dpdk: suppress scan-build warnings

 source-dpdk.c:201:21: warning: Access to field 'dev' results in a dereference of a null pointer (loaded from field 'livedev') [core.NullDereference]
  201 |                     ptv->livedev->dev, rte_strerror(-retval), flush_error.message);
      |                     ^~~~~~~~~~~~~~~~~
./util-debug.h:262:74: note: expanded from macro 'SCLogError'
  262 |     SCLogErr(SC_LOG_ERROR, __FILE__, __FUNCTION__, __LINE__, _sc_module, __VA_ARGS__)
      |                                                                          ^~~~~~~~~~~
source-dpdk.c:641:17: warning: Potential leak of memory pointed to by 'ptv' [unix.Malloc]
  641 |     SCReturnInt(TM_ECODE_FAILED);
      |                 ^~~~~~~~~~~~~~~
./util-debug.h:275:48: note: expanded from macro 'SCReturnInt'
  275 | #define SCReturnInt(x)                  return x
      |                                                ^
source-dpdk.c:732:67: warning: Access to field 'dev' results in a dereference of a null pointer (loaded from field 'livedev') [core.NullDereference]
  732 |             SCLogError("%s: error (%s) when getting device info", ptv->livedev->dev,
      |                                                                   ^~~~~~~~~~~~~~~~~
./util-debug.h:262:74: note: expanded from macro 'SCLogError'
  262 |     SCLogErr(SC_LOG_ERROR, __FILE__, __FUNCTION__, __LINE__, _sc_module, __VA_ARGS__)
      |                                                                          ^~~~~~~~~~~
3 warnings generated.

src/source-dpdk.c

@@ -724,18 +724,19 @@ static TmEcode ReceiveDPDKThreadDeinit(ThreadVars *tv, void *data)
 {
     SCEnter();
     DPDKThreadVars *ptv = (DPDKThreadVars *)data;
+    if (ptv == NULL)
+        SCReturnInt(TM_ECODE_OK);
 
     if (ptv->queue_id == 0) {
         struct rte_eth_dev_info dev_info;
         int retval = rte_eth_dev_info_get(ptv->port_id, &dev_info);
-        if (retval != 0) {
-            SCLogError("%s: error (%s) when getting device info", ptv->livedev->dev,
+        if (retval == 0) {
+            DevicePreClosePMDSpecificActions(ptv, dev_info.driver_name);
+        } else {
+            SCLogWarning("%s: error (%s) when getting device info", ptv->livedev->dev,
                     rte_strerror(-retval));
-            SCReturnInt(TM_ECODE_FAILED);
         }
 
-        DevicePreClosePMDSpecificActions(ptv, dev_info.driver_name);
-
         if (ptv->workers_sync) {
             SCFree(ptv->workers_sync);
         }