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From: David Henningsson <david.henningsson@canonical.com>
To: Bjorn Helgaas <bhelgaas@google.com>
Cc: "linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>,
	Andreas Noever <andreas.noever@gmail.com>
Subject: Re: [PATCH] Add pci=assign-busses quirk to Dell Latitude D505
Date: Thu, 11 Sep 2014 10:13:09 +0200	[thread overview]
Message-ID: <54115995.5020107@canonical.com> (raw)
In-Reply-To: <CAErSpo6DDCkrew8rwkNX8=gzc19vErY5iafPBN4oKw_Ww792=g@mail.gmail.com>



On 2014-09-10 20:08, Bjorn Helgaas wrote:
> [+cc Andreas]
> v3.16 fails with:
>
>    pci 0000:01:01.0: can't allocate child bus 01 from [bus 01]
>
> which Andreas added with fc1b253141b3 ("PCI: Don't scan random busses
> in pci_scan_bridge()").  But I don't understand that code well enough
> to know whether this commit is actually the cause of the problem.
>
> And I also haven't figured out how "pci=assign-busses" makes a difference.
>
> David, would you mind turning on CONFIG_DYNAMIC_DEBUG=y in your v3.16
> kernel, adding  'dyndbg="file probe.c +p"' to your boot arguments, and
> collecting another dmesg log?

Thanks for looking at this (and sorry for not having done a bisect yet).

Anyhow, a new dmesg log has now been posted at kernel bugzilla #83441. 
It has a few more lines starting with "pci_bus" but nothing that really 
stands out AFAICT.


-- 
David Henningsson, Canonical Ltd.
https://launchpad.net/~diwic

  parent reply	other threads:[~2014-09-11  8:13 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-08-29  9:10 [PATCH] Add pci=assign-busses quirk to Dell Latitude D505 David Henningsson
2014-08-29 14:22 ` Bjorn Helgaas
2014-08-29 14:44   ` David Henningsson
2014-08-29 17:36     ` Bjorn Helgaas
2014-09-10 18:08       ` Bjorn Helgaas
2014-09-10 19:50         ` Andreas Noever
2014-09-10 20:37           ` Bjorn Helgaas
2014-09-11  8:13         ` David Henningsson [this message]
2014-09-13  3:18           ` Bjorn Helgaas
2014-09-14 22:10             ` Andreas Noever
2014-09-15  9:53               ` Wei Yang
2014-09-15 10:04                 ` Andreas Noever
2014-09-16  1:37                   ` Wei Yang
2014-09-16  3:00                     ` Gavin Shan
2014-09-15 19:03                 ` Bjorn Helgaas
2014-09-16  8:49                   ` Wei Yang
2014-09-19 17:04             ` Bjorn Helgaas

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