[PATCH v6 07/11] PCI: PM: Run bridge power up actions as part of restore phase

Mario Limonciello (AMD)
2025-08-18T02:01:27Z

Suspend resume actions will check the state of the device and whether
bus PM should be skipped. These same actions make sense during hibernation
image restore. Apply them there as well.

Tested-by: Eric Naim <dnaim@cachyos.org>
Signed-off-by: Mario Limonciello (AMD) <superm1@kernel.org>
---
v5:
* Split out patch
---
drivers/pci/pci-driver.c | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index 571a3809f163a..fb6f1f60b2f1f 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -1246,10 +1246,15 @@ static int pci_pm_restore_noirq(struct device *dev)
{
struct pci_dev *pci_dev = to_pci_dev(dev);
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
+ pci_power_t prev_state = pci_dev->current_state;
+ bool skip_bus_pm = pci_dev->skip_bus_pm;

pci_pm_default_resume_early(pci_dev);
pci_fixup_device(pci_fixup_resume_early, pci_dev);

+ if (!skip_bus_pm && prev_state == PCI_D3cold)
+ pci_pm_bridge_power_up_actions(pci_dev);
+
if (pci_has_legacy_pm_support(pci_dev))
return 0;

--
2.43.0