Re: [PATCH 0/3] ata: fix deferred QC handling for port multipliers

[Niklas Cassel <cassel@kernel.org>]

Hello Tommy,

On Sat, May 02, 2026 at 05:59:12PM -0700, Tommy Kelly wrote:
> 
> Yes, this patch series fixed the regression for me with a CBS Port Multiplier.
> 
> Here are the commits I tested with:
> 
> > (HEAD -> fedora-7.0-libata) ata: libata-scsi: do not needlessly defer commands when using PMP with FBS
> > ata: libata-scsi: do not use the deferred QC feature on PMPs with CBS
> > ata: libata-pmp: fix ata_pmp_qc_defer_cmd_switch()
> > ata: ahci: fail probe if BAR too small for claimed ports
> > ata: libahci: use ahci_nr_ports() helper
> > ata: pata_parport: switch to dynamic root device
> > Merge remote-tracking branch 'libata/for-7.1' into fedora-7.0-libata
> > (tag: kernel-7.0.3-0, kernel-ark/fedora-7.0, fedora-7.0) [redhat] kernel-7.0.3-0
> > Merge Linux v7.0.3
> > (tag: v7.0.3, kernel-ark/linux-7.0.y, linux-7.0.y) Linux 7.0.3
> 
> And here's some logs showing ata_id (non-NCQ) resolving immediately.
> After, I'm able to boot and mount and use the filesystem no problem.
> No errors and no timeouts.
> 
> > Mar 12 17:00:10 localhost kernel: ahci-dwc fc800000.sata: port 0 is not capable of FBS
> > May 02 17:12:39 (udev-worker)[874]: sdd: Starting 'ata_id --export /dev/sdd'
> > May 02 17:12:39 (udev-worker)[874]: sdd: 'ata_id --export /dev/sdd'(out) 'ID_ATA=1'
> > May 02 17:12:39 (udev-worker)[874]: sdd: Process 'ata_id --export /dev/sdd' succeeded.

This all looks normal to me.

Thank you very much for testing!


Kind regards,
Niklas