[Mellanox] get_error_description should return Not supported for modu…

…les that does not support this API (sonic-net#21196)

- Why I did it
Not all xcvr API support get_error_description, for example sff8636. For those API types, get_error_description should return "Not supported".

- How I did it
get_error_description should return "Not supported".

- How to verify it
Manual test
unit test

platform/mellanox/mlnx-platform-api/sonic_platform/sfp.py

@@ -359,7 +359,7 @@ def get_error_info_from_sdk_error_type(self):
         Returns:
             tuple: (error state, error description)
         """
-        error_type = utils.read_int_from_file(f'/sys/module/sx_core/asic0/module{self.sdk_index}/temperature/statuserror', default=-1)
+        error_type = utils.read_int_from_file(f'/sys/module/sx_core/asic0/module{self.sdk_index}/statuserror', default=-1)
         sfp_state_bits = NvidiaSFPCommon.SDK_ERRORS_TO_ERROR_BITS.get(error_type)
         if sfp_state_bits is None:
             logger.log_error(f"Unrecognized error {error_type} detected on SFP {self.sdk_index}")
@@ -678,7 +678,9 @@ def get_error_description(self):
             if self.is_sw_control():
                 api = self.get_xcvr_api()
                 return api.get_error_description() if api else None
-        except:
+        except NotImplementedError:
+            return 'Not supported'
+        except Exception:
             return self.SFP_STATUS_INITIALIZING
 
         oper_status, error_code = self._get_module_info(self.sdk_index)

platform/mellanox/mlnx-platform-api/tests/test_sfp.py

@@ -94,6 +94,10 @@ def test_sfp_get_error_status(self, mock_get_error_code, mock_control):
         mock_control.side_effect = RuntimeError('')
         description = sfp.get_error_description()
         assert description == 'Initializing'
+
+        mock_control.side_effect = NotImplementedError('')
+        description = sfp.get_error_description()
+        assert description == 'Not supported'
 
     @mock.patch('sonic_platform.sfp.SFP._get_page_and_page_offset')
     @mock.patch('sonic_platform.sfp.SFP._is_write_protected')