diff options
| author | Bjorn Helgaas <bhelgaas@google.com> | 2019-01-02 15:31:05 -0600 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2019-01-02 15:31:05 -0600 |
| commit | 6f7cebea6b13d178ad9066bb3e190150cdfe9c75 (patch) | |
| tree | 8d3b56db4c19a63701de26c989a9d094a56567f6 /drivers/pci | |
| parent | baa12e5f3acb3cd500c85c4be2c97e769af199fd (diff) | |
| parent | c5eb1190074cfb14c5d9cac692f1912eecf1a5e4 (diff) | |
| download | linux-6f7cebea6b13d178ad9066bb3e190150cdfe9c75.tar.bz2 | |
Merge branch 'pci/pm'
- Allow runtime PM even if driver doesn't supply callbacks (Jarkko
Nikula)
* pci/pm:
PCI / PM: Allow runtime PM without callback functions
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/pci-driver.c | 27 |
1 files changed, 12 insertions, 15 deletions
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c index bef17c3fca67..33f3f475e5c6 100644 --- a/drivers/pci/pci-driver.c +++ b/drivers/pci/pci-driver.c @@ -1251,30 +1251,29 @@ static int pci_pm_runtime_suspend(struct device *dev) return 0; } - if (!pm || !pm->runtime_suspend) - return -ENOSYS; - pci_dev->state_saved = false; - error = pm->runtime_suspend(dev); - if (error) { + if (pm && pm->runtime_suspend) { + error = pm->runtime_suspend(dev); /* * -EBUSY and -EAGAIN is used to request the runtime PM core * to schedule a new suspend, so log the event only with debug * log level. */ - if (error == -EBUSY || error == -EAGAIN) + if (error == -EBUSY || error == -EAGAIN) { dev_dbg(dev, "can't suspend now (%pf returned %d)\n", pm->runtime_suspend, error); - else + return error; + } else if (error) { dev_err(dev, "can't suspend (%pf returned %d)\n", pm->runtime_suspend, error); - - return error; + return error; + } } pci_fixup_device(pci_fixup_suspend, pci_dev); - if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 + if (pm && pm->runtime_suspend + && !pci_dev->state_saved && pci_dev->current_state != PCI_D0 && pci_dev->current_state != PCI_UNKNOWN) { WARN_ONCE(pci_dev->current_state != prev, "PCI PM: State of device not saved by %pF\n", @@ -1292,7 +1291,7 @@ static int pci_pm_runtime_suspend(struct device *dev) static int pci_pm_runtime_resume(struct device *dev) { - int rc; + int rc = 0; struct pci_dev *pci_dev = to_pci_dev(dev); const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; @@ -1306,14 +1305,12 @@ static int pci_pm_runtime_resume(struct device *dev) if (!pci_dev->driver) return 0; - if (!pm || !pm->runtime_resume) - return -ENOSYS; - pci_fixup_device(pci_fixup_resume_early, pci_dev); pci_enable_wake(pci_dev, PCI_D0, false); pci_fixup_device(pci_fixup_resume, pci_dev); - rc = pm->runtime_resume(dev); + if (pm && pm->runtime_resume) + rc = pm->runtime_resume(dev); pci_dev->runtime_d3cold = false; |