linux-kernel - [PATCH v2 02/17] platform/chrome: chardev: Use cros_ec

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Message-Id: <20200205190028.183069-3-pmalani@chromium.org>
Date:   Wed,  5 Feb 2020 10:59:57 -0800
From:   Prashant Malani <pmalani@...omium.org>
To:     linux-kernel@...r.kernel.org
Cc:     Prashant Malani <pmalani@...omium.org>,
        Benson Leung <bleung@...omium.org>,
        Enric Balletbo i Serra <enric.balletbo@...labora.com>,
        Guenter Roeck <groeck@...omium.org>
Subject: [PATCH v2 02/17] platform/chrome: chardev: Use cros_ec_cmd()

Update the Chrome OS character device driver to use the newly introduced
cros_ec_cmd() function instead of cros_ec_cmd_xfer_status(), thus
avoiding message buffer set up work which is already done by the new
function.

Signed-off-by: Prashant Malani <pmalani@...omium.org>
---

Changes in v2:
- Updated to use newer function name and parameter list.

 drivers/platform/chrome/cros_ec_chardev.c | 17 ++++++-----------
 1 file changed, 6 insertions(+), 11 deletions(-)

diff --git a/drivers/platform/chrome/cros_ec_chardev.c b/drivers/platform/chrome/cros_ec_chardev.c
index c65e70bc168d8c..f92fe4139c4367 100644
--- a/drivers/platform/chrome/cros_ec_chardev.c
+++ b/drivers/platform/chrome/cros_ec_chardev.c
@@ -57,25 +57,20 @@ static int ec_get_version(struct cros_ec_dev *ec, char *str, int maxlen)
 		"unknown", "read-only", "read-write", "invalid",
 	};
 	struct ec_response_get_version *resp;
-	struct cros_ec_command *msg;
 	int ret;
 
-	msg = kzalloc(sizeof(*msg) + sizeof(*resp), GFP_KERNEL);
-	if (!msg)
+	resp = kzalloc(sizeof(*resp), GFP_KERNEL);
+	if (!resp)
 		return -ENOMEM;
 
-	msg->command = EC_CMD_GET_VERSION + ec->cmd_offset;
-	msg->insize = sizeof(*resp);
-
-	ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
+	ret = cros_ec_cmd(ec->ec_dev, 0, ec->cmd_offset + EC_CMD_GET_VERSION,
+			  NULL, 0, resp, sizeof(*resp), NULL);
 	if (ret < 0) {
 		snprintf(str, maxlen,
-			 "Unknown EC version, returned error: %d\n",
-			 msg->result);
+			 "Unknown EC version, returned error: %d\n", ret);
 		goto exit;
 	}
 
-	resp = (struct ec_response_get_version *)msg->data;
 	if (resp->current_image >= ARRAY_SIZE(current_image_name))
 		resp->current_image = 3; /* invalid */
 
@@ -85,7 +80,7 @@ static int ec_get_version(struct cros_ec_dev *ec, char *str, int maxlen)
 
 	ret = 0;
 exit:
-	kfree(msg);
+	kfree(resp);
 	return ret;
 }
 
-- 
2.25.0.341.g760bfbb309-goog