[PATCH v2] PCI: host-common: Request bus reassignment when not probe-only

[Bjorn Helgaas]

On Mon, May 4, 2026 at 9:49 PM Ratheesh Kannoth <rkannoth at marvell.com> wrote:
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> ZjQcmQRYFpfptBannerEnd
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> On Tue, Apr 14, 2026 at 01:47:30PM +0530, Ratheesh Kannoth wrote:
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> > pci_host_common_init() is used by several generic ECAM host drivers.
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> > After PCI core changes around pci_flags and preserve_config, these hosts
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> > no longer opted into full bus number reassignment the way they did
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> > before.
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> >
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> > When PCI_PROBE_ONLY is not set, add PCI_REASSIGN_ALL_BUS so
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> > pci_scan_bridge_extend() takes the reassignment path: bus numbers can be
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> > assigned from firmware EA data (e.g. pci_ea_fixed_busnrs()). Skip the
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> > flag in probe-only mode so existing assignments are not overridden.
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> >
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> > CC: Bjorn Helgaas <helgaas at kernel.org>
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> > CC: Vidya Sagar <vidyas at nvidia.com>
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> > CC: Manivannan Sadhasivam <mani at kernel.org>
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> > Fixes: 7246a4520b4b ("PCI: Use preserve_config in place of pci_flags")
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> > Link: https://urldefense.proofpoint.com/v2/url?u=https-3A__lore.kernel.org_netdev_adcXzcz2wWJFw4d7-40rkannoth-2DOptiPlex-2D7090_&d=DwIBAg&c=nKjWec2b6R0mOyPaz7xtfQ&r=aekcsyBCH00_LewrEDcQBzsRw8KCpUR0vZb_auTHk4M&m=01Ocq--c6MApFtcfadw2NVeNuCaGZBUwjA3VpG_9uhWaoPultvNor45uL_Eiijk8&s=b9P4fxav0nsyokGf8a2Tm_XrNqunGO4YOS6RJ29_iuk&e=
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> > Signed-off-by: Ratheesh Kannoth <rkannoth at marvell.com>
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> > Was there a bug report associated with this?
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> Please find Bug https://bugzilla.kernel.org/show_bug.cgi?id=221219 reported by me.

I don't have access to that bug report.  If there's nothing secret in
it, can you make it public?

I assume this is the same issue you mentioned at
https://lore.kernel.org/all/abkqm_LCd9zAM8cW@rkannoth-OptiPlex-7090/?

Your email response was HTML, so the mailing lists rejected it, which
is why your response doesn't appear here:
https://lore.kernel.org/all/20260414081730.3864372-1-rkannoth@marvell.com/t/#u

If you can send plain-text emails, that will work better in the Linux
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Bjorn