linux-kernel - Re: [RESEND v13 17/25] cxl: Introduce cxl_pci_drv

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Message-ID: <aQzWzp4DdSqTj9Hc@gourry-fedora-PF4VCD3F>
Date: Thu, 6 Nov 2025 12:11:42 -0500
From: Gregory Price <gourry@...rry.net>
To: Terry Bowman <terry.bowman@....com>
Cc: dave@...olabs.net, jonathan.cameron@...wei.com, dave.jiang@...el.com,
	alison.schofield@...el.com, dan.j.williams@...el.com,
	bhelgaas@...gle.com, shiju.jose@...wei.com, ming.li@...omail.com,
	Smita.KoralahalliChannabasappa@....com, rrichter@....com,
	dan.carpenter@...aro.org, PradeepVineshReddy.Kodamati@....com,
	lukas@...ner.de, Benjamin.Cheatham@....com,
	sathyanarayanan.kuppuswamy@...ux.intel.com,
	linux-cxl@...r.kernel.org, alucerop@....com, ira.weiny@...el.com,
	linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org
Subject: Re: [RESEND v13 17/25] cxl: Introduce cxl_pci_drv_bound() to check
 for bound driver

On Wed, Nov 05, 2025 at 05:26:01PM -0500, Gregory Price wrote:
> On Wed, Nov 05, 2025 at 02:03:31PM -0500, Gregory Price wrote:
> > On Wed, Nov 05, 2025 at 12:51:04PM -0500, Gregory Price wrote:
> > > 
> > > [    2.697094] cxl_core 0000:0d:00.0: BAR 0 [mem 0xfe800000-0xfe80ffff 64bit]: not claimed; can't enable device
> > > [    2.697098] cxl_core 0000:0d:00.0: probe with driver cxl_core failed with error -22
> > > 
> > > Probe order issue when CXL drivers are built-in maybe?
> > > 
> > 
> 
> moving it back but leaving the function seemed to work for me, i don't
> know what the implication of this is though (i.e. it's unclear to me
> why you moved it from point a to point b in the first place).
> 
> (only tested this on QEMU)

also tested on Zen5 systems and others.  Seems stable to me.

~Gregory