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Date: Tue, 7 Jun 2022 14:56:39 +0000
From: Tzung-Bi Shih <tzungbi@...nel.org>
To: bleung@...omium.org, groeck@...omium.org
Cc: chrome-platform@...ts.linux.dev, linux-kernel@...r.kernel.org,
tzungbi@...nel.org
Subject: [PATCH v2 15/15] platform/chrome: cros_ec_proto: return 0 on getting wake mask success
cros_ec_get_host_event_wake_mask() used to return value from
send_command() which is number of bytes for input payload on success
(i.e. sizeof(struct ec_response_host_event_mask)).
However, the callers don't need to know how many bytes are available.
- Fix cros_ec_get_host_event_wake_mask() to return 0 on success;
negative integers on error.
- Add a Kunit test for guarding if send_command() returns 0 in
get_host_event_wake_mask().
Signed-off-by: Tzung-Bi Shih <tzungbi@...nel.org>
---
Changes from v1:
- Return 0 on success; otherwise, negative intergers.
drivers/platform/chrome/cros_ec_proto.c | 23 ++--
drivers/platform/chrome/cros_ec_proto_test.c | 128 +++++++++++++++++++
2 files changed, 142 insertions(+), 9 deletions(-)
diff --git a/drivers/platform/chrome/cros_ec_proto.c b/drivers/platform/chrome/cros_ec_proto.c
index 9d96ed16244f..04c852aa790b 100644
--- a/drivers/platform/chrome/cros_ec_proto.c
+++ b/drivers/platform/chrome/cros_ec_proto.c
@@ -256,18 +256,23 @@ static int cros_ec_get_host_event_wake_mask(struct cros_ec_device *ec_dev, uint3
msg->insize = sizeof(*r);
ret = send_command(ec_dev, msg);
- if (ret >= 0) {
- mapped = cros_ec_map_error(msg->result);
- if (mapped) {
- ret = mapped;
- goto exit;
- }
+ if (ret < 0)
+ goto exit;
+
+ mapped = cros_ec_map_error(msg->result);
+ if (mapped) {
+ ret = mapped;
+ goto exit;
}
- if (ret > 0) {
- r = (struct ec_response_host_event_mask *)msg->data;
- *mask = r->mask;
+
+ if (ret == 0) {
+ ret = -EPROTO;
+ goto exit;
}
+ r = (struct ec_response_host_event_mask *)msg->data;
+ *mask = r->mask;
+ ret = 0;
exit:
kfree(msg);
return ret;
diff --git a/drivers/platform/chrome/cros_ec_proto_test.c b/drivers/platform/chrome/cros_ec_proto_test.c
index af69410f2978..3ee0de337d53 100644
--- a/drivers/platform/chrome/cros_ec_proto_test.c
+++ b/drivers/platform/chrome/cros_ec_proto_test.c
@@ -1406,6 +1406,133 @@ static void cros_ec_proto_test_query_all_default_wake_mask_return_error(struct k
}
}
+static void cros_ec_proto_test_query_all_default_wake_mask_return0(struct kunit *test)
+{
+ struct cros_ec_proto_test_priv *priv = test->priv;
+ struct cros_ec_device *ec_dev = &priv->ec_dev;
+ struct ec_xfer_mock *mock;
+ int ret;
+
+ /* Set some garbage bytes. */
+ ec_dev->host_event_wake_mask = U32_MAX;
+
+ /* For cros_ec_get_proto_info() without passthru. */
+ {
+ struct ec_response_get_protocol_info *data;
+
+ mock = cros_kunit_ec_xfer_mock_add(test, sizeof(*data));
+ KUNIT_ASSERT_PTR_NE(test, mock, NULL);
+
+ /*
+ * Although it doesn't check the value, provides valid sizes so that
+ * cros_ec_query_all() allocates din and dout correctly.
