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scsi: qedf: Fix firmware halt over suspend and resume
While performing certain power-off sequences, PCI drivers are called to
suspend and resume their underlying devices through PCI PM (power
management) interface. However the hardware does not support PCI PM
suspend/resume operations so system wide suspend/resume leads to bad MFW
(management firmware) state which causes various follow-up errors in driver
when communicating with the device/firmware.
To fix this driver implements PCI PM suspend handler to indicate
unsupported operation to the PCI subsystem explicitly, thus avoiding system
to go into suspended/standby mode.
Fixes: 61d8658b4a
("scsi: qedf: Add QLogic FastLinQ offload FCoE driver framework.")
Signed-off-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Link: https://lore.kernel.org/r/20230807093725.46829-1-njavali@marvell.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
parent
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commit
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1 changed files with 18 additions and 0 deletions
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@ -31,6 +31,7 @@ static void qedf_remove(struct pci_dev *pdev);
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static void qedf_shutdown(struct pci_dev *pdev);
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static void qedf_schedule_recovery_handler(void *dev);
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static void qedf_recovery_handler(struct work_struct *work);
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static int qedf_suspend(struct pci_dev *pdev, pm_message_t state);
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/*
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* Driver module parameters.
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@ -3271,6 +3272,7 @@ static struct pci_driver qedf_pci_driver = {
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.probe = qedf_probe,
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.remove = qedf_remove,
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.shutdown = qedf_shutdown,
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.suspend = qedf_suspend,
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};
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static int __qedf_probe(struct pci_dev *pdev, int mode)
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@ -4000,6 +4002,22 @@ static void qedf_shutdown(struct pci_dev *pdev)
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__qedf_remove(pdev, QEDF_MODE_NORMAL);
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}
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static int qedf_suspend(struct pci_dev *pdev, pm_message_t state)
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{
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struct qedf_ctx *qedf;
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if (!pdev) {
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QEDF_ERR(NULL, "pdev is NULL.\n");
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return -ENODEV;
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}
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qedf = pci_get_drvdata(pdev);
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QEDF_ERR(&qedf->dbg_ctx, "%s: Device does not support suspend operation\n", __func__);
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return -EPERM;
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}
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/*
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* Recovery handler code
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*/
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