Re: ahcisata0: reset failed

> From: Thomas Klausner <[email protected]>
> Date: Mon, 6 Jul 2026 20:36:40 +0200
>=20
> I've just updated to today's -current (20260706), and most of my disks
> are not found.
>=20
> In dmesg, I see the following changes compared to about three weeks ago:
>=20
> +MPACPI PCI bus number 11 configuration failed: 6
>=20
> -ahcisata0: AHCI revision 1.31, 6 ports, 32 slots, CAP 0xef36ff25<SXS,PSC=
,SSC,PMD,SPM,SAM,ISS=3D0x3=3DGen3,SCLO,SAL,SALP,SSS,SSNTF,SNCQ,S64A>
> -ahcisata0: interrupting at msi4 vec 0
> -atabus0 at ahcisata0 channel 0
> -atabus1 at ahcisata0 channel 1
> -atabus2 at ahcisata0 channel 2
> -atabus3 at ahcisata0 channel 3
> +autoconfiguration error: ahcisata0: reset failed

Thanks, likely caused by enabling PCI_RESOURCE, in which case the
workaround is to add `no options PCI_RESOURCE' to your kernel config.

But we need to get PCI_RESOURCE working out of the box.  Can you file
a PR with:

1. dmesg with `boot -vx' with and without PCI_RESOURCE, and

2. `pcictl pci0 dump -b <bus> -f <func> -d <dev>' with and without
   PCI_RESOURCE, where <bus>/<func>/<dev> are according to wherever
   ahcisata0 attaches at PCI?