linux-kernel - [PATCH 07/11] platform/chrome: cros_ec_proto: return -EAGAIN when retries timed out

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Date:   Wed, 15 Jun 2022 05:12:44 +0000
From:   Tzung-Bi Shih <tzungbi@...nel.org>
To:     bleung@...omium.org, groeck@...omium.org
Cc:     chrome-platform@...ts.linux.dev, tzungbi@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 07/11] platform/chrome: cros_ec_proto: return -EAGAIN when retries timed out

While EC_COMMS_STATUS_PROCESSING flag is still on after it tries
EC_COMMAND_RETRIES times for sending EC_CMD_GET_COMMS_STATUS,
cros_ec_wait_until_complete() doesn't return an error code.

Return -EAGAIN in the case instead.

Signed-off-by: Tzung-Bi Shih <tzungbi@...nel.org>
---
 drivers/platform/chrome/cros_ec_proto.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/platform/chrome/cros_ec_proto.c b/drivers/platform/chrome/cros_ec_proto.c
index 466ecb063bd6..49772a4c5353 100644
--- a/drivers/platform/chrome/cros_ec_proto.c
+++ b/drivers/platform/chrome/cros_ec_proto.c
@@ -167,6 +167,9 @@ static int cros_ec_wait_until_complete(struct cros_ec_device *ec_dev, uint32_t *
 			break;
 	}
 
+	if (i >= EC_COMMAND_RETRIES)
+		ret = -EAGAIN;
+
 	kfree(msg);
 	return ret;
 }
-- 
2.36.1.476.g0c4daa206d-goog