[PATCH] wifi: mt76: mt792x: fix NULL pointer dereference in mt792x_init_acpi_sar_power

[Marco Scardovi]

In data sabato 5 settembre 2026 01:48:38 Ora legale dell’Europa centrale, 
Devin Wittmayer ha scritto:
> On Fri, 4 Sep 2026 18:18:26 +0200, Marco Scardovi wrote:
> > Fixes: f965333e491e ("mt76: mt7921: introduce ACPI SAR support")
> 
> There is a patch for this from 25 August:
> 
>  
> https://lore.kernel.org/linux-wireless/20260825181712.28548-1-lucid_duck@ju
> stthetip.ca/
> 
> Klara Modin reported it, David Gow confirmed the fix on a Framework 13.
> 
Hi Devin,

sorry, I didn't notice that a thread was already opened so I supposed no
one reported it at all.
> One note on the Fixes tag. The crash needs a regulatory update to run
> before registration, and that only started with these:
> 
>   9b80bd9cab40  2026-06-09  mt7921 regulatory wiphy self manager
>   e9f3f1cc133f  2026-06-09  mt7925 regulatory wiphy self manager
> 
> Before those it just set flags, so the 2022 commit would reach stable
> kernels that never had the bug.
> 
You are right on that, I'll pay more attention next time
> Your trace enters through the regulatory notifier, mine through
> firmware init. I could not find mt7921_regd_notifier_work in mt76
> here, so if you have a second trigger I would like to see it.
> 
The whole patch is as you see it but: I didn't add anything more.
Tbh I was working on a whole different sub but the OS refused to start
because of this one so I came up with the absolute minimum patch to
make it working
> Thanks for taking this one on.
> 
> Devin
At this point you can count this patch as void. Thank you for your time,
Marco