qcacld-3.0: Fix memory leaks when WMI send fails

Calls to wmi_unified_cmd_send() do not cleanup the passed buffer on
failure. Ensure all calls to wmi_unified_cmd_send() handle the failure
case and free the passed buffer.

Change-Id: I222bfbafc7e1f2eb0e11a54775a5d01a7a339521
CRs-Fixed: 1100325

core/wma/src/wma_features.c

@@ -5558,6 +5558,8 @@ QDF_STATUS wma_process_get_peer_info_req
 
 	ret = wmi_unified_cmd_send(wma->wmi_handle, buf, len,
 				   WMI_PEER_INFO_REQ_CMDID);
+	if (ret != QDF_STATUS_SUCCESS)
+		wmi_buf_free(buf);
 
 	WMA_LOGE("IBSS get peer info cmd sent len: %d, vdev %d"
 		 " command id: %d, status: %d", len,
@@ -5649,6 +5651,8 @@ QDF_STATUS wma_process_rmc_enable_ind(tp_wma_handle wma)
 
 	ret = wmi_unified_cmd_send(wma->wmi_handle, buf, len,
 				   WMI_RMC_SET_MODE_CMDID);
+	if (ret != QDF_STATUS_SUCCESS)
+		wmi_buf_free(buf);
 
 	WMA_LOGE("Enable RMC cmd sent len: %d, vdev %d" " command id: %d,"
 		 " status: %d", len, vdev_id, WMI_RMC_SET_MODE_CMDID, ret);
@@ -5699,6 +5703,8 @@ QDF_STATUS wma_process_rmc_disable_ind(tp_wma_handle wma)
 
 	ret = wmi_unified_cmd_send(wma->wmi_handle, buf, len,
 				   WMI_RMC_SET_MODE_CMDID);
+	if (ret != QDF_STATUS_SUCCESS)
+		wmi_buf_free(buf);
 
 	WMA_LOGE("Disable RMC cmd sent len: %d, vdev %d" " command id: %d,"
 		 " status: %d", len, vdev_id, WMI_RMC_SET_MODE_CMDID, ret);
@@ -5762,6 +5768,8 @@ QDF_STATUS wma_process_rmc_action_period_ind(tp_wma_handle wma)
 
 	ret = wmi_unified_cmd_send(wma->wmi_handle, buf, len,
 				   WMI_RMC_SET_ACTION_PERIOD_CMDID);
+	if (ret != QDF_STATUS_SUCCESS)
+		wmi_buf_free(buf);
 
 	WMA_LOGE("RMC action period %d cmd sent len: %d, vdev %d"
 		 " command id: %d, status: %d", periodicity_msec,

core/wma/src/wma_scan_roam.c

@@ -2812,7 +2812,7 @@ static QDF_STATUS wma_switch_channel(tp_wma_handle wma,
 
 	if (ret < 0) {
 		WMA_LOGP("%s: Failed to send vdev start command", __func__);
-		qdf_nbuf_free(buf);
+		wmi_buf_free(buf);
 		return QDF_STATUS_E_FAILURE;
 	}