insertions, 17 deletions

diff --git a/drivers/staging/rtl8187se/ieee80211/ieee80211_crypt.c b/drivers/staging/rtl8187se/ieee80211/ieee80211_crypt.c
index 4c5d63fd583..c8dbcb92591 100644
--- a/drivers/staging/rtl8187se/ieee80211/ieee80211_crypt.c
+++ b/drivers/staging/rtl8187se/ieee80211/ieee80211_crypt.c
@@ -109,11 +109,10 @@ int ieee80211_register_crypto_ops(struct ieee80211_crypto_ops *ops)
 	if (hcrypt == NULL)
 		return -1;
 
-	alg = kmalloc(sizeof(*alg), GFP_KERNEL);
+	alg = kzalloc(sizeof(*alg), GFP_KERNEL);
 	if (alg == NULL)
 		return -ENOMEM;
 
-	memset(alg, 0, sizeof(*alg));
 	alg->ops = ops;
 
 	spin_lock_irqsave(&hcrypt->lock, flags);
@@ -207,11 +206,10 @@ int ieee80211_crypto_init(void)
 {
 	int ret = -ENOMEM;
 
-	hcrypt = kmalloc(sizeof(*hcrypt), GFP_KERNEL);
+	hcrypt = kzalloc(sizeof(*hcrypt), GFP_KERNEL);
 	if (!hcrypt)
 		goto out;
 
-	memset(hcrypt, 0, sizeof(*hcrypt));
 	INIT_LIST_HEAD(&hcrypt->algs);
 	spin_lock_init(&hcrypt->lock);
 
diff --git a/drivers/staging/rtl8187se/ieee80211/ieee80211_crypt_ccmp.c b/drivers/staging/rtl8187se/ieee80211/ieee80211_crypt_ccmp.c
index 40f1b99faad..731d2686411 100644
--- a/drivers/staging/rtl8187se/ieee80211/ieee80211_crypt_ccmp.c
+++ b/drivers/staging/rtl8187se/ieee80211/ieee80211_crypt_ccmp.c
@@ -69,10 +69,9 @@ static void * ieee80211_ccmp_init(int key_idx)
 {
 	struct ieee80211_ccmp_data *priv;
 
-	priv = kmalloc(sizeof(*priv), GFP_ATOMIC);
+	priv = kzalloc(sizeof(*priv), GFP_ATOMIC);
 	if (priv == NULL)
 		goto fail;
-	memset(priv, 0, sizeof(*priv));
 	priv->key_idx = key_idx;
 
 	priv->tfm = (void *)crypto_alloc_cipher("aes", 0, CRYPTO_ALG_ASYNC);
diff --git a/drivers/staging/rtl8187se/ieee80211/ieee80211_crypt_tkip.c b/drivers/staging/rtl8187se/ieee80211/ieee80211_crypt_tkip.c
index a5254111d9a..ee71ee90fd8 100644
--- a/drivers/staging/rtl8187se/ieee80211/ieee80211_crypt_tkip.c
+++ b/drivers/staging/rtl8187se/ieee80211/ieee80211_crypt_tkip.c
@@ -70,10 +70,9 @@ static void * ieee80211_tkip_init(int key_idx)
 {
 	struct ieee80211_tkip_data *priv;
 
-	priv = kmalloc(sizeof(*priv), GFP_ATOMIC);
+	priv = kzalloc(sizeof(*priv), GFP_ATOMIC);
 	if (priv == NULL)
 		goto fail;
-	memset(priv, 0, sizeof(*priv));
 	priv->key_idx = key_idx;
 
 	priv->tx_tfm_arc4 = crypto_alloc_blkcipher("ecb(arc4)", 0,
diff --git a/drivers/staging/rtl8187se/ieee80211/ieee80211_crypt_wep.c b/drivers/staging/rtl8187se/ieee80211/ieee80211_crypt_wep.c
index c6c3bc38459..f790cd65f10 100644
--- a/drivers/staging/rtl8187se/ieee80211/ieee80211_crypt_wep.c
+++ b/drivers/staging/rtl8187se/ieee80211/ieee80211_crypt_wep.c
@@ -45,10 +45,9 @@ static void * prism2_wep_init(int keyidx)
 {
 	struct prism2_wep_data *priv;
 
-	priv = kmalloc(sizeof(*priv), GFP_ATOMIC);
+	priv = kzalloc(sizeof(*priv), GFP_ATOMIC);
 	if (priv == NULL)
 		goto fail;
-	memset(priv, 0, sizeof(*priv));
 	priv->key_idx = keyidx;
 	priv->tx_tfm = crypto_alloc_blkcipher("ecb(arc4)", 0, CRYPTO_ALG_ASYNC);
 	if (IS_ERR(priv->tx_tfm)) {
diff --git a/drivers/staging/rtl8187se/ieee80211/ieee80211_module.c b/drivers/staging/rtl8187se/ieee80211/ieee80211_module.c
index 18392fce487..9d58a429c56 100644
--- a/drivers/staging/rtl8187se/ieee80211/ieee80211_module.c
+++ b/drivers/staging/rtl8187se/ieee80211/ieee80211_module.c
@@ -66,8 +66,8 @@ static inline int ieee80211_networks_allocate(struct ieee80211_device *ieee)
 	if (ieee->networks)
 		return 0;
 
-	ieee->networks = kmalloc(
-		MAX_NETWORK_COUNT * sizeof(struct ieee80211_network),
+	ieee->networks = kcalloc(
+		MAX_NETWORK_COUNT, sizeof(struct ieee80211_network),
 		GFP_KERNEL);
 	if (!ieee->networks) {
 		printk(KERN_WARNING "%s: Out of memory allocating beacons\n",
@@ -75,9 +75,6 @@ static inline int ieee80211_networks_allocate(struct ieee80211_device *ieee)
 		return -ENOMEM;
 	}
 
-	memset(ieee->networks, 0,
-	       MAX_NETWORK_COUNT * sizeof(struct ieee80211_network));
-
 	return 0;
 }
 
diff --git a/drivers/staging/rtl8187se/ieee80211/ieee80211_wx.c b/drivers/staging/rtl8187se/ieee80211/ieee80211_wx.c
index c5b80f9c32c..aa3ba450ece 100644
--- a/drivers/staging/rtl8187se/ieee80211/ieee80211_wx.c
+++ b/drivers/staging/rtl8187se/ieee80211/ieee80211_wx.c
@@ -325,11 +325,10 @@ int ieee80211_wx_set_encode(struct ieee80211_device *ieee,
 		struct ieee80211_crypt_data *new_crypt;
 
 		/* take WEP into use */
-		new_crypt = kmalloc(sizeof(struct ieee80211_crypt_data),
+		new_crypt = kzalloc(sizeof(struct ieee80211_crypt_data),
 				    GFP_KERNEL);
 		if (new_crypt == NULL)
 			return -ENOMEM;
-		memset(new_crypt, 0, sizeof(struct ieee80211_crypt_data));
 		new_crypt->ops = ieee80211_get_crypto_ops("WEP");
 		if (!new_crypt->ops)
 			new_crypt->ops = ieee80211_get_crypto_ops("WEP");