linux-kernel - Re: [PATCH v4] staging: fsl-mc: move bus driver out of staging

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Date:   Tue, 19 Dec 2017 15:48:02 +0100
From:   Greg KH <gregkh@...uxfoundation.org>
To:     laurentiu.tudor@....com
Cc:     ruxandra.radulescu@....com, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org, bogdan.purcareata@....com,
        leoyang.li@....com, stuyoder@...il.com, roy.pledge@....com,
        andrew@...n.ch, linux-arm-kernel@...ts.infradead.org,
        Stuart Yoder <stuart.yoder@....com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Jason Cooper <jason@...edaemon.net>,
        Marc Zyngier <marc.zyngier@....com>
Subject: Re: [PATCH v4] staging: fsl-mc: move bus driver out of staging

On Wed, Nov 29, 2017 at 12:08:44PM +0200, laurentiu.tudor@....com wrote:
> From: Stuart Yoder <stuart.yoder@....com>
> 
> 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 <stuyoder@...il.com>
> Signed-off-by: Laurentiu Tudor <laurentiu.tudor@....com>
> [Laurentiu: rebased, add dpaa2_eth and dpio #include updates]
> Cc: Thomas Gleixner <tglx@...utronix.de>
> Cc: Jason Cooper <jason@...edaemon.net>
> Cc: Marc Zyngier <marc.zyngier@....com>
> ---
> 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 :(

Your "public" .h file does not need to go into a subdirectory, just name
it fsl-mc.h and put it in include/linux/.

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?

For this initial move, only move the bus "core" code out, not the other
stuff like:

>  drivers/irqchip/Makefile                           |   1 +
>  drivers/irqchip/irq-gic-v3-its-fsl-mc-msi.c        | 119 +++

these should be a separate file move, right?

>  drivers/staging/fsl-dpaa2/ethernet/README          |   2 +-

Why does a README file for a different driver need to be touched?

>  drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c     |   2 +-
>  drivers/staging/fsl-dpaa2/ethernet/dpni.c          |   2 +-
>  drivers/staging/fsl-mc/README.txt                  | 386 ---------

This file gets moved to the Documentation directory, yet it is not tied
into the documentation build process, that's not good.  It doesn't need
to have a separate directory either, right?

And speaking of documentation, you have directories in sysfs, yet no
Documentation/ABI/ files describing them.  Please fix that up.

that's a good start :)

thanks,

greg k-h