Fix Coverity warnings

Author: rouault

apps/gdalalg_abstract_pipeline.h

@@ -218,14 +218,14 @@ template <class StepAlgorithm>
 std::string GDALAbstractPipelineAlgorithm<StepAlgorithm>::GetUsageAsJSON() const
 {
     CPLJSONDocument oDoc;
-    oDoc.LoadMemory(GDALAlgorithm::GetUsageAsJSON());
+    CPL_IGNORE_RET_VAL(oDoc.LoadMemory(GDALAlgorithm::GetUsageAsJSON()));
 
     CPLJSONArray jPipelineSteps;
     for (const std::string &name : m_stepRegistry.GetNames())
     {
         auto alg = GetStepAlg(name);
         CPLJSONDocument oStepDoc;
-        oStepDoc.LoadMemory(alg->GetUsageAsJSON());
+        CPL_IGNORE_RET_VAL(oStepDoc.LoadMemory(alg->GetUsageAsJSON()));
         jPipelineSteps.Add(oStepDoc.GetRoot());
     }
     oDoc.GetRoot().Add("pipeline_algorithms", jPipelineSteps);

frmts/libertiff/libertiffdataset.cpp

@@ -58,16 +58,11 @@ struct LIBERTIFFDatasetFileReader final : public LIBERTIFF_NS::FileReader
 
     uint64_t size() const override
     {
-        // coverity[missing_lock,lock_evasion]
+        std::lock_guard oLock(m_oMutex);
         if (m_nFileSize == 0)
         {
-            std::lock_guard oLock(m_oMutex);
-            // cppcheck-suppress identicalInnerCondition
-            if (m_nFileSize == 0)
-            {
-                m_fp->Seek(0, SEEK_END);
-                m_nFileSize = m_fp->Tell();
-            }
+            m_fp->Seek(0, SEEK_END);
+            m_nFileSize = m_fp->Tell();
         }
         return m_nFileSize;
     }