diff options
| author | Rafael J. Wysocki <rjw@sisk.pl> | 2008-12-27 16:30:52 +0100 |
|---|---|---|
| committer | Jesse Barnes <jbarnes@virtuousgeek.org> | 2009-01-07 11:13:08 -0800 |
| commit | f06fc0b6f8a6846e0ad48aee7b0f282b4fb5dcdc (patch) | |
| tree | a723b05eedd9457ad50a0fb4220c73beac11f46a /drivers/pci/pci.c | |
| parent | eb9c39d031bbcfd4005bd7e0337c3fd3909c1bf7 (diff) | |
| download | lwn-f06fc0b6f8a6846e0ad48aee7b0f282b4fb5dcdc.tar.gz lwn-f06fc0b6f8a6846e0ad48aee7b0f282b4fb5dcdc.zip | |
PCI PM: Fix pci_update_current_state
Currently, PCI devices without the PM capability that are power
manageable by the platform (eg. ACPI) are not handled correctly
by pci_set_power_state(), because their current_state field is not
updated to reflect the new power state of the device. Fix this by
making pci_update_current_state() accept additional argument
representing the power state of the device as set by the platform.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'drivers/pci/pci.c')
| -rw-r--r-- | drivers/pci/pci.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 1b807330e500..9d2aa6366fd0 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -525,14 +525,17 @@ pci_raw_set_power_state(struct pci_dev *dev, pci_power_t state) * pci_update_current_state - Read PCI power state of given device from its * PCI PM registers and cache it * @dev: PCI device to handle. + * @state: State to cache in case the device doesn't have the PM capability */ -static void pci_update_current_state(struct pci_dev *dev) +static void pci_update_current_state(struct pci_dev *dev, pci_power_t state) { if (dev->pm_cap) { u16 pmcsr; pci_read_config_word(dev, dev->pm_cap + PCI_PM_CTRL, &pmcsr); dev->current_state = (pmcsr & PCI_PM_CTRL_STATE_MASK); + } else { + dev->current_state = state; } } @@ -575,7 +578,7 @@ int pci_set_power_state(struct pci_dev *dev, pci_power_t state) */ int ret = platform_pci_set_power_state(dev, PCI_D0); if (!ret) - pci_update_current_state(dev); + pci_update_current_state(dev, PCI_D0); } /* This device is quirked not to be put into D3, so don't put it in D3 */ @@ -588,7 +591,7 @@ int pci_set_power_state(struct pci_dev *dev, pci_power_t state) /* Allow the platform to finalize the transition */ int ret = platform_pci_set_power_state(dev, state); if (!ret) { - pci_update_current_state(dev); + pci_update_current_state(dev, state); error = 0; } } |