On Mon, Feb 11, 2019 at 04:55:33PM -0600, Bjorn Helgaas wrote: > These are to fix a couple LTR-related issues found while investigating > https://bugzilla.kernel.org/show_bug.cgi?id=201469 > > I don't claim that these fix the whole problem of that bugzilla, but I > think it's pretty clear that these are problems we need to fix, so I want > to give these a little more exposure. > > Feedback welcome! > > --- > > Bjorn Helgaas (2): > PCI/ASPM: Use LTR if already enabled by platform > PCI/ASPM: Save LTR Capability for suspend/resume > > > drivers/pci/pci.c | 53 > +++++++++++++++++++++++++++++++++++++++++++++++++-- > drivers/pci/probe.c | 36 ++++++++++++++++++++++------------- > 2 files changed, 74 insertions(+), 15 deletions(-)
I applied these to pci/aspm for v5.1. I think Vidya is absolutely right that we also need to save/restore the ASPM L1 Substates capability. But I haven't had a chance to write that up yet, and I think these two patches by themselves are an improvement even without ASPM L1 SS. Bjorn
