linux-kernel - [PATCH 1/4] habanalabs: ignore device unusable status

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Message-Id: <20210502155140.4359-1-ogabbay@kernel.org>
Date:   Sun,  2 May 2021 18:51:37 +0300
From:   Oded Gabbay <ogabbay@...nel.org>
To:     linux-kernel@...r.kernel.org
Subject: [PATCH 1/4] habanalabs: ignore device unusable status

Some users might want to implement their own policy of when the device
is unusable so we need to ignore this status in the driver and continue
loading as normal.

Signed-off-by: Oded Gabbay <ogabbay@...nel.org>
---
 drivers/misc/habanalabs/common/firmware_if.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/misc/habanalabs/common/firmware_if.c b/drivers/misc/habanalabs/common/firmware_if.c
index fc10cc06f401..a265753f2a53 100644
--- a/drivers/misc/habanalabs/common/firmware_if.c
+++ b/drivers/misc/habanalabs/common/firmware_if.c
@@ -441,9 +441,9 @@ static int fw_read_errors(struct hl_device *hdev, u32 boot_err0_reg,
 	}
 
 	if (err_val & CPU_BOOT_ERR0_DEVICE_UNUSABLE_FAIL) {
-		dev_err(hdev->dev,
-			"Device boot error - device unusable\n");
-		err_exists = true;
+		/* Ignore this bit, don't prevent driver loading */
+		dev_dbg(hdev->dev, "device unusable status is set\n");
+		err_val &= ~CPU_BOOT_ERR0_DEVICE_UNUSABLE_FAIL;
 	}
 
 	security_val = RREG32(cpu_security_boot_status_reg);
-- 
2.25.1