Re: [PATCH] Revert "interconnect: qcom: x1e80100: enable QoS configuration"

[Marc Zyngier <maz@kernel.org>]

On Tue, 15 Sep 2026 13:37:03 +0100,
Marc Zyngier <maz@kernel.org> wrote:
> 
> This reverts commit 5a8b2cc36e796d595c9d97eab23c2be22805cc1c.
> 
> Since the introduction of this QoS change, X1 machines based on the
> Purwa SoC (such as the Lenovo Mini X) take a hard reset at boot time.
> 
> Other machines based on Hamoa (such as the X1E001DE Snapdragon Devkit)
> end-up with a similar hard reset while under load, most likely due to
> the PCIe ports being starved of traffic.
> 
> Revert the whole thing until someone figures out what magic parameters
> allow QoS to work in a sensible manner, as a usable machine is somehow
> preferable to one that crashes efficiently.
> 
> Link: https://lore.kernel.org/all/apgeBNSiP01YfNcs@google.com
> Link: https://lore.kernel.org/all/86ld9d4h4n.wl-maz@kernel.org
> Signed-off-by: Marc Zyngier <maz@kernel.org>
> Cc: Georgi Djakov <djakov@kernel.org>
> Cc: Raviteja Laggyshetty <raviteja.laggyshetty@oss.qualcomm.com>
> Cc: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
> Cc: Abel Vesa <abelvesa@kernel.org>
> Cc: Bjorn Andersson <andersson@kernel.org>
> Cc: Mostafa Saleh <smostafa@google.com>
> Cc: Thorsten Leemhuis <regressions@leemhuis.info>
> ---
>  drivers/interconnect/qcom/x1e80100.c | 485 ---------------------------
>  1 file changed, 485 deletions(-)

Any update on applying this? These machines have been broken for the
past 4 release candidates, and it'd be great to get them back to a
working state.

Thanks,

	M.

-- 
Without deviation from the norm, progress is not possible.