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authorVaibhav Gupta <vaibhavgupta40@gmail.com>2020-11-02 22:17:03 +0530
committerMartin K. Petersen <martin.petersen@oracle.com>2020-11-25 23:14:29 -0500
commit977001df03683b0209e56324b51d96ca5362c019 (patch)
tree645119a966c05293466302f3506bd139e416676d /drivers/scsi/megaraid
parent8ed9d987c6d9c7f262a764c56c27d74a906475f0 (diff)
scsi: megaraid_sas: Use generic power management
Drivers should do only device-specific jobs. But in general, drivers using legacy PCI PM framework for .suspend()/.resume() have to manage many PCI PM-related tasks themselves which can be done by PCI Core itself. This brings extra load on the driver and it directly calls PCI helper functions to handle them. Switch to the new generic framework by updating function signatures and define a "struct dev_pm_ops" variable to bind PM callbacks. Also, remove unnecessary calls to the PCI Helper functions along with the legacy .suspend & .resume bindings. Link: https://lore.kernel.org/r/20201102164730.324035-3-vaibhavgupta40@gmail.com Signed-off-by: Vaibhav Gupta <vaibhavgupta40@gmail.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/megaraid')
-rw-r--r--drivers/scsi/megaraid/megaraid_sas_base.c51
1 files changed, 13 insertions, 38 deletions
diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c
index 017f2540785a..f8ec413d47a0 100644
--- a/drivers/scsi/megaraid/megaraid_sas_base.c
+++ b/drivers/scsi/megaraid/megaraid_sas_base.c
@@ -7593,25 +7593,23 @@ static void megasas_shutdown_controller(struct megasas_instance *instance,
megasas_return_cmd(instance, cmd);
}
-#ifdef CONFIG_PM
/**
* megasas_suspend - driver suspend entry point
- * @pdev: PCI device structure
- * @state: PCI power state to suspend routine
+ * @dev: Device structure
*/
-static int
-megasas_suspend(struct pci_dev *pdev, pm_message_t state)
+static int __maybe_unused
+megasas_suspend(struct device *dev)
{
struct megasas_instance *instance;
- instance = pci_get_drvdata(pdev);
+ instance = dev_get_drvdata(dev);
if (!instance)
return 0;
instance->unload = 1;
- dev_info(&pdev->dev, "%s is called\n", __func__);
+ dev_info(dev, "%s is called\n", __func__);
/* Shutdown SR-IOV heartbeat timer */
if (instance->requestorId && !instance->skip_heartbeat_timer_del)
@@ -7641,47 +7639,29 @@ megasas_suspend(struct pci_dev *pdev, pm_message_t state)
if (instance->msix_vectors)
pci_free_irq_vectors(instance->pdev);
- pci_save_state(pdev);
- pci_disable_device(pdev);
-
- pci_set_power_state(pdev, pci_choose_state(pdev, state));
-
return 0;
}
/**
* megasas_resume- driver resume entry point
- * @pdev: PCI device structure
+ * @dev: Device structure
*/
-static int
-megasas_resume(struct pci_dev *pdev)
+static int __maybe_unused
+megasas_resume(struct device *dev)
{
int rval;
struct Scsi_Host *host;
struct megasas_instance *instance;
u32 status_reg;
- instance = pci_get_drvdata(pdev);
+ instance = dev_get_drvdata(dev);
if (!instance)
return 0;
host = instance->host;
- pci_set_power_state(pdev, PCI_D0);
- pci_restore_state(pdev);
-
- dev_info(&pdev->dev, "%s is called\n", __func__);
- /*
- * PCI prepping: enable device set bus mastering and dma mask
- */
- rval = pci_enable_device_mem(pdev);
- if (rval) {
- dev_err(&pdev->dev, "Enable device failed\n");
- return rval;
- }
-
- pci_set_master(pdev);
+ dev_info(dev, "%s is called\n", __func__);
/*
* We expect the FW state to be READY
@@ -7807,14 +7787,8 @@ fail_reenable_msix:
fail_set_dma_mask:
fail_ready_state:
- pci_disable_device(pdev);
-
return -ENODEV;
}
-#else
-#define megasas_suspend NULL
-#define megasas_resume NULL
-#endif
static inline int
megasas_wait_for_adapter_operational(struct megasas_instance *instance)
@@ -8552,6 +8526,8 @@ static const struct file_operations megasas_mgmt_fops = {
.llseek = noop_llseek,
};
+static SIMPLE_DEV_PM_OPS(megasas_pm_ops, megasas_suspend, megasas_resume);
+
/*
* PCI hotplug support registration structure
*/
@@ -8561,8 +8537,7 @@ static struct pci_driver megasas_pci_driver = {
.id_table = megasas_pci_table,
.probe = megasas_probe_one,
.remove = megasas_detach_one,
- .suspend = megasas_suspend,
- .resume = megasas_resume,
+ .driver.pm = &megasas_pm_ops,
.shutdown = megasas_shutdown,
};