linux-kernel - Re: [PATCH] pci: pciehp update the slot bridge res to get big range for pcie devices

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Date:	Wed, 28 Oct 2009 15:26:40 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
CC:	Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	Alex Chiang <achiang@...com>,
	Ivan Kokshaysky <ink@...assic.park.msu.ru>,
	Bjorn Helgaas <bjorn.helgaas@...com>
Subject: Re: [PATCH] pci: pciehp update the slot bridge res to get big range
 for pcie devices

Yinghai Lu wrote:

>>>
>>> Which means your patch would cause a regression in my setup.
>> ok, may need to compare new range size and old range size before clear it.
> 
> after closing look up the code, it looks it will not break your setup.
> 
> 1. before the patches:
> a. when master card is inserted, all bridge in that card will get assigned with min_size
> b. when new cards is inserted to those slots in master card, will get assigned in the bridge size.
> 
> 2. after the patches: v5
> a. booted up, all leaf bridge mmio get clearred.
> b. when master card is inserted, all bridge in that card will get assigned with min_size, and master bridge will be sum of them
> c. when new cards is inserted to those slots in master card, will get assigned in the bridge size.
> 
> can you check those two patches in your setup to verify it?
> http://patchwork.kernel.org/patch/56344/
> http://patchwork.kernel.org/patch/56343/

on top Jesse today's PCI tree.

YH
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