Re: [PATCH v4] PCI: Disable broken FLR on MediaTek MT7925

[Jose Ignacio Tornos Martinez]

Hello Bjorn,


> Alex, are you OK with this?  The v2 conversation talks about SBR also
> being broken, but maybe that turned out to be a red herring?
> 
>  https://lore.kernel.org/linux-pci/20260508145153.717641-1-jtornosm@xxxxxxxxxx/t/#u
Alex can answer better, but to clarify: SBR works correctly for MT7925e.
The confusion in v2 was because I initially grouped MT7925e together with
Qualcomm devices (WCN6855, WCN7850, SDX modems) to try to fix their reset
issues. Alex suggested testing SBR for all of them, which revealed they
have different issues:
- MT7925e: FLR advertised but broken, SBR works fine (this patch - quirk_no_flr)
- Qualcomm devices: No FLR capability, SBR is broken (separate series with
  quirk_no_bus_reset + device-specific reset)
So I split them into separate patches since the root causes are different.
This fix for MT7925e (quirk_no_flr) removes the broken FLR and allows the
working SBR to be used.

Thanks

Best regards
Jose Ignacio