linux-kernel - [PATCH v2 09/17] hid: google-hammer: Use cros_ec

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Message-Id: <20200205190028.183069-10-pmalani@chromium.org>
Date:   Wed,  5 Feb 2020 11:00:11 -0800
From:   Prashant Malani <pmalani@...omium.org>
To:     linux-kernel@...r.kernel.org
Cc:     Prashant Malani <pmalani@...omium.org>,
        Jiri Kosina <jikos@...nel.org>,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        linux-input@...r.kernel.org (open list:HID CORE LAYER)
Subject: [PATCH v2 09/17] hid: google-hammer: Use cros_ec_cmd()

Replace cros_ec_cmd_xfer_status() with cros_ec_cmd() which does the
message buffer setup and cleanup.

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

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

 drivers/hid/hid-google-hammer.c | 23 +++++------------------
 1 file changed, 5 insertions(+), 18 deletions(-)

diff --git a/drivers/hid/hid-google-hammer.c b/drivers/hid/hid-google-hammer.c
index 2aa4ed157aec87..fb0d2a01e2736e 100644
--- a/drivers/hid/hid-google-hammer.c
+++ b/drivers/hid/hid-google-hammer.c
@@ -53,38 +53,25 @@ static bool cbas_parse_base_state(const void *data)
 static int cbas_ec_query_base(struct cros_ec_device *ec_dev, bool get_state,
 				  bool *state)
 {
-	struct ec_params_mkbp_info *params;
-	struct cros_ec_command *msg;
+	struct ec_params_mkbp_info params = {0};
 	int ret;
 
-	msg = kzalloc(sizeof(*msg) + max(sizeof(u32), sizeof(*params)),
-		      GFP_KERNEL);
-	if (!msg)
-		return -ENOMEM;
-
-	msg->command = EC_CMD_MKBP_INFO;
-	msg->version = 1;
-	msg->outsize = sizeof(*params);
-	msg->insize = sizeof(u32);
-	params = (struct ec_params_mkbp_info *)msg->data;
-	params->info_type = get_state ?
+	params.info_type = get_state ?
 		EC_MKBP_INFO_CURRENT : EC_MKBP_INFO_SUPPORTED;
-	params->event_type = EC_MKBP_EVENT_SWITCH;
+	params.event_type = EC_MKBP_EVENT_SWITCH;
 
-	ret = cros_ec_cmd_xfer_status(ec_dev, msg);
+	ret = cros_ec_cmd(ec_dev, 1, EC_CMD_MKBP_INFO, &params, sizeof(params),
+			  state, sizeof(u32), NULL);
 	if (ret >= 0) {
 		if (ret != sizeof(u32)) {
 			dev_warn(ec_dev->dev, "wrong result size: %d != %zu\n",
 				 ret, sizeof(u32));
 			ret = -EPROTO;
 		} else {
-			*state = cbas_parse_base_state(msg->data);
 			ret = 0;
 		}
 	}
 
-	kfree(msg);
-
 	return ret;
 }
 
-- 
2.25.0.341.g760bfbb309-goog