linux-kernel - [PATCH 11/15] habanalabs: no consecutive err when user context is enabled

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Message-Id: <20221027091007.664797-11-ogabbay@kernel.org>
Date:   Thu, 27 Oct 2022 12:10:03 +0300
From:   Oded Gabbay <ogabbay@...nel.org>
To:     linux-kernel@...r.kernel.org
Cc:     Tal Cohen <talcohen@...ana.ai>
Subject: [PATCH 11/15] habanalabs: no consecutive err when user context is enabled

From: Tal Cohen <talcohen@...ana.ai>

Consecutive error protects a device reset loop from being triggered
due to h/w issues and enters the device into an unavailable state.
When user may cause the error, an unavailable state
will prevent the user from running its workloads.

The commit prevents entering consecutive state when a user context
is enabled.

Signed-off-by: Tal Cohen <talcohen@...ana.ai>
Reviewed-by: Oded Gabbay <ogabbay@...nel.org>
Signed-off-by: Oded Gabbay <ogabbay@...nel.org>
---
 drivers/misc/habanalabs/common/device.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/misc/habanalabs/common/device.c b/drivers/misc/habanalabs/common/device.c
index bcd959924971..61ddcb1ce508 100644
--- a/drivers/misc/habanalabs/common/device.c
+++ b/drivers/misc/habanalabs/common/device.c
@@ -1320,6 +1320,10 @@ static void handle_reset_trigger(struct hl_device *hdev, u32 flags)
 {
 	u32 cur_reset_trigger = HL_RESET_TRIGGER_DEFAULT;
 
+	/* No consecutive mechanism when user context exists */
+	if (hdev->is_compute_ctx_active)
+		return;
+
 	/*
 	 * 'reset cause' is being updated here, because getting here
 	 * means that it's the 1st time and the last time we're here
-- 
2.25.1