linux-kernel - [PATCH 1/2] habanalabs: rate limit multi CS completion errors

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Date:   Mon, 13 Sep 2021 22:11:45 +0300
From:   Oded Gabbay <ogabbay@...nel.org>
To:     linux-kernel@...r.kernel.org
Cc:     Ofir Bitton <obitton@...ana.ai>
Subject: [PATCH 1/2] habanalabs: rate limit multi CS completion errors

From: Ofir Bitton <obitton@...ana.ai>

As user can send wrong arguments to multi CS API, we rate limit
the amount of errors dumped to dmesg, in addition we change the
severity to warning.

Signed-off-by: Ofir Bitton <obitton@...ana.ai>
Reviewed-by: Oded Gabbay <ogabbay@...nel.org>
Signed-off-by: Oded Gabbay <ogabbay@...nel.org>
---
 drivers/misc/habanalabs/common/command_submission.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/misc/habanalabs/common/command_submission.c b/drivers/misc/habanalabs/common/command_submission.c
index 5b7de857fbc1..a4ed91ed991d 100644
--- a/drivers/misc/habanalabs/common/command_submission.c
+++ b/drivers/misc/habanalabs/common/command_submission.c
@@ -2630,7 +2630,8 @@ static int hl_multi_cs_wait_ioctl(struct hl_fpriv *hpriv, void *data)
 		 * completed after the poll function.
 		 */
 		if (!mcs_data.completion_bitmap) {
-			dev_err(hdev->dev, "Multi-CS got completion on wait but no CS completed\n");
+			dev_warn_ratelimited(hdev->dev,
+				"Multi-CS got completion on wait but no CS completed\n");
 			rc = -EFAULT;
 		}
 	}
-- 
2.17.1