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PCI/PM: Set power.strict_midlayer in pci_pm_init()

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The PCI bus type does not expect its runtime PM suspend callback
function, pci_pm_runtime_suspend(), to be invoked at all during system-
wide suspend and resume, and it does not expect its runtime resume
callback function, pci_pm_runtime_resume(), to be invoked at any point
when runtime PM is disabled for the given device during system-wide
suspend and resume, so make it express that expectation by setting
power.strict_midlayer for all PCI devices in pci_pm_prepare() and
clear it in pci_pm_complete().

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://patch.msgid.link/1925097.atdPhlSkOF@rjwysocki.net
This commit is contained in:
Rafael J. Wysocki 2025-06-27 21:29:16 +02:00
parent 325e3778ea
commit f19dc0489e
1 changed files with 4 additions and 0 deletions
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4
drivers/pci/pci-driver.c
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@ -708,6 +708,8 @@ static int pci_pm_prepare(struct device *dev)
struct pci_dev *pci_dev = to_pci_dev(dev);
const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
dev_pm_set_strict_midlayer(dev, true);
if (pm && pm->prepare) {
int error = pm->prepare(dev);
if (error < 0)
@ -749,6 +751,8 @@ static void pci_pm_complete(struct device *dev)
if (pci_dev->current_state < pre_sleep_state)
pm_request_resume(dev);
}
dev_pm_set_strict_midlayer(dev, false);
}
#else /* !CONFIG_PM_SLEEP */