[PATCH 0/1][SRU][OEM-5.10] UBUNTU: SAUCE: Fix Ethernet not working by hotplug - RTL8106E

[Koba Ko]

BugLink: https://bugs.launchpad.net/bugs/1930645

[Impact]
After hot-plug the Ethernet cable, the status of Ethernet is always down.

[Fix]
Because ASPM is enabled on RTL8106E, the link change interrupt can't be fired immediately.
Need to wait a long time to get the link change interrupt.
Introduce a polling method to watch the link status and disable the link change interrupt for RTL8106E.

Due to schedule, SRU this patch first and will upstream later.

[Test]
Verified on machines with Realtek Ethernet device, the Ethernet works well after hotplug 30 times.

[Regression Potential]
High, may have some cases missed in link change polling method and will fix them in the future.

Koba Ko (1):
  r8169: introduce polling method for link change

 drivers/net/ethernet/realtek/r8169.h      |   2 +
 drivers/net/ethernet/realtek/r8169_main.c | 116 +++++++++++++++++++---
 2 files changed, 102 insertions(+), 16 deletions(-)

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2.25.1