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Wysocki" To: Linux PM Cc: LKML , Linux ACPI , Linux PCI , Ulf Hansson , Mika Westerberg Subject: [PATCH v2 9/9] PCI: PM: Set power.strict_midlayer in pci_pm_init() Date: Thu, 26 Jun 2025 20:15:05 +0200 Message-ID: <1952931.CQOukoFCf9@rjwysocki.net> In-Reply-To: <5015172.GXAFRqVoOG@rjwysocki.net> References: <5015172.GXAFRqVoOG@rjwysocki.net> Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="UTF-8" X-CLIENT-IP: 5.63.189.50 X-CLIENT-HOSTNAME: 5.63.189.50 X-VADE-SPAMSTATE: clean X-VADE-SPAMCAUSE: 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 X-DCC--Metrics: v370.home.net.pl 1024; Body=6 Fuz1=6 Fuz2=6 From: Rafael J. Wysocki The PCI bus type does not expect its runtime PM callbacks, pci_pm_runtime_suspend() and pci_pm_runtime_resume(), to be invoked at any point 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 --- v1 -> v2: * Set and clear the new flag in "prepare" and "complete" to allow pm_runtime_force_suspend() invoked from driver remove callbacks to work. * Update subject and changelog. --- drivers/pci/pci-driver.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/drivers/pci/pci-driver.c +++ b/drivers/pci/pci-driver.c @@ -708,6 +708,8 @@ 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 @@ if (pci_dev->current_state < pre_sleep_state) pm_request_resume(dev); } + + dev_pm_set_strict_midlayer(dev, false); } #else /* !CONFIG_PM_SLEEP */