Retry hwsim tests 3 times on fail

.github/workflows/hostap.yml

@@ -189,12 +189,24 @@ jobs:
         id: testing
         working-directory: hostap/tests/hwsim/
         run: |
-          # Run tests in increments of 100 to cut down on the uploaded log size.
-          while mapfile -t -n 100 ary && ((${#ary[@]})); do
+          # Run tests in increments of 50 to cut down on the uploaded log size.
+          while mapfile -t -n 50 ary && ((${#ary[@]})); do
             TESTS=$(printf '%s\n' "${ary[@]}" | tr '\n' ' ')
-            sudo ./start.sh
-            sudo ./run-tests.py ${{ env.hostap_debug_flags }} --split ${{ matrix.server }}/5 $TESTS
-            sudo ./stop.sh
+            # Retry up to three times
+            for i in {1..3}; do
+              HWSIM_RES=0
+              # Logs can grow quickly especially in debug mode
+              sudo rm -rf logs
+              sudo ./start.sh
+              sudo ./run-tests.py ${{ env.hostap_debug_flags }} --split ${{ matrix.server }}/5 $TESTS || HWSIM_RES=$?
+              sudo ./stop.sh
+              if [ "$HWSIM_RES" -eq "0" ]; then
+                break
+              fi
+            done
+            if [ "$HWSIM_RES" -ne "0" ]; then
+              exit $HWSIM_RES
+            fi
           done < $GITHUB_WORKSPACE/wolfssl/.github/workflows/hostap-files/configs/${{ matrix.config.hostap_ref }}/tests
 
       - name: Change failure log permissions