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authorRafael J. Wysocki <rjw@sisk.pl>2008-12-27 16:28:58 +0100
committerJesse Barnes <jbarnes@virtuousgeek.org>2009-01-07 11:13:08 -0800
commita79d682f789730dfabaebbb507c87a90c0671a62 (patch)
treed58b75d734e88086770ceaa726ea614507b53b59 /drivers/pci
parentf06fc0b6f8a6846e0ad48aee7b0f282b4fb5dcdc (diff)
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>
Diffstat (limited to 'drivers/pci')
-rw-r--r--drivers/pci/pcie/portdrv_pci.c23
1 files changed, 17 insertions, 6 deletions
diff --git a/drivers/pci/pcie/portdrv_pci.c b/drivers/pci/pcie/portdrv_pci.c
index 0549fe2bdac9..99a914a027f8 100644
--- a/drivers/pci/pcie/portdrv_pci.c
+++ b/drivers/pci/pcie/portdrv_pci.c
@@ -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_late(struct pci_dev *dev, pm_message_t state)
+static int pcie_portdrv_suspend(struct pci_dev *dev, pm_message_t state)
{
- int ret = pcie_port_device_suspend(dev, state);
+ return pcie_port_device_suspend(dev, state);
- if (!ret)
- ret = pcie_portdrv_save_config(dev);
- return ret;
+}
+
+static int pcie_portdrv_suspend_late(struct pci_dev *dev, pm_message_t state)
+{
+ 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,
};