linux-kernel - [PATCH 14/15] habanalabs: add warning print upon a PCI error

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Date:   Thu, 27 Oct 2022 12:10:06 +0300
From:   Oded Gabbay <ogabbay@...nel.org>
To:     linux-kernel@...r.kernel.org
Cc:     Ofir Bitton <obitton@...ana.ai>
Subject: [PATCH 14/15] habanalabs: add warning print upon a PCI error

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

In order to know if driver catches PCI errors correctly, we need to
print a warning per each error.

Signed-off-by: Ofir Bitton <obitton@...ana.ai>
Reviewed-by: Oded Gabbay <ogabbay@...nel.org>
Signed-off-by: Oded Gabbay <ogabbay@...nel.org>
---
 drivers/misc/habanalabs/common/habanalabs_drv.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/misc/habanalabs/common/habanalabs_drv.c b/drivers/misc/habanalabs/common/habanalabs_drv.c
index 714994725224..e82af8989700 100644
--- a/drivers/misc/habanalabs/common/habanalabs_drv.c
+++ b/drivers/misc/habanalabs/common/habanalabs_drv.c
@@ -595,15 +595,16 @@ hl_pci_err_detected(struct pci_dev *pdev, pci_channel_state_t state)
 
 	switch (state) {
 	case pci_channel_io_normal:
+		dev_warn(hdev->dev, "PCI normal state error detected\n");
 		return PCI_ERS_RESULT_CAN_RECOVER;
 
 	case pci_channel_io_frozen:
-		dev_warn(hdev->dev, "frozen state error detected\n");
+		dev_warn(hdev->dev, "PCI frozen state error detected\n");
 		result = PCI_ERS_RESULT_NEED_RESET;
 		break;
 
 	case pci_channel_io_perm_failure:
-		dev_warn(hdev->dev, "failure state error detected\n");
+		dev_warn(hdev->dev, "PCI failure state error detected\n");
 		result = PCI_ERS_RESULT_DISCONNECT;
 		break;
 
@@ -639,6 +640,10 @@ static void hl_pci_err_resume(struct pci_dev *pdev)
  */
 static pci_ers_result_t hl_pci_err_slot_reset(struct pci_dev *pdev)
 {
+	struct hl_device *hdev = pci_get_drvdata(pdev);
+
+	dev_warn(hdev->dev, "PCI slot reset detected\n");
+
 	return PCI_ERS_RESULT_RECOVERED;
 }
 
-- 
2.25.1