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author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2021-09-29 20:11:18 +0200 |
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committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2021-10-05 15:38:05 +0200 |
commit | 6407e5ecdc66cd9da760e751a7c092c87a683861 (patch) | |
tree | ad2baef3e00f4d0ccf24aa414e6637e929eb2b72 /drivers/pci/pci.c | |
parent | bf39c929f9053cd840155a1c39494c9a9946836b (diff) | |
download | linux-6407e5ecdc66cd9da760e751a7c092c87a683861.tar.bz2 |
PCI: PM: Make pci_choose_state() call pci_target_state()
The pci_choose_state() and pci_target_state() implementations are
somewhat divergent without a good reason, because they are used
for similar purposes.
Change the pci_choose_state() implementation to use pci_target_state()
internally except for transitions to the working state of the system
in which case it is expected to return D0.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Ferry Toth <fntoth@gmail.com>
Diffstat (limited to 'drivers/pci/pci.c')
-rw-r--r-- | drivers/pci/pci.c | 54 |
1 files changed, 16 insertions, 38 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 121d9deea58a..ae8fb60843dd 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -1394,44 +1394,6 @@ int pci_set_power_state(struct pci_dev *dev, pci_power_t state) } EXPORT_SYMBOL(pci_set_power_state); -/** - * pci_choose_state - Choose the power state of a PCI device - * @dev: PCI device to be suspended - * @state: target sleep state for the whole system. This is the value - * that is passed to suspend() function. - * - * Returns PCI power state suitable for given device and given system - * message. - */ -pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state) -{ - pci_power_t ret; - - if (!dev->pm_cap) - return PCI_D0; - - ret = platform_pci_choose_state(dev); - if (ret != PCI_POWER_ERROR) - return ret; - - switch (state.event) { - case PM_EVENT_ON: - return PCI_D0; - case PM_EVENT_FREEZE: - case PM_EVENT_PRETHAW: - /* REVISIT both freeze and pre-thaw "should" use D0 */ - case PM_EVENT_SUSPEND: - case PM_EVENT_HIBERNATE: - return PCI_D3hot; - default: - pci_info(dev, "unrecognized suspend event %d\n", - state.event); - BUG(); - } - return PCI_D0; -} -EXPORT_SYMBOL(pci_choose_state); - #define PCI_EXP_SAVE_REGS 7 static struct pci_cap_saved_state *_pci_find_saved_cap(struct pci_dev *pci_dev, @@ -2843,6 +2805,22 @@ void pci_dev_complete_resume(struct pci_dev *pci_dev) spin_unlock_irq(&dev->power.lock); } +/** + * pci_choose_state - Choose the power state of a PCI device. + * @dev: Target PCI device. + * @state: Target state for the whole system. + * + * Returns PCI power state suitable for @dev and @state. + */ +pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state) +{ + if (state.event == PM_EVENT_ON) + return PCI_D0; + + return pci_target_state(dev, false); +} +EXPORT_SYMBOL(pci_choose_state); + void pci_config_pm_runtime_get(struct pci_dev *pdev) { struct device *dev = &pdev->dev; |