staging: rtl8188eu: rtw_cmd: 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_cmd.c

@@ -258,11 +258,11 @@ u8 rtw_sitesurvey_cmd(struct adapter  *padapter, struct ndis_802_11_ssid *ssid,
 		rtw_lps_ctrl_wk_cmd(padapter, LPS_CTRL_SCAN, 1);
 
 	ph2c = kzalloc(sizeof(struct cmd_obj), GFP_ATOMIC);
-	if (ph2c == NULL)
+	if (!ph2c)
 		return _FAIL;
 
 	psurveyPara = kzalloc(sizeof(struct sitesurvey_parm), GFP_ATOMIC);
-	if (psurveyPara == NULL) {
+	if (!psurveyPara) {
 		kfree(ph2c);
 		return _FAIL;
 	}
@@ -345,7 +345,7 @@ u8 rtw_createbss_cmd(struct adapter  *padapter)
 		RT_TRACE(_module_rtl871x_cmd_c_, _drv_info_, (" createbss for SSid:%s\n", pmlmepriv->assoc_ssid.Ssid));
 
 	pcmd = kzalloc(sizeof(struct cmd_obj), GFP_KERNEL);
-	if (pcmd == NULL) {
+	if (!pcmd) {
 		res = _FAIL;
 		goto exit;
 	}
@@ -516,7 +516,7 @@ u8 rtw_disassoc_cmd(struct adapter *padapter, u32 deauth_timeout_ms, bool enqueu
 
 	/* prepare cmd parameter */
 	param = kzalloc(sizeof(*param), GFP_KERNEL);
-	if (param == NULL) {
+	if (!param) {
 		res = _FAIL;
 		goto exit;
 	}
@@ -525,7 +525,7 @@ u8 rtw_disassoc_cmd(struct adapter *padapter, u32 deauth_timeout_ms, bool enqueu
 	if (enqueue) {
 		/* need enqueue, prepare cmd_obj and enqueue */
 		cmdobj = kzalloc(sizeof(*cmdobj), GFP_KERNEL);
-		if (cmdobj == NULL) {
+		if (!cmdobj) {
 			res = _FAIL;
 			kfree(param);
 			goto exit;
@@ -624,20 +624,20 @@ u8 rtw_clearstakey_cmd(struct adapter *padapter, u8 *psta, u8 entry, u8 enqueue)
 		clear_cam_entry(padapter, entry);
 	} else {
 		ph2c = kzalloc(sizeof(struct cmd_obj), GFP_ATOMIC);
-		if (ph2c == NULL) {
+		if (!ph2c) {
 			res = _FAIL;
 			goto exit;
 		}
 
 		psetstakey_para = kzalloc(sizeof(struct set_stakey_parm), GFP_ATOMIC);
-		if (psetstakey_para == NULL) {
+		if (!psetstakey_para) {
 			kfree(ph2c);
 			res = _FAIL;
 			goto exit;
 		}
 
 		psetstakey_rsp = kzalloc(sizeof(struct set_stakey_rsp), GFP_ATOMIC);
-		if (psetstakey_rsp == NULL) {
+		if (!psetstakey_rsp) {
 			kfree(ph2c);
 			kfree(psetstakey_para);
 			res = _FAIL;
@@ -671,13 +671,13 @@ u8 rtw_addbareq_cmd(struct adapter *padapter, u8 tid, u8 *addr)
 
 
 	ph2c = kzalloc(sizeof(struct cmd_obj), GFP_KERNEL);
-	if (ph2c == NULL) {
+	if (!ph2c) {
 		res = _FAIL;
 		goto exit;
 	}
 
 	paddbareq_parm = kzalloc(sizeof(struct addBaReq_parm), GFP_KERNEL);
-	if (paddbareq_parm == NULL) {
+	if (!paddbareq_parm) {
 		kfree(ph2c);
 		res = _FAIL;
 		goto exit;
@@ -708,13 +708,13 @@ u8 rtw_dynamic_chk_wk_cmd(struct adapter *padapter)
 
 
 	ph2c = kzalloc(sizeof(struct cmd_obj), GFP_ATOMIC);
-	if (ph2c == NULL) {
+	if (!ph2c) {
 		res = _FAIL;
 		goto exit;
 	}
 
 	pdrvextra_cmd_parm = kzalloc(sizeof(struct drvextra_cmd_parm), GFP_ATOMIC);
-	if (pdrvextra_cmd_parm == NULL) {
+	if (!pdrvextra_cmd_parm) {
 		kfree(ph2c);
 		res = _FAIL;
 		goto exit;
@@ -752,7 +752,7 @@ u8 rtw_set_chplan_cmd(struct adapter *padapter, u8 chplan, u8 enqueue)
 
