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Date: Fri, 14 Aug 2020 20:42:29 -0700 From: Gwendal Grignou <gwendal@...omium.org> To: ejcaruso@...omium.org, drinkcat@...omium.org, enric.balletbo@...labora.com, groeck@...omium.org Cc: linux-kernel@...r.kernel.org, Gwendal Grignou <gwendal@...omium.org> Subject: [PATCH] platform: cros_ec: Reduce ligthbar get version command By default, the lightbar commands are set to the biggest lightbar command and response. That length is greater than 128 bytes and may not work on all machines. But all EC are probed for lightbar by sending a get version request. Set that request size precisely. BUG=chromium:160662061 TEST=Before the command would be: cros_ec_cmd: version: 0, command: EC_CMD_LIGHTBAR_CMD, outsize: 194, insize: 128, result: 0 Afer: cros_ec_cmd: version: 0, command: EC_CMD_LIGHTBAR_CMD, outsize: 1, insize: 8, result: 0 Signed-off-by: Gwendal Grignou <gwendal@...omium.org> --- drivers/platform/chrome/cros_ec_lightbar.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/platform/chrome/cros_ec_lightbar.c b/drivers/platform/chrome/cros_ec_lightbar.c index b59180bff5a3e..ef61298c30bdd 100644 --- a/drivers/platform/chrome/cros_ec_lightbar.c +++ b/drivers/platform/chrome/cros_ec_lightbar.c @@ -116,6 +116,8 @@ static int get_lightbar_version(struct cros_ec_dev *ec, param = (struct ec_params_lightbar *)msg->data; param->cmd = LIGHTBAR_CMD_VERSION; + msg->outsize = sizeof(param->cmd); + msg->result = sizeof(resp->version); ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg); if (ret < 0) { ret = 0; -- 2.28.0.220.ged08abb693-goog
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