diff options
| author | Mika Westerberg <mika.westerberg@linux.intel.com> | 2018-09-27 16:56:49 -0500 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2018-10-02 16:04:40 -0500 |
| commit | 0e157e52860441cb26051f131dd0b5ae3187a07b (patch) | |
| tree | 9f386af68fe3c4e6c2e44b95b60d151f428814ae /drivers/pci | |
| parent | 9c62f0bfb83260cb2469eb84d3185c9728e36900 (diff) | |
| download | linux-0e157e52860441cb26051f131dd0b5ae3187a07b.tar.bz2 | |
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>
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/pcie/pme.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/pci/pcie/pme.c b/drivers/pci/pcie/pme.c index 1a8b85051b1b..0dbcf429089f 100644 --- a/drivers/pci/pcie/pme.c +++ b/drivers/pci/pcie/pme.c @@ -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, }; |