Messages in this thread Patch in this message | | | From | Tzung-Bi Shih <> | Subject | [PATCH v4 14/21] platform/chrome: cros_ec_proto: return 0 on getting cmd mask success | Date | Thu, 9 Jun 2022 08:49:50 +0000 |
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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> --- Changes from v3: - Add R-b tag.
Changes from v2: - Separate Kunit test to another patch. - Rephrase the commit message.
Changes from v1: - Return 0 on success; otherwise, negative intergers.
drivers/platform/chrome/cros_ec_proto.c | 13 +++++-------- 1 file changed, 5 insertions(+), 8 deletions(-)
diff --git a/drivers/platform/chrome/cros_ec_proto.c b/drivers/platform/chrome/cros_ec_proto.c index e6e9b5b59e58..20a1f8f7e70d 100644 --- a/drivers/platform/chrome/cros_ec_proto.c +++ b/drivers/platform/chrome/cros_ec_proto.c @@ -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); -- 2.36.1.255.ge46751e96f-goog
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