linux-kernel - Re: How to reserve pci bus numbers for hotplug?

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Date:	Wed, 11 Dec 2013 16:21:09 -0800
From:	Yinghai Lu <yinghai@...nel.org>
To:	Andreas Noever <andreas.noever@...il.com>
Cc:	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: How to reserve pci bus numbers for hotplug?

On Wed, Dec 11, 2013 at 3:37 PM, Andreas Noever
<andreas.noever@...il.com> wrote:

> If I could get Linux to assign enough resources (bus numbers for now)
> then I could drop the acpi_osi parameter and make thunderbolt work
> after suspend... So, is there an easy way to fix this? (Quirks,
> reconfiguring bus number assignments from a platform driver, ...?)

please check if busn_alloc at

git://git.kernel.org/pub/scm/linux/kernel/git/yinghai/linux-yinghai.git
for-pci-busn-alloc-3.14

could help.

  resources: Split out __allocate_resource()
  resources: Add resource_shrink_parents_top()
  resources: Add probe_resource()
  resources: Replace registered resource in tree.
  PCI: Add pci_bus_extend/shrink_top()
  PCI: Probe safe range that we can use for unassigned bridge.
  PCI: Add pci_bus_replace_busn_res()
  PCI: Allocate bus range instead of use max blindly
  PCI: Strict checking of valid range for bridge
  PCI: Kill pci_fixup_parent_subordinate_busnr()
  PCI: Seperate child bus scanning to two passes overall
  pcmcia: Remove workaround for fixing pci parent bus subordinate
  PCI, pciehp: Remove not needed bus number range checking
  PCI: More strict checking of valid range for bridge
  PCI: Don't shrink too much for hotplug bridge
  expand_bus_for_sriov
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