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PCI/PME: Implement runtime PM callbacks 

Basically we need to do the same steps than what we do when system sleep is
entered and disable PME interrupt when the root port is runtime suspended.
This prevents spurious wakeups immediately when the port is transitioned
into D3cold.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Mika Westerberg 2018-09-27 16:56:49 -05:00 committed by Bjorn Helgaas
parent 9c62f0bfb8
commit 0e157e5286
1 changed files with 27 additions and 0 deletions
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27
drivers/pci/pcie/pme.c
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@ -432,6 +432,31 @@ static void pcie_pme_remove(struct pcie_device *srv)
kfree(get_service_data(srv));
}
static int pcie_pme_runtime_suspend(struct pcie_device *srv)
{
struct pcie_pme_service_data *data = get_service_data(srv);
spin_lock_irq(&data->lock);
pcie_pme_interrupt_enable(srv->port, false);
pcie_clear_root_pme_status(srv->port);
data->noirq = true;
spin_unlock_irq(&data->lock);
return 0;
}
static int pcie_pme_runtime_resume(struct pcie_device *srv)
{
struct pcie_pme_service_data *data = get_service_data(srv);
spin_lock_irq(&data->lock);
pcie_pme_interrupt_enable(srv->port, true);
data->noirq = false;
spin_unlock_irq(&data->lock);
return 0;
}
static struct pcie_port_service_driver pcie_pme_driver = {
.name = "pcie_pme",
.port_type = PCI_EXP_TYPE_ROOT_PORT,
@ -439,6 +464,8 @@ static struct pcie_port_service_driver pcie_pme_driver = {
.probe = pcie_pme_probe,
.suspend = pcie_pme_suspend,
.runtime_suspend = pcie_pme_runtime_suspend,
.runtime_resume = pcie_pme_runtime_resume,
.resume = pcie_pme_resume,
.remove = pcie_pme_remove,
};