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authorVaibhav Gupta <vaibhavgupta40@gmail.com>2020-11-02 22:17:27 +0530
committerMartin K. Petersen <martin.petersen@oracle.com>2020-11-25 23:23:22 -0500
commit0572edbc32c56ca8863e5849051f9dfd06fd38b9 (patch)
tree9c958cc2d038eb0839b0e7b6e07f4e43135ea391 /drivers/scsi/mvumi.c
parentbd7463cdbe1af0e6d120defcbe9cf0e6eb0729c7 (diff)
scsi: mvumi: 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/20201102164730.324035-27-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/mvumi.c')
-rw-r--r--drivers/scsi/mvumi.c46
1 files changed, 9 insertions, 37 deletions
diff --git a/drivers/scsi/mvumi.c b/drivers/scsi/mvumi.c
index 1d92c4da0c92..aa31ff7d8630 100644
--- a/drivers/scsi/mvumi.c
+++ b/drivers/scsi/mvumi.c
@@ -2567,48 +2567,28 @@ static void mvumi_shutdown(struct pci_dev *pdev)
mvumi_flush_cache(mhba);
}
-static int __maybe_unused mvumi_suspend(struct pci_dev *pdev, pm_message_t state)
+static int __maybe_unused mvumi_suspend(struct device *dev)
{
- struct mvumi_hba *mhba = NULL;
+ struct pci_dev *pdev = to_pci_dev(dev);
+ struct mvumi_hba *mhba = pci_get_drvdata(pdev);
- mhba = pci_get_drvdata(pdev);
mvumi_flush_cache(mhba);
- pci_set_drvdata(pdev, mhba);
mhba->instancet->disable_intr(mhba);
- free_irq(mhba->pdev->irq, mhba);
mvumi_unmap_pci_addr(pdev, mhba->base_addr);
- pci_release_regions(pdev);
- pci_save_state(pdev);
- pci_disable_device(pdev);
- pci_set_power_state(pdev, pci_choose_state(pdev, state));
return 0;
}
-static int __maybe_unused mvumi_resume(struct pci_dev *pdev)
+static int __maybe_unused mvumi_resume(struct device *dev)
{
int ret;
- struct mvumi_hba *mhba = NULL;
-
- mhba = pci_get_drvdata(pdev);
-
- pci_set_power_state(pdev, PCI_D0);
- pci_restore_state(pdev);
-
- ret = pci_enable_device(pdev);
- if (ret) {
- dev_err(&pdev->dev, "enable device failed\n");
- return ret;
- }
+ struct pci_dev *pdev = to_pci_dev(dev);
+ struct mvumi_hba *mhba = pci_get_drvdata(pdev);
- ret = mvumi_pci_set_master(pdev);
ret = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
if (ret)
goto fail;
- ret = pci_request_regions(mhba->pdev, MV_DRIVER_NAME);
- if (ret)
- goto fail;
ret = mvumi_map_pci_addr(mhba->pdev, mhba->base_addr);
if (ret)
goto release_regions;
@@ -2626,12 +2606,6 @@ static int __maybe_unused mvumi_resume(struct pci_dev *pdev)
goto unmap_pci_addr;
}
- ret = request_irq(mhba->pdev->irq, mvumi_isr_handler, IRQF_SHARED,
- "mvumi", mhba);
- if (ret) {
- dev_err(&pdev->dev, "failed to register IRQ\n");
- goto unmap_pci_addr;
- }
mhba->instancet->enable_intr(mhba);
return 0;
@@ -2641,11 +2615,12 @@ unmap_pci_addr:
release_regions:
pci_release_regions(pdev);
fail:
- pci_disable_device(pdev);
return ret;
}
+static SIMPLE_DEV_PM_OPS(mvumi_pm_ops, mvumi_suspend, mvumi_resume);
+
static struct pci_driver mvumi_pci_driver = {
.name = MV_DRIVER_NAME,
@@ -2653,10 +2628,7 @@ static struct pci_driver mvumi_pci_driver = {
.probe = mvumi_probe_one,
.remove = mvumi_detach_one,
.shutdown = mvumi_shutdown,
-#ifdef CONFIG_PM
- .suspend = mvumi_suspend,
- .resume = mvumi_resume,
-#endif
+ .driver.pm = &mvumi_pm_ops,
};
module_pci_driver(mvumi_pci_driver);