From: Nilesh Javali njavali@marvell.com
commit 1516ee035df32115197cd93ae3619dba7b020986 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: ace7f46ba5fd ("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 --- drivers/scsi/qedi/qedi_main.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+)
--- a/drivers/scsi/qedi/qedi_main.c +++ b/drivers/scsi/qedi/qedi_main.c @@ -69,6 +69,7 @@ static struct nvm_iscsi_block *qedi_get_ static void qedi_recovery_handler(struct work_struct *work); static void qedi_schedule_hw_err_handler(void *dev, enum qed_hw_err_type err_type); +static int qedi_suspend(struct pci_dev *pdev, pm_message_t state);
static int qedi_iscsi_event_cb(void *context, u8 fw_event_code, void *fw_handle) { @@ -2515,6 +2516,22 @@ static void qedi_shutdown(struct pci_dev __qedi_remove(pdev, QEDI_MODE_SHUTDOWN); }
+static int qedi_suspend(struct pci_dev *pdev, pm_message_t state) +{ + struct qedi_ctx *qedi; + + if (!pdev) { + QEDI_ERR(NULL, "pdev is NULL.\n"); + return -ENODEV; + } + + qedi = pci_get_drvdata(pdev); + + QEDI_ERR(&qedi->dbg_ctx, "%s: Device does not support suspend operation\n", __func__); + + return -EPERM; +} + static int __qedi_probe(struct pci_dev *pdev, int mode) { struct qedi_ctx *qedi; @@ -2873,6 +2890,7 @@ static struct pci_driver qedi_pci_driver .remove = qedi_remove, .shutdown = qedi_shutdown, .err_handler = &qedi_err_handler, + .suspend = qedi_suspend, };
static int __init qedi_init(void)