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scsi: qedi: Fix firmware halt over suspend and resume
commit1516ee035d
upstream. 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:ace7f46ba5
("scsi: qedi: Add QLogic FastLinQ offload iSCSI driver framework.") Signed-off-by: Nilesh Javali <njavali@marvell.com> Link: https://lore.kernel.org/r/20230807093725.46829-2-njavali@marvell.com Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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1 changed files with 18 additions and 0 deletions
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@ -69,6 +69,7 @@ static struct nvm_iscsi_block *qedi_get_nvram_block(struct qedi_ctx *qedi);
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static void qedi_recovery_handler(struct work_struct *work);
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static void qedi_schedule_hw_err_handler(void *dev,
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enum qed_hw_err_type err_type);
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static int qedi_suspend(struct pci_dev *pdev, pm_message_t state);
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static int qedi_iscsi_event_cb(void *context, u8 fw_event_code, void *fw_handle)
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{
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@ -2515,6 +2516,22 @@ static void qedi_shutdown(struct pci_dev *pdev)
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__qedi_remove(pdev, QEDI_MODE_SHUTDOWN);
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}
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static int qedi_suspend(struct pci_dev *pdev, pm_message_t state)
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{
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struct qedi_ctx *qedi;
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if (!pdev) {
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QEDI_ERR(NULL, "pdev is NULL.\n");
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return -ENODEV;
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}
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qedi = pci_get_drvdata(pdev);
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QEDI_ERR(&qedi->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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static int __qedi_probe(struct pci_dev *pdev, int mode)
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{
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struct qedi_ctx *qedi;
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@ -2873,6 +2890,7 @@ static struct pci_driver qedi_pci_driver = {
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.remove = qedi_remove,
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.shutdown = qedi_shutdown,
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.err_handler = &qedi_err_handler,
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.suspend = qedi_suspend,
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};
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static int __init qedi_init(void)
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