From: "Mario Limonciello (AMD)" <superm1@kernel.org>
To: Bjorn Helgaas <bhelgaas@google.com>,
linux-pci@vger.kernel.org (open list:PCI SUBSYSTEM)
Cc: linux-pci@vger.kernel.org (open list:PCI SUBSYSTEM),
linux-kernel@vger.kernel.org (open list),
"Rafael J . Wysocki" <rafael@kernel.org>,
Lukas Wunner <lukas@wunner.de>,
linux-pm@vger.kernel.org,
"Mario Limonciello (AMD)" <superm1@kernel.org>,
Eric Naim <dnaim@cachyos.org>
Subject: [PATCH v2 4/6] PCI/PM: Run bridge power up actions as part of restore phase
Date: Mon, 27 Apr 2026 15:50:22 -0500 [thread overview]
Message-ID: <20260427205024.254677-5-superm1@kernel.org> (raw)
In-Reply-To: <20260427205024.254677-1-superm1@kernel.org>
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>
---
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 bfb521eb0eed7..793af4af2971b 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -1273,10 +1273,15 @@ 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;
--
2.53.0
next prev parent reply other threads:[~2026-04-27 20:50 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-27 20:50 [PATCH v2 0/6] Improvements to PCI hibernate path Mario Limonciello (AMD)
2026-04-27 20:50 ` [PATCH v2 1/6] PCI: Stop setting cached power state to "unknown" on unbind Mario Limonciello (AMD)
2026-04-27 20:50 ` [PATCH v2 2/6] PCI/PM: Disable device wakeups when halting or powering off system Mario Limonciello (AMD)
2026-04-27 20:50 ` [PATCH v2 3/6] PCI/PM: Split out code from pci_pm_suspend_noirq() into helper Mario Limonciello (AMD)
2026-04-27 20:50 ` Mario Limonciello (AMD) [this message]
2026-04-27 20:50 ` [PATCH v2 5/6] PCI/PM: Use pci_power_manageable() in pci_pm_poweroff_noirq() Mario Limonciello (AMD)
2026-04-27 20:50 ` [PATCH v2 6/6] PCI: Put PCIe bridges with downstream devices into D3 at hibernate Mario Limonciello (AMD)
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