Commit 7e24bc34 authored by Bjorn Helgaas's avatar Bjorn Helgaas

PCI/PM: Apply D2 delay as milliseconds, not microseconds

PCI_PM_D2_DELAY is defined as 200, which is milliseconds, but previously we
used udelay(), which only waited for 200 microseconds.  Use msleep()
instead so we wait the correct amount of time.  See PCIe r5.0, sec 5.9.

Link: https://lore.kernel.org/r/20191101204558.210235-2-helgaas@kernel.orgSigned-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
Reviewed-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 12bcae44
...@@ -886,7 +886,7 @@ static int pci_raw_set_power_state(struct pci_dev *dev, pci_power_t state) ...@@ -886,7 +886,7 @@ static int pci_raw_set_power_state(struct pci_dev *dev, pci_power_t state)
if (state == PCI_D3hot || dev->current_state == PCI_D3hot) if (state == PCI_D3hot || dev->current_state == PCI_D3hot)
pci_dev_d3_sleep(dev); pci_dev_d3_sleep(dev);
else if (state == PCI_D2 || dev->current_state == PCI_D2) else if (state == PCI_D2 || dev->current_state == PCI_D2)
udelay(PCI_PM_D2_DELAY); msleep(PCI_PM_D2_DELAY);
pci_read_config_word(dev, dev->pm_cap + PCI_PM_CTRL, &pmcsr); pci_read_config_word(dev, dev->pm_cap + PCI_PM_CTRL, &pmcsr);
dev->current_state = (pmcsr & PCI_PM_CTRL_STATE_MASK); dev->current_state = (pmcsr & PCI_PM_CTRL_STATE_MASK);
......
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