linux-kernel - Re: [PATCH v9 0/3] Tango PCIe controller support

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Date:   Wed, 5 Jul 2017 00:55:37 +0200
From:   Mason <slash.tmp@...e.fr>
To:     Bjorn Helgaas <helgaas@...nel.org>
Cc:     Marc Gonzalez <marc_gonzalez@...madesigns.com>,
        Marc Zyngier <marc.zyngier@....com>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-pci <linux-pci@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        LKML <linux-kernel@...r.kernel.org>,
        DT <devicetree@...r.kernel.org>,
        Thibaud Cornic <thibaud_cornic@...madesigns.com>
Subject: Re: [PATCH v9 0/3] Tango PCIe controller support

On 04/07/2017 22:24, Bjorn Helgaas wrote:

> On Tue, Jun 20, 2017 at 10:12:57AM +0200, Marc Gonzalez wrote:
>
>> Marc Z pointed out that posting partial series is not ideal.
>> Collect last-minute fixups into a single patch series.
>>
>> - Bump series to v9 to avoid any ambiguity
>> - Add Rob's Ack on patch 1
>>
>> Marc Gonzalez (3):
>>   PCI: Add DT binding for tango PCIe controller
>>   PCI: Add tango PCIe host bridge support
>>   PCI: Add tango MSI controller support
>>
>>  .../devicetree/bindings/pci/tango-pcie.txt         |  29 ++
>>  drivers/pci/host/Kconfig                           |   8 +
>>  drivers/pci/host/Makefile                          |   1 +
>>  drivers/pci/host/pcie-tango.c                      | 390 +++++++++++++++++++++
>>  include/linux/pci_ids.h                            |   2 +
>>  5 files changed, 430 insertions(+)
>>  create mode 100644 Documentation/devicetree/bindings/pci/tango-pcie.txt
>>  create mode 100644 drivers/pci/host/pcie-tango.c
> 
> I made the trivial changes I mentioned, added a dependency on
> CONFIG_BROKEN (for the config/MMIO muxing issue), and put these on
> pci/host-tango.  I can't build or test this, so I probably broke
> something in the process.  I think the combination of the boot-time
> warning, the taint, and CONFIG_BROKEN is a reasonable amount of
> warning that a user should expect issues.
> 
> Can you take a look and see if it works for you?
> 
> https://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git/log/?h=pci/host-tango

Thanks. I'll take it for a spin ASAP.

TAINT_CRAP... Smirk. I didn't see that one in the docs:
https://www.kernel.org/doc/html/latest/admin-guide/tainted-kernels.html

Oh wait... TAINT_CRAP is "C" => a staging driver has been loaded

The one issue I anticipate with "depends on BROKEN" is
when I add support for revision 2, which isn't broken.

Regards.