commit e086ba2fccda ("e1000e: disable s0ix entry and exit flows for ME systems") disabled s0ix flows for systems that have various incarnations of the i219-LM ethernet controller. This was done because of some regressions caused by an earlier commit 632fbd5eb5b0e ("e1000e: fix S0ix flows for cable connected case") with i219-LM controller.
Performing suspend to idle with these ethernet controllers requires a properly configured system. To make enabling such systems easier, this patch series offers configuration options to enable/disable the flows. The flows have also been confirmed to be configured correctly on Dell's Latitude and Precision CML systems containing the i219-LM controller, when the kernel also contains the fix for s0i3.2 entry here: https://lists.osuosl.org/pipermail/intel-wired-lan/Week-of-Mon-20200914/021361.html Patches 2 and 3 will turn the behavior on by default for Dell's CML systems. These patches should only be carried if that patch linked above is also applied. Mario Limonciello (3): e1000e: allow turning s0ix flows on for systems with ME e1000e: Add Dell's Comet Lake systems into s0ix heuristics e1000e: Add more Dell CML systems into s0ix heuristics .../device_drivers/ethernet/intel/e1000e.rst | 23 ++ drivers/net/ethernet/intel/Kconfig | 1 + drivers/net/ethernet/intel/e1000e/e1000.h | 7 + drivers/net/ethernet/intel/e1000e/netdev.c | 64 +++--- drivers/net/ethernet/intel/e1000e/param.c | 209 ++++++++++++++++++ 5 files changed, 266 insertions(+), 38 deletions(-) -- 2.25.1