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PCI/PM: Add needs_resume flag to avoid suspend complete optimization
Some drivers - like i915 - may not support the system suspend direct complete optimization due to differences in their runtime and system suspend sequence. Add a flag that when set resumes the device before calling the driver's system suspend handlers which effectively disables the optimization. Needed by a future patch fixing suspend/resume on i915. Suggested by Rafael. Signed-off-by: Imre Deak <imre.deak@intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Cc: stable@vger.kernel.org
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@ -2144,7 +2144,8 @@ bool pci_dev_keep_suspended(struct pci_dev *pci_dev)
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if (!pm_runtime_suspended(dev)
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|| pci_target_state(pci_dev) != pci_dev->current_state
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|| platform_pci_need_resume(pci_dev))
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|| platform_pci_need_resume(pci_dev)
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|| (pci_dev->dev_flags & PCI_DEV_FLAGS_NEEDS_RESUME))
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return false;
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/*
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@ -183,6 +183,11 @@ enum pci_dev_flags {
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PCI_DEV_FLAGS_BRIDGE_XLATE_ROOT = (__force pci_dev_flags_t) (1 << 9),
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/* Do not use FLR even if device advertises PCI_AF_CAP */
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PCI_DEV_FLAGS_NO_FLR_RESET = (__force pci_dev_flags_t) (1 << 10),
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/*
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* Resume before calling the driver's system suspend hooks, disabling
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* the direct_complete optimization.
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*/
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PCI_DEV_FLAGS_NEEDS_RESUME = (__force pci_dev_flags_t) (1 << 11),
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};
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enum pci_irq_reroute_variant {
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