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Date:   Wed, 20 Dec 2017 10:26:49 +0000
From:   Laurentiu Tudor <>
To:     Greg KH <>
CC:     Ruxandra Ioana Radulescu <>,
        "" <>,
        "" <>,
        "Bogdan Purcareata" <>,
        Leo Li <>,
        "" <>,
        Roy Pledge <>,
        "" <>,
        Stuart Yoder <>,
        Thomas Gleixner <>,
        Jason Cooper <>,
        Marc Zyngier <>
Subject: Re: [PATCH v4] staging: fsl-mc: move bus driver out of staging

On 12/19/2017 06:10 PM, Greg KH wrote:
> On Tue, Dec 19, 2017 at 03:39:44PM +0000, Laurentiu Tudor wrote:
>> On 12/19/2017 05:29 PM, Greg KH wrote:
>>> On Tue, Dec 19, 2017 at 03:21:19PM +0000, Laurentiu Tudor wrote:
>>>> On 12/19/2017 04:48 PM, Greg KH wrote:
>>>>> On Wed, Nov 29, 2017 at 12:08:44PM +0200, wrote:
>>>>>> From: Stuart Yoder <>
>>>>>> Move the source files out of staging into their final locations:
>>>>>>      -include files in drivers/staging/fsl-mc/include go to include/linux/fsl
>>>>>>      -irq-gic-v3-its-fsl-mc-msi.c goes to drivers/irqchip
>>>>>>      -source in drivers/staging/fsl-mc/bus goes to drivers/bus/fsl-mc
>>>>>>      -README.txt, providing and overview of DPAA goes to
>>>>>>       Documentation/dpaa2/overview.txt
>>>>>> Update or delete other remaining staging files-- Makefile, Kconfig, TODO.
>>>>>> Update dpaa2_eth and dpio staging drivers.
>>>>>> Signed-off-by: Stuart Yoder <>
>>>>>> Signed-off-by: Laurentiu Tudor <>
>>>>>> [Laurentiu: rebased, add dpaa2_eth and dpio #include updates]
>>>>>> Cc: Thomas Gleixner <>
>>>>>> Cc: Jason Cooper <>
>>>>>> Cc: Marc Zyngier <>
>>>>>> ---
>>>>>> Notes:
>>>>>>        -v4:
>>>>>>          - regenerated patch with renames detection disabled (Andrew Lunn)
>>>>>>        -v3:
>>>>>>          - rebased
>>>>> Ok, meta-comments on the structure of the code.
>>>>> You have 8 .h files that are "private" to your bus logic.  That's 7 too
>>>>> many, some of them have a bigger license header than actual content :)
>>>>> Please consolidate into 1.
>>>>> Also, the headers should be moved to SPDX format to get rid of the
>>>>> boilerplate.  I _think_ it's BSD/GPL, right?  Hard to tell :(
>>>> It's 3-clause BSD and GPLv2. Will make it clear when moving to SPDX.
>>> Thanks.
>>>>> Your "public" .h file does not need to go into a subdirectory, just name
>>>>> it fsl-mc.h and put it in include/linux/.
>>>> There's already a "fsl" subdirectory in include/linux/ so it seemed to
>>>> make sense to use it.
>>> Ah, missed that.  Ok, nevermind :)`
>>>>> One comment on the fields in your .h file, all of the user/kernel
>>>>> crossing boundry structures need to use the "__" variant of types, like
>>>>> "__u8" and the like.  You mix and match them for some reason, you need
>>>>> to be consistent.
>>>>> Also, what's up with the .h files in drivers/staging/fsl-bus/include?
>>>>> You didn't touch those with this movement, right?  Why?
>>>> Those are not part of the bus "core". Some of them are part of the DPBP
>>>> and DPCON device types APIs and are used by drivers probing on this bus
>>>> and the rest are part of the DPIO driver which is also used by other
>>>> drivers. Since these devices (DPBP, DPCON, DPIO) are interfaces used by
>>>> all the other drivers it made sense to group them together with the bus.
>>> But all of these .h files are only used by the code in this specific
>>> directory, no where else.
>> They are also used by our ethernet driver, see:
>>     drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.h
> Ick, really?  Then they should not be buried in a bus-specific
> location, but rather be in include/linux/SOMEWHERE, right?

Right. The goal is that in the end, all headers be moved to the already 
existing include/linux/fsl/. For now I've left these in staging because 
they are not part of the bus "core" infrastructure.

Best Regards, Laurentiu

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