From mboxrd@z Thu Jan  1 00:00:00 1970
From: okaya@codeaurora.org (okaya at codeaurora.org)
Date: Wed, 30 May 2018 00:44:29 -0700
Subject: [PATCH] PCI: Add pci=safemode option
In-Reply-To: <20180530073735.GA28793@infradead.org>
References: <1527650389-31575-1-git-send-email-okaya@codeaurora.org>
 <20180530043103.GA19734@kroah.com>
 <6c317ed8-cca3-8862-5f3b-12cf14e4d53b@codeaurora.org>
 <20180530073735.GA28793@infradead.org>
Message-ID: <6dfe2db8f974d94c9867f30ec83d9333@codeaurora.org>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

On 2018-05-30 00:37, Christoph Hellwig wrote:
> On Tue, May 29, 2018 at 09:41:33PM -0700, Sinan Kaya wrote:
>> Bjorn and I discussed the need for such a "safe" mode feature when you
>> want to bring up PCI for a platform. You want to turn off everything 
>> as
>> a starter and just stick to bare minimum.
> 
> Can we please make it a config option the instead of adding code
> to every kernel?  Also maybe the bringup should be in the name
> to make this more clear?

One other requirement was to have a runtime option rather than compile 
time option.

When someone reported a problem, we wanted to be able to say "use this 
option and see if system boots" without doing any bisects or 
recompilation.

This would be the first step in troubleshooting a system to see if 
fundamental features are working.

I don't mind changing the name
Bjorn mentioned safe option. I made it safemode. I am looking at Bjorn 
for suggestions at this moment.