Comment 22 for bug 1865570

@mapengyu, I've rebuilt e1000e.ko with your patch applied to 5.6.0-rc5 tree, and suspend works normally for me:

Linux journex 5.6.0-rc5+ #2 SMP Sun Mar 15 00:09:19 CET 2020 x86_64 x86_64 x86_64 GNU/Linux

First suspend:
[ 66.578525] PM: suspend entry (s2idle)
[ 66.582870] Filesystems sync: 0.004 seconds
[ 66.583640] Freezing user space processes ... (elapsed 0.002 seconds) done.
[ 66.585841] OOM killer disabled.
[ 66.585842] Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done.
[ 66.587085] printk: Suspending console(s) (use no_console_suspend to debug)
[ 66.587375] wlp0s20f3: deauthenticating from 18:d6:c7:61:95:c2 by local choice (Reason: 3=DEAUTH_LEAVING)
[ 66.691969] e1000e: EEE TX LPI TIMER: 00000011
[ 69.395364] ACPI: EC: interrupt blocked
[ 79.252679] ACPI: EC: interrupt unblocked
[ 82.053040] iwlwifi 0000:00:14.3: Applying debug destination EXTERNAL_DRAM
[ 82.169363] iwlwifi 0000:00:14.3: Applying debug destination EXTERNAL_DRAM
[ 82.234288] iwlwifi 0000:00:14.3: FW already configured (0) - re-configuring
[ 85.251055] OOM killer enabled.
[ 85.251056] Restarting tasks ... done.
[ 85.260141] mei_hdcp 0000:00:16.0-b638ab7e-94e2-4ea2-a552-d1c54b627f04: bound 0000:00:02.0 (ops i915_hdcp_component_ops [i915])
[ 85.293929] PM: suspend exit
[ 85.391753] e1000e 0000:00:1f.6 enp0s31f6: NIC Link is Down
[ 85.627128] iwlwifi 0000:00:14.3: Applying debug destination EXTERNAL_DRAM
...

Second suspend:
[ 140.523471] PM: suspend entry (s2idle)
[ 140.554018] Filesystems sync: 0.030 seconds
[ 140.554655] Freezing user space processes ... (elapsed 0.002 seconds) done.
[ 140.556773] OOM killer disabled.
[ 140.556773] Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done.
[ 140.558014] printk: Suspending console(s) (use no_console_suspend to debug)
[ 140.558275] wlp0s20f3: deauthenticating from 18:d6:c7:61:95:c2 by local choice (Reason: 3=DEAUTH_LEAVING)
[ 140.659976] e1000e: EEE TX LPI TIMER: 00000011
[ 143.380606] ACPI: EC: interrupt blocked
[ 158.716081] ACPI: EC: interrupt unblocked
[ 161.516454] iwlwifi 0000:00:14.3: Applying debug destination EXTERNAL_DRAM
[ 161.866014] iwlwifi 0000:00:14.3: Applying debug destination EXTERNAL_DRAM
[ 161.933414] iwlwifi 0000:00:14.3: FW already configured (0) - re-configuring
[ 164.586442] OOM killer enabled.
[ 164.586443] Restarting tasks ...
[ 164.592488] mei_hdcp 0000:00:16.0-b638ab7e-94e2-4ea2-a552-d1c54b627f04: bound 0000:00:02.0 (ops i915_hdcp_component_ops [i915])
[ 164.592743] done.
[ 164.637623] PM: suspend exit
[ 164.735062] e1000e 0000:00:1f.6 enp0s31f6: NIC Link is Down
[ 164.999601] iwlwifi 0000:00:14.3: Applying debug destination EXTERNAL_DRAM
...