diff mbox series

[v4,2/7] cros_ec_lightbar: Accept more error codes from cros_ec_cmd_xfer_status

Message ID 20200806153308.204605-3-linux@roeck-us.net
State Accepted
Commit 064df8851f4ac25f64c0323fc93c3f9705e1702d
Headers show
Series None | expand

Commit Message

Guenter Roeck Aug. 6, 2020, 3:33 p.m. UTC
Since commit c5cd2b47b203 ("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>
---
v4: No change
v3: No change
v2: Added patch

 drivers/platform/chrome/cros_ec_lightbar.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)
diff mbox series

Patch

diff --git a/drivers/platform/chrome/cros_ec_lightbar.c b/drivers/platform/chrome/cros_ec_lightbar.c
index b59180bff5a3..8445cda57927 100644
--- a/drivers/platform/chrome/cros_ec_lightbar.c
+++ b/drivers/platform/chrome/cros_ec_lightbar.c
@@ -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;
 	}