linux-kernel - [PATCH] firmware: stratix10-rsu: correctly report unsupported DCMF commands

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Date:   Wed, 29 Nov 2023 19:03:36 +0000
From:   Beniamin Sandu <beniaminsandu@...il.com>
To:     dinguyen@...nel.org, linux-kernel@...r.kernel.org
Cc:     Beniamin Sandu <beniaminsandu@...il.com>
Subject: [PATCH] firmware: stratix10-rsu: correctly report unsupported DCMF commands

On older firmware that doesn't support DCMF commands, driver will
otherwise report those as failed to read, instead of unsupported.

Signed-off-by: Beniamin Sandu <beniaminsandu@...il.com>
---
 drivers/firmware/stratix10-rsu.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/firmware/stratix10-rsu.c b/drivers/firmware/stratix10-rsu.c
index 4f7a7abada48..291a14db61c2 100644
--- a/drivers/firmware/stratix10-rsu.c
+++ b/drivers/firmware/stratix10-rsu.c
@@ -235,7 +235,9 @@ static void rsu_dcmf_version_callback(struct stratix10_svc_client *client,
 		priv->dcmf_version.dcmf1 = FIELD_GET(RSU_DCMF1_MASK, *value1);
 		priv->dcmf_version.dcmf2 = FIELD_GET(RSU_DCMF2_MASK, *value2);
 		priv->dcmf_version.dcmf3 = FIELD_GET(RSU_DCMF3_MASK, *value2);
-	} else
+	} else if (data->status == BIT(SVC_STATUS_NO_SUPPORT))
+		dev_warn(client->dev, "Secure FW doesn't support DCMF version.")
+	else
 		dev_err(client->dev, "failed to get DCMF version\n");
 
 	complete(&priv->completion);
@@ -264,7 +266,9 @@ static void rsu_dcmf_status_callback(struct stratix10_svc_client *client,
 						    *value);
 		priv->dcmf_status.dcmf3 = FIELD_GET(RSU_DCMF3_STATUS_MASK,
 						    *value);
-	} else
+	} else if (data->status == BIT(SVC_STATUS_NO_SUPPORT))
+		dev_warn(client->dev, "Secure FW doesn't support DCMF status.")
+	else
 		dev_err(client->dev, "failed to get DCMF status\n");
 
 	complete(&priv->completion);
-- 
2.34.1