 	/* prepare cmd parameter */
 	setChannelPlan_param = kzalloc(sizeof(struct SetChannelPlan_param), GFP_KERNEL);
-	if (setChannelPlan_param == NULL) {
+	if (!setChannelPlan_param) {
 		res = _FAIL;
 		goto exit;
 	}
@@ -761,7 +761,7 @@ u8 rtw_set_chplan_cmd(struct adapter *padapter, u8 chplan, u8 enqueue)
 	if (enqueue) {
 		/* need enqueue, prepare cmd_obj and enqueue */
 		pcmdobj = kzalloc(sizeof(struct	cmd_obj), GFP_KERNEL);
-		if (pcmdobj == NULL) {
+		if (!pcmdobj) {
 			kfree(setChannelPlan_param);
 			res = _FAIL;
 			goto exit;
@@ -920,13 +920,13 @@ u8 rtw_lps_ctrl_wk_cmd(struct adapter *padapter, u8 lps_ctrl_type, u8 enqueue)
 
 	if (enqueue) {
 		ph2c = kzalloc(sizeof(struct cmd_obj), GFP_ATOMIC);
-		if (ph2c == NULL) {
+		if (!ph2c) {
 			res = _FAIL;
 			goto exit;
 		}
 
 		pdrvextra_cmd_parm = kzalloc(sizeof(struct drvextra_cmd_parm), GFP_ATOMIC);
-		if (pdrvextra_cmd_parm == NULL) {
+		if (!pdrvextra_cmd_parm) {
 			kfree(ph2c);
 			res = _FAIL;
 			goto exit;
@@ -963,13 +963,13 @@ u8 rtw_rpt_timer_cfg_cmd(struct adapter *padapter, u16 min_time)
 	u8	res = _SUCCESS;
 
 	ph2c = kzalloc(sizeof(struct cmd_obj), GFP_ATOMIC);
-	if (ph2c == NULL) {
+	if (!ph2c) {
 		res = _FAIL;
 		goto exit;
 	}
 
 	pdrvextra_cmd_parm = kzalloc(sizeof(struct drvextra_cmd_parm), GFP_ATOMIC);
-	if (pdrvextra_cmd_parm == NULL) {
+	if (!pdrvextra_cmd_parm) {
 		kfree(ph2c);
 		res = _FAIL;
 		goto exit;
@@ -1005,13 +1005,13 @@ u8 rtw_antenna_select_cmd(struct adapter *padapter, u8 antenna, u8 enqueue)
 
 	if (enqueue) {
 		ph2c = kzalloc(sizeof(struct cmd_obj), GFP_KERNEL);
-		if (ph2c == NULL) {
+		if (!ph2c) {
 			res = _FAIL;
 			goto exit;
 		}
 
 		pdrvextra_cmd_parm = kzalloc(sizeof(struct drvextra_cmd_parm), GFP_KERNEL);
-		if (pdrvextra_cmd_parm == NULL) {
+		if (!pdrvextra_cmd_parm) {
 			kfree(ph2c);
 			res = _FAIL;
 			goto exit;
@@ -1103,13 +1103,13 @@ u8 rtw_chk_hi_queue_cmd(struct adapter *padapter)
 	u8	res = _SUCCESS;
 
 	ph2c = kzalloc(sizeof(struct cmd_obj), GFP_KERNEL);
-	if (ph2c == NULL) {
+	if (!ph2c) {
 		res = _FAIL;
 		goto exit;
 	}
 
 	pdrvextra_cmd_parm = kzalloc(sizeof(struct drvextra_cmd_parm), GFP_KERNEL);
-	if (pdrvextra_cmd_parm == NULL) {
+	if (!pdrvextra_cmd_parm) {
 		kfree(ph2c);
 		res = _FAIL;
 		goto exit;