Staging: wilc1000: wilc_wfi_cfgoperations: Remove NULL check before kfree

kfree on NULL pointer is a no-op.

The semantic patch used-

// <smpl>
@@ expression E; @@
- if (E != NULL) { kfree(E); }
+ kfree(E);
@@ expression E; @@
- if (E != NULL) { kfree(E); E = NULL; }
+ kfree(E);
+ E = NULL;
// </smpl>smpl>

Signed-off-by: Shraddha Barke <shraddha.6596@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/wilc1000/wilc_wfi_cfgoperations.c b/drivers/staging/wilc1000/wilc_wfi_cfgoperations.c
index cb2144f..6430bbf 100644 (file)
--- a/drivers/staging/wilc1000/wilc_wfi_cfgoperations.c
+++ b/drivers/staging/wilc1000/wilc_wfi_cfgoperations.c
@@ -233,10 +233,8 @@ static void remove_network_from_shadow(unsigned long arg)
                if (time_after(now, astrLastScannedNtwrksShadow[i].u32TimeRcvdInScan + (unsigned long)(SCAN_RESULT_EXPIRE))) {
                        PRINT_D(CFG80211_DBG, "Network expired in ScanShadow: %s\n", astrLastScannedNtwrksShadow[i].au8ssid);
 
-                       if (astrLastScannedNtwrksShadow[i].pu8IEs != NULL) {
-                               kfree(astrLastScannedNtwrksShadow[i].pu8IEs);
-                               astrLastScannedNtwrksShadow[i].pu8IEs = NULL;
-                       }
+                       kfree(astrLastScannedNtwrksShadow[i].pu8IEs);
+                       astrLastScannedNtwrksShadow[i].pu8IEs = NULL;
 
                        host_int_freeJoinParams(astrLastScannedNtwrksShadow[i].pJoinParams);
 
@@ -1171,15 +1169,13 @@ static int add_key(struct wiphy *wiphy, struct net_device *netdev, u8 key_index,
                                        KeyLen = params->key_len - 16;
                                }
                                /* if there has been previous allocation for the same index through its key, free that memory and allocate again*/
-                               if (priv->wilc_gtk[key_index]->key)
-                                       kfree(priv->wilc_gtk[key_index]->key);
+                               kfree(priv->wilc_gtk[key_index]->key);
 
                                priv->wilc_gtk[key_index]->key = kmalloc(params->key_len, GFP_KERNEL);
                                memcpy(priv->wilc_gtk[key_index]->key, params->key, params->key_len);
 
                                /* if there has been previous allocation for the same index through its seq, free that memory and allocate again*/
-                               if (priv->wilc_gtk[key_index]->seq)
-                                       kfree(priv->wilc_gtk[key_index]->seq);
+                               kfree(priv->wilc_gtk[key_index]->seq);
 
                                if ((params->seq_len) > 0) {
                                        priv->wilc_gtk[key_index]->seq = kmalloc(params->seq_len, GFP_KERNEL);
@@ -1217,13 +1213,11 @@ static int add_key(struct wiphy *wiphy, struct net_device *netdev, u8 key_index,
                                        KeyLen = params->key_len - 16;
                                }
 
-                               if (priv->wilc_ptk[key_index]->key)
-                                       kfree(priv->wilc_ptk[key_index]->key);
+                               kfree(priv->wilc_ptk[key_index]->key);
 
                                priv->wilc_ptk[key_index]->key = kmalloc(params->key_len, GFP_KERNEL);
 
-                               if (priv->wilc_ptk[key_index]->seq)
-                                       kfree(priv->wilc_ptk[key_index]->seq);
+                               kfree(priv->wilc_ptk[key_index]->seq);
 
                                if ((params->seq_len) > 0)
                                        priv->wilc_ptk[key_index]->seq = kmalloc(params->seq_len, GFP_KERNEL);
@@ -1369,25 +1363,17 @@ static int del_key(struct wiphy *wiphy, struct net_device *netdev,
                g_wep_keys_saved = false;
 
                /*Delete saved WEP keys params, if any*/
-               if (g_key_wep_params.key != NULL) {
-                       kfree(g_key_wep_params.key);
-                       g_key_wep_params.key = NULL;
-               }
+               kfree(g_key_wep_params.key);
+               g_key_wep_params.key = NULL;
 
                /*freeing memory allocated by "wilc_gtk" and "wilc_ptk" in "WILC_WIFI_ADD_KEY"*/
 
                if ((priv->wilc_gtk[key_index]) != NULL) {
 
-                       if (priv->wilc_gtk[key_index]->key != NULL) {
-
-                               kfree(priv->wilc_gtk[key_index]->key);
-                               priv->wilc_gtk[key_index]->key = NULL;
-                       }
-                       if (priv->wilc_gtk[key_index]->seq) {
-
-                               kfree(priv->wilc_gtk[key_index]->seq);
-                               priv->wilc_gtk[key_index]->seq = NULL;
-                       }
+                       kfree(priv->wilc_gtk[key_index]->key);
+                       priv->wilc_gtk[key_index]->key = NULL;
+                       kfree(priv->wilc_gtk[key_index]->seq);
+                       priv->wilc_gtk[key_index]->seq = NULL;
 
                        kfree(priv->wilc_gtk[key_index]);
                        priv->wilc_gtk[key_index] = NULL;
@@ -1396,38 +1382,24 @@ static int del_key(struct wiphy *wiphy, struct net_device *netdev,
 
                if ((priv->wilc_ptk[key_index]) != NULL) {
 
-                       if (priv->wilc_ptk[key_index]->key) {
-
-                               kfree(priv->wilc_ptk[key_index]->key);
-                               priv->wilc_ptk[key_index]->key = NULL;
-                       }
-                       if (priv->wilc_ptk[key_index]->seq) {
-
-                               kfree(priv->wilc_ptk[key_index]->seq);
-                               priv->wilc_ptk[key_index]->seq = NULL;
-                       }
+                       kfree(priv->wilc_ptk[key_index]->key);
+                       priv->wilc_ptk[key_index]->key = NULL;
+                       kfree(priv->wilc_ptk[key_index]->seq);
+                       priv->wilc_ptk[key_index]->seq = NULL;
                        kfree(priv->wilc_ptk[key_index]);
                        priv->wilc_ptk[key_index] = NULL;
                }
 
                /*Delete saved PTK and GTK keys params, if any*/
-               if (g_key_ptk_params.key != NULL) {
-                       kfree(g_key_ptk_params.key);
-                       g_key_ptk_params.key = NULL;
-               }
-               if (g_key_ptk_params.seq != NULL) {
-                       kfree(g_key_ptk_params.seq);
-                       g_key_ptk_params.seq = NULL;
-               }
-
-               if (g_key_gtk_params.key != NULL) {
-                       kfree(g_key_gtk_params.key);
-                       g_key_gtk_params.key = NULL;
-               }
-               if (g_key_gtk_params.seq != NULL) {
-                       kfree(g_key_gtk_params.seq);
-                       g_key_gtk_params.seq = NULL;
-               }
+               kfree(g_key_ptk_params.key);
+               g_key_ptk_params.key = NULL;
+               kfree(g_key_ptk_params.seq);
+               g_key_ptk_params.seq = NULL;
+
+               kfree(g_key_gtk_params.key);
+               g_key_gtk_params.key = NULL;
+               kfree(g_key_gtk_params.seq);
+               g_key_gtk_params.seq = NULL;
 
                /*Reset WILC_CHANGING_VIR_IF register to allow adding futrue keys to CE H/W*/
                Set_machw_change_vir_if(false);