platform/chrome: cros_ec_proto: handle empty payload in getting proto info
authorTzung-Bi Shih <tzungbi@kernel.org>
Thu, 9 Jun 2022 08:49:45 +0000 (08:49 +0000)
committerTzung-Bi Shih <tzungbi@kernel.org>
Fri, 10 Jun 2022 02:31:43 +0000 (02:31 +0000)
commit878c36f6caa45d6a6234465fb16da07fc639f51d
treec118f5013b418a4e73f354f3aea680dccd0c6186
parent3e97581ed9a24657cbfabaab215c9a646d94b351
platform/chrome: cros_ec_proto: handle empty payload in getting proto info

cros_ec_get_proto_info() expects to receive
sizeof(struct ec_response_get_protocol_info) from send_command().  The
payload is valid only if the return value is positive.

Return -EPROTO if send_command() returns 0 in cros_ec_get_proto_info().

Reviewed-by: Guenter Roeck <groeck@chromium.org>
Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>
Link: https://lore.kernel.org/r/20220609084957.3684698-10-tzungbi@kernel.org
drivers/platform/chrome/cros_ec_proto.c