PCI/ASPM: Move pci_save_ltr_state() to aspm.c

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Even when CONFIG_PCIEASPM is not set, we save and restore the LTR
Capability so that if ASPM L1.2 and LTR were configured by the platform,
ASPM L1.2 will still work after suspend/resume, when that platform
configuration may be lost. See dbbfadf231 ("PCI/ASPM: Save LTR Capability
for suspend/resume").

Since ASPM L1.2 depends on the LTR Capability, move the save/restore code
to the part of aspm.c that is always compiled regardless of
CONFIG_PCIEASPM.  No functional change intended.

Suggested-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/20240128233212.1139663-5-david.e.box@linux.intel.com
[bhelgaas: commit log, reorder to make this a pure move]
Link: https://lore.kernel.org/r/20240223205851.114931-4-helgaas@kernel.org
Signed-off-by: David E. Box <david.e.box@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

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This commit is contained in:

David E. Box 2024-02-23 14:58:49 -06:00 • committed by Bjorn Helgaas

parent f3994bba82

commit 1e11b5494c

3 changed files with 45 additions and 40 deletions

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40

drivers/pci/pci.c

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5

drivers/pci/pci.h

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40

drivers/pci/pcie/aspm.c

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