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| author |   Bjorn Helgaas <bhelgaas@google.com> | 2019-10-23 17:40:52 -0500 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2019-11-20 17:34:26 -0600 |
| commit | 7e24bc347e57992d532bc2ed700209b0fc0a4bf5 (patch) | |
| tree | ee4575c280274445a32790771066bf3403679f3f /drivers/pci/pci.c | |
| parent | PCI/PM: Use pci_WARN() to include device information (diff) | |
| download | wireguard-linux-7e24bc347e57992d532bc2ed700209b0fc0a4bf5.tar.xz wireguard-linux-7e24bc347e57992d532bc2ed700209b0fc0a4bf5.zip | |
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.org
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/pci/pci.c')
| -rw-r--r-- | drivers/pci/pci.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index a97e2571a527..4dfbde4f944e 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -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) pci_dev_d3_sleep(dev); 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); dev->current_state = (pmcsr & PCI_PM_CTRL_STATE_MASK); |