qcacmn: Initialize ret in send_pdev_utf_cmd_tlv

If param->len was 0, ret would be returned without being initialized.
param->len of 0 is unexpected, so return an error.

Change-Id: Ib9b0a60976dedcf8fcd4184083a9948892791621
CRs-Fixed: 1072077

wmi/inc/wmi_unified_api.h

@@ -171,7 +171,7 @@ void wmi_buf_free(wmi_buf_t net_buf);
  *  @param cmd_id          : WMI cmd id
  *  @return 0  on success and -ve on failure.
  */
-int
+QDF_STATUS
 wmi_unified_cmd_send(wmi_unified_t wmi_handle, wmi_buf_t buf, uint32_t buflen,
 			uint32_t cmd_id);
 

wmi/src/wmi_unified.c

@@ -1719,8 +1719,8 @@ static bool wmi_is_pm_resume_cmd(uint32_t cmd_id)
  *
  * Return: 0 on success
  */
-int wmi_unified_cmd_send(wmi_unified_t wmi_handle, wmi_buf_t buf, uint32_t len,
-			 uint32_t cmd_id)
+QDF_STATUS wmi_unified_cmd_send(wmi_unified_t wmi_handle, wmi_buf_t buf,
+				uint32_t len, uint32_t cmd_id)
 {
 	HTC_PACKET *pkt;
 	A_STATUS status;
@@ -1739,7 +1739,7 @@ int wmi_unified_cmd_send(wmi_unified_t wmi_handle, wmi_buf_t buf, uint32_t len,
 	if (wmi_handle->wmi_stopinprogress) {
 		QDF_TRACE(QDF_MODULE_ID_WMI, QDF_TRACE_LEVEL_ERROR,
 			"WMI  stop in progress\n");
-		return -EINVAL;
+		return QDF_STATUS_E_INVAL;
 	}
 
 #ifndef WMI_NON_TLV_SUPPORT

wmi/src/wmi_unified_tlv.c

@@ -777,7 +777,8 @@ send_pdev_utf_cmd_tlv(wmi_unified_t wmi_handle,
 {
 	wmi_buf_t buf;
 	uint8_t *cmd;
-	QDF_STATUS ret;
+	/* if param->len is 0 no data is sent, return error */
+	QDF_STATUS ret = QDF_STATUS_E_INVAL;
 	static uint8_t msgref = 1;
 	uint8_t segNumber = 0, segInfo, numSegments;
 	uint16_t chunk_len, total_bytes;