APPLIED: [PATCH v2 0/2][SRU][Jammy] e1000e report hardware hang

[Stefan Bader]

On 03.08.22 08:11, AceLan Kao wrote:
> From: "Chia-Lin Kao (AceLan)" <acelan.kao at canonical.com>
> 
> BugLink: https://bugs.launchpad.net/bugs/1973104
> 
> [Impact]
> e1000e hardware unit hang after s2idle
> May 06 15:34:49 ubuntu kernel: e1000e 0000:00:1f.6 enp0s31f6: Detected Hardware Unit Hang:
>                                   TDH <1>
>                                   TDT <5>
>                                   next_to_use <5>
>                                   next_to_clean <1>
>                                 buffer_info[next_to_clean]:
>                                   time_stamp <1000587f0>
>                                   next_to_watch <1>
>                                   jiffies <1000589c0>
>                                   next_to_watch.status <0>
>                                 MAC Status <40080283>
>                                 PHY Status <796d>
>                                 PHY 1000BASE-T Status <3800>
>                                 PHY Extended Status <3000>
>                                 PCI Status <10>
> 
> [Fix]
> Below commits fix this issue which have been included in v5.19-rc8
> https://patchwork.ozlabs.org/project/intel-wired-lan/patch/20220508070905.1878172-1-sasha.neftin@intel.com/
> 
> 6cfa45361d3e Revert "e1000e: Fix possible HW unit hang after an s0ix exit"
> b49feacbeffc e1000e: Enable GPT clock before sending message to CSME
> 
> [Test]
> Verified on the target machine, and confirmed the issue is gone.
> 
> [Where problems could occur]
> The impact is low, it keeps the GPT clock enabled for CSME when
> e1000e_pm_resume() is called. With the new fix, the old workaround could
> be removed. I can't see this may introduce any regression.
> 
> Sasha Neftin (2):
>    e1000e: Enable GPT clock before sending message to CSME
>    Revert "e1000e: Fix possible HW unit hang after an s0ix exit"
> 
>   drivers/net/ethernet/intel/e1000e/hw.h      |  1 -
>   drivers/net/ethernet/intel/e1000e/ich8lan.c |  4 ---
>   drivers/net/ethernet/intel/e1000e/ich8lan.h |  1 -
>   drivers/net/ethernet/intel/e1000e/netdev.c  | 30 +++------------------
>   4 files changed, 4 insertions(+), 32 deletions(-)
> 

Applied to jammy:linux/master-next. Thanks.

-Stefan

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