linux-kernel - Re: [PATCH v5 2/3] PCI: Add tango PCIe host bridge support

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Message-ID: <0d84a5fc-9549-5fef-837b-4102d2e1f1d2@arm.com>
Date:   Mon, 19 Jun 2017 17:16:21 +0100
From:   Marc Zyngier <marc.zyngier@....com>
To:     Marc Gonzalez <marc_gonzalez@...madesigns.com>,
        Bjorn Helgaas <helgaas@...nel.org>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Robin Murphy <robin.murphy@....com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Liviu Dudau <liviu.dudau@....com>,
        David Laight <david.laight@...lab.com>,
        linux-pci <linux-pci@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Thibaud Cornic <thibaud_cornic@...madesigns.com>,
        LKML <linux-kernel@...r.kernel.org>, Mason <slash.tmp@...e.fr>
Subject: Re: [PATCH v5 2/3] PCI: Add tango PCIe host bridge support

On 19/06/17 17:01, Marc Gonzalez wrote:
> On 19/06/2017 17:58, Marc Zyngier wrote:
>> On 19/06/17 15:50, Marc Gonzalez wrote:
>>> On 07/06/2017 10:19, Marc Gonzalez wrote:
>>>
>>>> On 31/05/2017 15:33, Marc Gonzalez wrote:
>>>>
>>>>> +static int tango_pcie_probe(struct platform_device *pdev)
>>>>> +{
>>>>> +	int ret = -EINVAL;
>>>>> +	void __iomem *base;
>>>>> +	struct resource *res;
>>>>> +	struct tango_pcie *pcie;
>>>>> +	struct device *dev = &pdev->dev;
>>>>> +
>>>>> +	pr_err("MAJOR ISSUE: PCIe config and mem spaces are muxed\n");
>>>>> +	pr_err("Tainting kernel... Use driver at your own risk\n");
>>>>> +	add_taint(TAINT_FIRMWARE_WORKAROUND, LOCKDEP_STILL_OK);
>>>>
>>>> Hello Bjorn,
>>>>
>>>> In v4, your only comment was
>>>> "[muxing config and mem spaces] is a major issue and possibly even
>>>> a security problem [which requires at least an error message and a
>>>> kernel taint].
>>>>
>>>> Were there any other issues with the host bridge support?
>>>
>>> Hello Bjorn,
>>>
>>> I imagine you are now only waiting for Marc Z's Ack of patch 3/3 ?
>>> (AFAIU, all issues have been addressed as of v8 3/3.)
>>
>> Posting partial series is really not ideal, specially as you posted 3 of
>> them in less than 24 hours (and the latest was only 5 days ago).
>>
>> The maintainer is not going to chase you about potentially missing
>> patches...
> 
> So the best course would be posting a new series with all patches
> bumped to v8 then?

No, because there is still the ambiguity of *which* v8 that is. Post a
v9 that supersedes all the previously posted patches.

	M.
-- 
Jazz is not dead. It just smells funny...