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PCI: portdrv: Deduplicate PM callback iterator 

Replace suspend_iter() and resume_iter() with a single function pm_iter()
to allow addition of port service callbacks for further power management
phases without having to add another iterator each time.

No functional change intended.

Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Lukas Wunner 2018-07-19 17:27:52 -05:00 committed by Bjorn Helgaas
parent 5b3f7b7d06
commit 6ccb127ba6
1 changed files with 12 additions and 18 deletions
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30
drivers/pci/pcie/portdrv_core.c
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@ -353,14 +353,19 @@ error_disable:
}
#ifdef CONFIG_PM
static int suspend_iter(struct device *dev, void *data)
typedef int (*pcie_pm_callback_t)(struct pcie_device *);
static int pm_iter(struct device *dev, void *data)
{
struct pcie_port_service_driver *service_driver;
size_t offset = *(size_t *)data;
pcie_pm_callback_t cb;
if ((dev->bus == &pcie_port_bus_type) && dev->driver) {
service_driver = to_service_driver(dev->driver);
if (service_driver->suspend)
service_driver->suspend(to_pcie_device(dev));
cb = *(pcie_pm_callback_t *)((void *)service_driver + offset);
if (cb)
return cb(to_pcie_device(dev));
}
return 0;
}
@ -371,20 +376,8 @@ static int suspend_iter(struct device *dev, void *data)
*/
int pcie_port_device_suspend(struct device *dev)
{
return device_for_each_child(dev, NULL, suspend_iter);
}
static int resume_iter(struct device *dev, void *data)
{
struct pcie_port_service_driver *service_driver;
if ((dev->bus == &pcie_port_bus_type) &&
(dev->driver)) {
service_driver = to_service_driver(dev->driver);
if (service_driver->resume)
service_driver->resume(to_pcie_device(dev));
}
return 0;
size_t off = offsetof(struct pcie_port_service_driver, suspend);
return device_for_each_child(dev, &off, pm_iter);
}
/**
@ -393,7 +386,8 @@ static int resume_iter(struct device *dev, void *data)
*/
int pcie_port_device_resume(struct device *dev)
{
return device_for_each_child(dev, NULL, resume_iter);
size_t off = offsetof(struct pcie_port_service_driver, resume);
return device_for_each_child(dev, &off, pm_iter);
}
#endif /* PM */