From a37e47192dfa98f79a0cd5ab991c224b5980c982 Mon Sep 17 00:00:00 2001
From: Omer Shpigelman <oshpigelman@habana.ai>
Date: Sun, 5 Jan 2020 09:05:45 +0000
Subject: [PATCH] habanalabs: do not halt CoreSight during hard reset
Git-commit: a37e47192dfa98f79a0cd5ab991c224b5980c982
Patch-mainline: v5.6-rc3
References: git-fixes
During hard reset we must not write to the device.
Hence avoid halting CoreSight during user context close if it is done
during hard reset.
In addition, we must not re-enable clock gating afterwards as it was
deliberately disabled in the beginning of the hard reset flow.
Signed-off-by: Omer Shpigelman <oshpigelman@habana.ai>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/misc/habanalabs/device.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/misc/habanalabs/device.c b/drivers/misc/habanalabs/device.c
index 166883b64725..b680b0caa69b 100644
--- a/drivers/misc/habanalabs/device.c
+++ b/drivers/misc/habanalabs/device.c
@@ -598,7 +598,9 @@ int hl_device_set_debug_mode(struct hl_device *hdev, bool enable)
goto out;
}
- hdev->asic_funcs->halt_coresight(hdev);
+ if (!hdev->hard_reset_pending)
+ hdev->asic_funcs->halt_coresight(hdev);
+
hdev->in_debug = 0;
goto out;
--
2.16.4