+ */
+ data = (struct ec_response_get_protocol_info *)mock->o_data;
+ data->max_request_packet_size = 0xbe;
+ data->max_response_packet_size = 0xef;
+ }
+
+ /* For cros_ec_get_proto_info() with passthru. */
+ {
+ mock = cros_kunit_ec_xfer_mock_addx(test, 0, EC_RES_INVALID_COMMAND, 0);
+ KUNIT_ASSERT_PTR_NE(test, mock, NULL);
+ }
+
+ /* For cros_ec_get_host_command_version_mask() for MKBP. */
+ {
+ mock = cros_kunit_ec_xfer_mock_add(test, 0);
+ KUNIT_ASSERT_PTR_NE(test, mock, NULL);
+ }
+
+ /* For cros_ec_get_host_command_version_mask() for host sleep v1. */
+ {
+ mock = cros_kunit_ec_xfer_mock_add(test, 0);
+ KUNIT_ASSERT_PTR_NE(test, mock, NULL);
+ }
+
+ /* For get_host_event_wake_mask(). */
+ {
+ mock = cros_kunit_ec_xfer_mock_add(test, 0);
+ KUNIT_ASSERT_PTR_NE(test, mock, NULL);
+ }
+
+ cros_ec_proto_test_query_all_pretest(test);
+ ret = cros_ec_query_all(ec_dev);
+ KUNIT_EXPECT_EQ(test, ret, 0);
+
+ /* For cros_ec_get_proto_info() without passthru. */
+ {
+ mock = cros_kunit_ec_xfer_mock_next();
+ KUNIT_EXPECT_PTR_NE(test, mock, NULL);
+
+ KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
+ KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_GET_PROTOCOL_INFO);
+ KUNIT_EXPECT_EQ(test, mock->msg.insize,
+ sizeof(struct ec_response_get_protocol_info));
+ KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
+ }
+
+ /* For cros_ec_get_proto_info() with passthru. */
+ {
+ mock = cros_kunit_ec_xfer_mock_next();
+ KUNIT_EXPECT_PTR_NE(test, mock, NULL);
+
+ KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
+ KUNIT_EXPECT_EQ(test, mock->msg.command,
+ EC_CMD_PASSTHRU_OFFSET(CROS_EC_DEV_PD_INDEX) |
+ EC_CMD_GET_PROTOCOL_INFO);
+ KUNIT_EXPECT_EQ(test, mock->msg.insize,
+ sizeof(struct ec_response_get_protocol_info));
+ KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
+ }
+
+ /* For cros_ec_get_host_command_version_mask() for MKBP. */
+ {
+ mock = cros_kunit_ec_xfer_mock_next();
+ KUNIT_EXPECT_PTR_NE(test, mock, NULL);
+
+ KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
+ KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_GET_CMD_VERSIONS);
+ KUNIT_EXPECT_EQ(test, mock->msg.insize,
+ sizeof(struct ec_response_get_cmd_versions));
+ KUNIT_EXPECT_EQ(test, mock->msg.outsize, sizeof(struct ec_params_get_cmd_versions));
+ }
+
+ /* For cros_ec_get_host_command_version_mask() for host sleep v1. */
+ {
+ mock = cros_kunit_ec_xfer_mock_next();
+ KUNIT_EXPECT_PTR_NE(test, mock, NULL);
+
+ KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
+ KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_GET_CMD_VERSIONS);
+ KUNIT_EXPECT_EQ(test, mock->msg.insize,
+ sizeof(struct ec_response_get_cmd_versions));
+ KUNIT_EXPECT_EQ(test, mock->msg.outsize, sizeof(struct ec_params_get_cmd_versions));
+ }
+
+ /* For get_host_event_wake_mask(). */
+ {
+ u32 mask;
+
+ mock = cros_kunit_ec_xfer_mock_next();
+ KUNIT_EXPECT_PTR_NE(test, mock, NULL);
+
+ KUNIT_EXPECT_EQ(test, mock->msg.version, 0);
+ KUNIT_EXPECT_EQ(test, mock->msg.command, EC_CMD_HOST_EVENT_GET_WAKE_MASK);
+ KUNIT_EXPECT_EQ(test, mock->msg.insize, sizeof(struct ec_response_host_event_mask));
+ KUNIT_EXPECT_EQ(test, mock->msg.outsize, 0);
+
+ mask = ec_dev->host_event_wake_mask;
+ KUNIT_EXPECT_EQ(test, mask & EC_HOST_EVENT_MASK(EC_HOST_EVENT_LID_CLOSED), 0);
+ KUNIT_EXPECT_EQ(test, mask & EC_HOST_EVENT_MASK(EC_HOST_EVENT_AC_DISCONNECTED), 0);
+ KUNIT_EXPECT_EQ(test, mask & EC_HOST_EVENT_MASK(EC_HOST_EVENT_BATTERY_LOW), 0);
+ KUNIT_EXPECT_EQ(test, mask & EC_HOST_EVENT_MASK(EC_HOST_EVENT_BATTERY_CRITICAL), 0);
+ KUNIT_EXPECT_EQ(test, mask & EC_HOST_EVENT_MASK(EC_HOST_EVENT_BATTERY), 0);
+ KUNIT_EXPECT_EQ(test, mask & EC_HOST_EVENT_MASK(EC_HOST_EVENT_PD_MCU), 0);
+ KUNIT_EXPECT_EQ(test, mask & EC_HOST_EVENT_MASK(EC_HOST_EVENT_BATTERY_STATUS), 0);
+ }
+}
+
static void cros_ec_proto_test_release(struct device *dev)
{
}
@@ -1471,6 +1598,7 @@ static struct kunit_case cros_ec_proto_test_cases[] = {
KUNIT_CASE(cros_ec_proto_test_query_all_no_host_sleep),
KUNIT_CASE(cros_ec_proto_test_query_all_no_host_sleep_return0),
KUNIT_CASE(cros_ec_proto_test_query_all_default_wake_mask_return_error),
+ KUNIT_CASE(cros_ec_proto_test_query_all_default_wake_mask_return0),
{}
};
--
2.36.1.255.ge46751e96f-goog
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