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PCI PM: Split PCI Express port suspend-resume 

Suspend-resume of PCI Express ports has recently been moved into
_suspend_late() and _resume_early() callbacks, but some functions
executed from there should not be called with interrupts disabled,
eg. pci_enable_device().  For this reason, split the suspend-resume
of PCI Express ports into parts to be executed with interrupts
disabled and with interrupts enabled.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Rafael J. Wysocki 2008-12-27 16:28:58 +01:00 committed by Jesse Barnes
parent f06fc0b6f8
commit a79d682f78
1 changed files with 17 additions and 6 deletions
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23
drivers/pci/pcie/portdrv_pci.c
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@ -41,7 +41,6 @@ static int pcie_portdrv_restore_config(struct pci_dev *dev)
{
int retval;
pci_restore_state(dev);
retval = pci_enable_device(dev);
if (retval)
return retval;
@ -50,23 +49,32 @@ static int pcie_portdrv_restore_config(struct pci_dev *dev)
}
#ifdef CONFIG_PM
static int pcie_portdrv_suspend(struct pci_dev *dev, pm_message_t state)
{
return pcie_port_device_suspend(dev, state);
}
static int pcie_portdrv_suspend_late(struct pci_dev *dev, pm_message_t state)
{
int ret = pcie_port_device_suspend(dev, state);
if (!ret)
ret = pcie_portdrv_save_config(dev);
return ret;
return pci_save_state(dev);
}
static int pcie_portdrv_resume_early(struct pci_dev *dev)
{
return pci_restore_state(dev);
}
static int pcie_portdrv_resume(struct pci_dev *dev)
{
pcie_portdrv_restore_config(dev);
return pcie_port_device_resume(dev);
}
#else
#define pcie_portdrv_suspend NULL
#define pcie_portdrv_suspend_late NULL
#define pcie_portdrv_resume_early NULL
#define pcie_portdrv_resume NULL
#endif
/*
@ -221,6 +229,7 @@ static pci_ers_result_t pcie_portdrv_slot_reset(struct pci_dev *dev)
/* If fatal, restore cfg space for possible link reset at upstream */
if (dev->error_state == pci_channel_io_frozen) {
pci_restore_state(dev);
pcie_portdrv_restore_config(dev);
pci_enable_pcie_error_reporting(dev);
}
@ -282,8 +291,10 @@ static struct pci_driver pcie_portdriver = {
.probe = pcie_portdrv_probe,
.remove = pcie_portdrv_remove,
.suspend = pcie_portdrv_suspend,
.suspend_late = pcie_portdrv_suspend_late,
.resume_early = pcie_portdrv_resume_early,
.resume = pcie_portdrv_resume,
.err_handler = &pcie_portdrv_err_handler,
};