PCI/ASPM: Save L1 PM Substates Capability for suspend/resume

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Previously the L1 PM Substates Control Registers (CTL1 and CTL2) weren't
saved and restored during suspend/resume leading to the L1 PM Substates
configuration being lost post-resume.

Save the L1 PM Substates Control Registers so that the configuration is
retained post-resume.

[bhelgaas: drop pci_is_pcie() testing; we can rely on pci_configure_ltr()
having already done that]
Link: https://lore.kernel.org/r/20220913131822.16557-3-vidyas@nvidia.com
Signed-off-by: Vidya Sagar <vidyas@nvidia.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

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Vidya Sagar 2022-09-13 18:48:22 +05:30 • committed by Bjorn Helgaas

parent 5e85eba6f5

commit 4ff116d0d5

3 changed files with 48 additions and 0 deletions

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7

drivers/pci/pci.c

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4

drivers/pci/pci.h

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37

drivers/pci/pcie/aspm.c

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