add more checks

Signed-off-by: Joji Mekkattuparamban <[email protected]>

assets/state-vfio-manager/0400_configmap.yaml

@@ -127,15 +127,23 @@ data:
 
     get_graphics_aux_dev() {
         local gpu=$1
-        aux_dev="NONE"
         device_class_file=$(readlink -f "/sys/bus/pci/devices/$gpu/class")
         device_class=$(cat "$device_class_file")
         if [ "$device_class" == "0x030000" ]; then
           if ls "/sys/bus/pci/devices/$gpu" | grep consumer >& /dev/null; then
             aux_dev=$(ls "/sys/bus/pci/devices/$gpu" | grep consumer | awk -Fconsumer:pci: '{print $2}')
+            if [ "$device_class" == "" ]; then
+              echo "NONE"
+              return
+            fi
+
+            if ls "/sys/bus/pci/devices/$aux_dev/" >& /dev/null; then
+              echo "$aux_dev"
+              return
+            fi
           fi
         fi
-        echo "$aux_dev"
+        echo "NONE"
     }
 
     bind_device() {