linux-kernel - [PATCH] habanalabs: unmap PCI bars upon iATU failure

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Message-Id: <20200730112134.17448-1-oded.gabbay@gmail.com>
Date:   Thu, 30 Jul 2020 14:21:34 +0300
From:   Oded Gabbay <oded.gabbay@...il.com>
To:     linux-kernel@...r.kernel.org, SW_Drivers@...ana.ai
Cc:     Ofir Bitton <obitton@...ana.ai>
Subject: [PATCH] habanalabs: unmap PCI bars upon iATU failure

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

In case the driver fails to configure the PCI controller iATU, it needs to
unmap the PCI bars before exiting so if the driver is removed, the bars
won't be left mapped.

Signed-off-by: Ofir Bitton <obitton@...ana.ai>
Reviewed-by: Oded Gabbay <oded.gabbay@...il.com>
Signed-off-by: Oded Gabbay <oded.gabbay@...il.com>
---
 drivers/misc/habanalabs/common/pci.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/misc/habanalabs/common/pci.c b/drivers/misc/habanalabs/common/pci.c
index 7bd3737571f3..b8184cb49034 100644
--- a/drivers/misc/habanalabs/common/pci.c
+++ b/drivers/misc/habanalabs/common/pci.c
@@ -369,15 +369,17 @@ int hl_pci_init(struct hl_device *hdev)
 	rc = hdev->asic_funcs->init_iatu(hdev);
 	if (rc) {
 		dev_err(hdev->dev, "Failed to initialize iATU\n");
-		goto disable_device;
+		goto unmap_pci_bars;
 	}
 
 	rc = hl_pci_set_dma_mask(hdev);
 	if (rc)
-		goto disable_device;
+		goto unmap_pci_bars;
 
 	return 0;
 
+unmap_pci_bars:
+	hl_pci_bars_unmap(hdev);
 disable_device:
 	pci_clear_master(pdev);
 	pci_disable_device(pdev);
-- 
2.17.1