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cros_ec_lightbar: Accept more error codes from cros_ec_cmd_xfer_status

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Since commit c5cd2b47b2 ("platform/chrome: cros_ec_proto: Report command
not supported") we can no longer assume that cros_ec_cmd_xfer_status()
reports -EPROTO for all errors returned by the EC itself. A follow-up
patch will change cros_ec_cmd_xfer_status() to report additional errors
reported by the EC as distinguished Linux error codes.

Handle this change by no longer assuming that -EPROTO is used to report
all errors returned by the EC itself. Since errors reported by the EC are
already reported in text form through sysfs attributes, extend this form
of error reporting to all errors reported by cros_ec_cmd_xfer_status().

Cc: Gwendal Grignou <gwendal@chromium.org>
Cc: Yu-Hsuan Hsu <yuhsuan@chromium.org>
Cc: Prashant Malani <pmalani@chromium.org>
Cc: Brian Norris <briannorris@chromium.org>
Reviewed-by: Brian Norris <briannorris@chromium.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
This commit is contained in:
Guenter Roeck 2020-08-22 08:08:52 -07:00 committed by Enric Balletbo i Serra
parent 1716420e8d
commit 064df8851f
1 changed files with 4 additions and 6 deletions
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10
drivers/platform/chrome/cros_ec_lightbar.c
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@ -117,7 +117,7 @@ static int get_lightbar_version(struct cros_ec_dev *ec,
param = (struct ec_params_lightbar *)msg->data;
param->cmd = LIGHTBAR_CMD_VERSION;
ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
if (ret < 0) {
if (ret < 0 && ret != -EINVAL) {
ret = 0;
goto exit;
}
@ -298,11 +298,9 @@ static ssize_t sequence_show(struct device *dev,
goto exit;
ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
if (ret == -EPROTO) {
ret = scnprintf(buf, PAGE_SIZE,
"ERROR: EC returned %d\n", msg->result);
goto exit;
} else if (ret < 0) {
if (ret < 0) {
ret = scnprintf(buf, PAGE_SIZE, "XFER / EC ERROR %d / %d\n",
ret, msg->result);
goto exit;
}