SFP-Refactor: Could not able to fetch get_transceiver_info()

[aravindmani-1]

While trying to dump transceiver information for CMIS device, it crashes with following trace.
python3
Python 3.9.2 (default, Feb 28 2021, 17:03:44)
[GCC 10.2.1 20210110] on linux
Type "help", "copyright", "credits" or "license" for more information.

from sonic_platform.chassis import Chassis
c=Chassis()
c.get_sfp(1).get_transceiver_info()
Traceback (most recent call last):
File "", line 1, in
File "/usr/local/lib/python3.9/dist-packages/sonic_platform_base/sonic_xcvr/sfp_optoe_base.py", line 24, in get_transceiver_info
return api.get_transceiver_info() if api is not None else None
File "/usr/local/lib/python3.9/dist-packages/sonic_platform_base/sonic_xcvr/api/public/cmis.py", line 23, in get_transceiver_info
admin_info = self.xcvr_eeprom.read(consts.ADMIN_INFO_FIELD)
File "/usr/local/lib/python3.9/dist-packages/sonic_platform_base/sonic_xcvr/xcvr_eeprom.py", line 28, in read
return field.decode(raw_data, **decoded_deps)
File "/usr/local/lib/python3.9/dist-packages/sonic_platform_base/sonic_xcvr/fields/xcvr_field.py", line 235, in decode
result[field.name] = field.decode(raw_data[offset - start: offset + field.get_size() - start],
File "/usr/local/lib/python3.9/dist-packages/sonic_platform_base/sonic_xcvr/fields/public/cmis.py", line 12, in decode
mult = 10 ** (len_mult - 1)
TypeError: unsupported operand type(s) for -: 'NoneType' and 'int'

[aravindmani-1]

len_mult field is returning None.

[prgeor]

@andywongarista can you please check this issue?

[andywongarista]

I'll look into this.