NACK/Cmt: [SRU][N:linux][PATCH 0/1] power: intel_pstate: Fix unchecked MSR

[Thibault Ferrante]

I though it wasn't applied, the corresponding mail wasn't sorted correctly and I missed it.
Sorry for the confusion.
Reaching out.

On 13/01/2026 07:49, Stefan Bader wrote:
> On 12/01/2026 16:56, Thibault Ferrante wrote:
>> Introduce a regression which is fixed 4b747cc62 "cpufreq: intel_pstate: Check IDA only before MSR_IA32_PERF_CTL writes"
>> Fixing the back-port and including the new fix in the submission.
> 
> No, this does not work like that. You missed your chance to do that. This is applied already and the resulting kernel is prepared. You have to file a bug report ASAP to submit the fix and submit the missing patch urgently and request a re-spin from the cycle lead of 2025.01.12!!!
> 
> -Stefan
>>
>>
>> On 19/12/2025 16:10, Thibault Ferrante wrote:
>>> BugLink: https://bugs.launchpad.net/bugs/2130244
>>>
>>> [ Impact ]
>>>
>>>   * Access to trying to access /sys/devices/system/cpu/intel_pstate/ no_turbo on Skylake-X systems trigger an unchecked MSR access error: WRMSR to 0x199 (attempted to write 0x0000000100001300).
>>>
>>> [ Fix ]
>>>
>>>   * Clean cherry-pick from upstream:
>>>    ac4e04d9e378 cpufreq: intel_pstate: Unchecked MSR aceess in legacy mode
>>>
>>> [ Test Plan ]
>>>
>>>   * Compiled.
>>>
>>> [ Where problems could occur ]
>>>
>>>   * Regression in turbo management in intel hardware.
>>>
>>> [ Other Info ]
>>>
>>>   * This is a public version of: https://bugs.launchpad.net/bugs/2115105
>>>   * Already integrated in Plucky with https://bugs.launchpad.net/ bugs/2113881
>>>
>>> Srinivas Pandruvada (1):
>>>    cpufreq: intel_pstate: Unchecked MSR aceess in legacy mode
>>>
>>>   drivers/cpufreq/intel_pstate.c | 3 +++
>>>   1 file changed, 3 insertions(+)
>>>
>>
>