On 2/16/2022 11:30 AM, Kenneth R. Crudup wrote:
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On Wed, 16 Feb 2022, Vidya Sagar wrote:
I see that the ASPM-L1 state of Realtek NIC which was in disabled state before
hibernate got enabled after hibernate.
That's actually my SD-Card reader; there's a good chance the BIOS does "something"
to it at boot time, as it's possible to boot from SD-Card on my laptop.
This patch doesn't do anything to LnkCtl register which has control for ASPM L1
state.
Could you please check why ASPM L1 got enabled post hibernation?
I wouldn't know how to do that; if you're still interested in that let me know
what to do to determine that.
I would like Bjorn to take a call on it.
At this point, there are contradictions in observations.
Just to summarize,
- The root ports in your laptop don't have support for L1SS
- With the same old code base with which the errors were observed plus
my patch on top of it, I see that ASPM-L1 state getting enabled for one
of the endpoints (Realtek SD-Card reader) after system comes out of
hibernation even though ASPM-L1 was disabled before the system enter
into hibernation. No errors are reported now.
- With the linux-next top of the tree plus my patch, no change in the
ASPM states and no errors also reported.
This points to BIOS being buggy (both old and new with new one being
less problematic)
Bjorn, what are your comments on it?
-Kenny
--
Kenneth R. Crudup / Sr. SW Engineer, Scott County Consulting, Orange County CA
