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authorRafael J. Wysocki <rjw@sisk.pl>2009-09-09 23:49:59 +0200
committerJesse Barnes <jbarnes@virtuousgeek.org>2009-09-14 13:41:46 -0700
commit4b77b0a2ba27d64f58f16d8d4d48d8319dda36ff (patch)
tree957f38dc1065e2880197e7ca5ffe1592515010b3 /drivers/pci/pci-driver.c
parent999cce4a52d5abdda5d2cec6bac241899bc19e4c (diff)
downloadlinux-4b77b0a2ba27d64f58f16d8d4d48d8319dda36ff.tar.bz2
PCI: Clear saved_state after the state has been restored
Some PCI devices fail if their standard configuration registers are restored twice in a row. Prevent this from happening by making pci_restore_state() clear the saved_state flag of the device right after the device's standard configuration registers have been populated with the previously saved values. Simplify PCI PM callbacks by removing the direct clearing of state_saved from them, as it shouldn't be necessary any more (except in pci_pm_thaw(), where it has to be cleared, so that the values saved during the "freeze" phase of hibernation are not used later by mistake). Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'drivers/pci/pci-driver.c')
-rw-r--r--drivers/pci/pci-driver.c11
1 files changed, 2 insertions, 9 deletions
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index dbfc93cb5d01..ffc15e97d11c 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -445,8 +445,6 @@ static int pci_legacy_suspend(struct device *dev, pm_message_t state)
struct pci_dev * pci_dev = to_pci_dev(dev);
struct pci_driver * drv = pci_dev->driver;
- pci_dev->state_saved = false;
-
if (drv && drv->suspend) {
pci_power_t prev = pci_dev->current_state;
int error;
@@ -542,7 +540,6 @@ static int pci_restore_standard_config(struct pci_dev *pci_dev)
static void pci_pm_default_resume_noirq(struct pci_dev *pci_dev)
{
pci_restore_standard_config(pci_dev);
- pci_dev->state_saved = false;
pci_fixup_device(pci_fixup_resume_early, pci_dev);
}
@@ -608,8 +605,6 @@ static int pci_pm_suspend(struct device *dev)
if (pci_has_legacy_pm_support(pci_dev))
return pci_legacy_suspend(dev, PMSG_SUSPEND);
- pci_dev->state_saved = false;
-
if (!pm) {
pci_pm_default_suspend(pci_dev);
goto Fixup;
@@ -744,8 +739,6 @@ static int pci_pm_freeze(struct device *dev)
if (pci_has_legacy_pm_support(pci_dev))
return pci_legacy_suspend(dev, PMSG_FREEZE);
- pci_dev->state_saved = false;
-
if (!pm) {
pci_pm_default_suspend(pci_dev);
return 0;
@@ -821,6 +814,8 @@ static int pci_pm_thaw(struct device *dev)
pci_pm_reenable_device(pci_dev);
}
+ pci_dev->state_saved = false;
+
return error;
}
@@ -832,8 +827,6 @@ static int pci_pm_poweroff(struct device *dev)
if (pci_has_legacy_pm_support(pci_dev))
return pci_legacy_suspend(dev, PMSG_HIBERNATE);
- pci_dev->state_saved = false;
-
if (!pm) {
pci_pm_default_suspend(pci_dev);
goto Fixup;