staging: rtl8188eu: core: rtw_mlme: Clean up tests if NULL returned on failure

Some functions like kmalloc/kzalloc return NULL on failure.
When NULL represents failure, !x is commonly used.

This was done using Coccinelle:

@@
expression *e;
identifier l1;
@@

e = \(kmalloc\|kzalloc\|kcalloc\|devm_kzalloc\)(...);
...
- e == NULL
+ !e
Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8188eu/core/rtw_mlme.c

@@ -1579,13 +1579,13 @@ int rtw_set_auth(struct adapter *adapter, struct security_priv *psecuritypriv)
 	int		res = _SUCCESS;
 
 	pcmd = kzalloc(sizeof(struct cmd_obj), GFP_KERNEL);
-	if (pcmd == NULL) {
+	if (!pcmd) {
 		res = _FAIL;  /* try again */
 		goto exit;
 	}
 
 	psetauthparm = kzalloc(sizeof(struct setauth_parm), GFP_KERNEL);
-	if (psetauthparm == NULL) {
+	if (!psetauthparm) {
 		kfree(pcmd);
 		res = _FAIL;
 		goto exit;
@@ -1616,11 +1616,11 @@ int rtw_set_key(struct adapter *adapter, struct security_priv *psecuritypriv, in
 	int	res = _SUCCESS;
 
 	pcmd = kzalloc(sizeof(struct cmd_obj), GFP_KERNEL);
-	if (pcmd == NULL)
+	if (!pcmd)
 		return _FAIL;  /* try again */
 
 	psetkeyparm = kzalloc(sizeof(struct setkey_parm), GFP_KERNEL);
-	if (psetkeyparm == NULL) {
+	if (!psetkeyparm) {
 		res = _FAIL;
 		goto err_free_cmd;
 	}