linux-kernel - [PATCH 2/2] habanalabs/gaudi2: mark PCIE access error as fatal

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Message-Id: <20220721084150.4147483-2-ogabbay@kernel.org>
Date:   Thu, 21 Jul 2022 11:41:50 +0300
From:   Oded Gabbay <ogabbay@...nel.org>
To:     linux-kernel@...r.kernel.org
Cc:     Tomer Tayar <ttayar@...ana.ai>
Subject: [PATCH 2/2] habanalabs/gaudi2: mark PCIE access error as fatal

From: Tomer Tayar <ttayar@...ana.ai>

F/W events are enabled in a late phase of the device init, so an event
for a PCIE access error during the init, can be received after the init
is already done and considered as successful.
A resulting device reset, which does the same H/W init, can end
similarly with this event right after the reset is done and considered
as successful, and a loop of this sequence can continue.

To avoid it mark the PCIE access error as a fatal event, so after 2
consecutive events no more resets will be done.

Signed-off-by: Tomer Tayar <ttayar@...ana.ai>
Reviewed-by: Oded Gabbay <ogabbay@...nel.org>
Signed-off-by: Oded Gabbay <ogabbay@...nel.org>
---
 drivers/misc/habanalabs/gaudi2/gaudi2.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/misc/habanalabs/gaudi2/gaudi2.c b/drivers/misc/habanalabs/gaudi2/gaudi2.c
index 2c43ed403509..68ab407fa6ba 100644
--- a/drivers/misc/habanalabs/gaudi2/gaudi2.c
+++ b/drivers/misc/habanalabs/gaudi2/gaudi2.c
@@ -8532,6 +8532,7 @@ static void gaudi2_handle_eqe(struct hl_device *hdev, struct hl_eq_entry *eq_ent
 	case GAUDI2_EVENT_PCIE_ADDR_DEC_ERR:
 		gaudi2_print_pcie_addr_dec_info(hdev,
 				le64_to_cpu(eq_entry->intr_cause.intr_cause_data));
+		reset_flags |= HL_DRV_RESET_FW_FATAL_ERR;
 		break;
 
 	case GAUDI2_EVENT_HMMU0_PAGE_FAULT_OR_WR_PERM ... GAUDI2_EVENT_HMMU12_SECURITY_ERROR:
-- 
2.25.1