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platform/chrome: cros_ec_proto: return 0 on getting cmd mask success

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cros_ec_get_host_command_version_mask() used to return value from
send_command() which is number of available bytes for input payload on
success (i.e. sizeof(struct ec_response_get_cmd_versions)).

However, the callers don't need to know how many bytes are available.

Don't return number of available bytes.  Instead, return 0 on success;
otherwise, negative integers on error.

Also remove the unneeded `ver_mask` initialization as the callers should
take it only if cros_ec_get_host_command_version_mask() returns 0.

Reviewed-by: Guenter Roeck <groeck@chromium.org>
Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>
Link: https://lore.kernel.org/r/20220609084957.3684698-15-tzungbi@kernel.org
This commit is contained in:
Tzung-Bi Shih 2022-06-09 08:49:50 +00:00
parent b36f0643ff
commit f91183aa45
1 changed files with 5 additions and 8 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

13
drivers/platform/chrome/cros_ec_proto.c
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@ -453,6 +453,7 @@ static int cros_ec_get_host_command_version_mask(struct cros_ec_device *ec_dev,
if (ret > 0) {
rver = (struct ec_response_get_cmd_versions *)msg->data;
*mask = rver->version_mask;
ret = 0;
}
kfree(msg);
@ -470,7 +471,7 @@ static int cros_ec_get_host_command_version_mask(struct cros_ec_device *ec_dev,
int cros_ec_query_all(struct cros_ec_device *ec_dev)
{
struct device *dev = ec_dev->dev;
u32 ver_mask = 0;
u32 ver_mask;
int ret;
/* First try sending with proto v3. */
@ -509,9 +510,7 @@ int cros_ec_query_all(struct cros_ec_device *ec_dev)
}
/* Probe if MKBP event is supported */
ret = cros_ec_get_host_command_version_mask(ec_dev,
EC_CMD_GET_NEXT_EVENT,
&ver_mask);
ret = cros_ec_get_host_command_version_mask(ec_dev, EC_CMD_GET_NEXT_EVENT, &ver_mask);
if (ret < 0 || ver_mask == 0) {
ec_dev->mkbp_event_supported = 0;
} else {
@ -521,10 +520,8 @@ int cros_ec_query_all(struct cros_ec_device *ec_dev)
}
/* Probe if host sleep v1 is supported for S0ix failure detection. */
ret = cros_ec_get_host_command_version_mask(ec_dev,
EC_CMD_HOST_SLEEP_EVENT,
&ver_mask);
ec_dev->host_sleep_v1 = (ret >= 0 && (ver_mask & EC_VER_MASK(1)));
ret = cros_ec_get_host_command_version_mask(ec_dev, EC_CMD_HOST_SLEEP_EVENT, &ver_mask);
ec_dev->host_sleep_v1 = (ret == 0 && (ver_mask & EC_VER_MASK(1)));
/* Get host event wake mask. */
ret = cros_ec_get_host_event_wake_mask(ec_dev, &ec_dev->host_event_wake_mask);