[PATCH 0/2][SRU][B][C] Ethernet[10ec:8136] doesn't work after S3 with kernel 4.15.0.43.64

[AceLan Kao]

BugLink: https://bugs.launchpad.net/bugs/1809847

[Impact]
The Realtek Ethernet[10ec:8136] works after S3 with kernel 4.15.0-33.36,
and fails with kernel 4.15.0.43.64. There is no interrupt while
plug/unplug Ethernet cable after S3, so it looks like an regression after
4.15.0-33.36.

[Fix]
Check changelog and found there are 2 commits introduced from
4.15.0-35.38 might be suspicious
  * r8169 no internet after suspending (LP: #1779817)
    - r8169: don't use MSI-X on RTL8168g
    - r8169: don't use MSI-X on RTL8106e
And check the upstream log and found the 2 MSI-X commits had been all
reverted, since below commit claims it fixes the MSI-X interrupt issue
which is already in Bionic kernel.
   083874549fdf PCI: Reprogram bridge prefetch registers on resume
So, I reverted the 2 MSI-X commits and found the Ethernet works again
after S3.

[Regression Potential]
Low, the 2 disable MSI-X commits are workarounds, and now we have a proper
way to fix the issue, so it should be fine to revert them.

AceLan Kao (1):
  UBUNTU: SAUCE: Revert "r8169: don't use MSI-X on RTL8106e"

Heiner Kallweit (1):
  r8169: re-enable MSI-X on RTL8168g

 drivers/net/ethernet/realtek/r8169.c | 12 ++----------
 1 file changed, 2 insertions(+), 10 deletions(-)

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2.17.1