linux-kernel - Re: [PATCH v3 21/23] ata: ahci-dwc: Add platform-specific quirks support

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Date:   Thu, 12 May 2022 19:29:03 +0300
From:   Serge Semin <fancer.lancer@...il.com>
To:     Hannes Reinecke <hare@...e.de>
Cc:     Serge Semin <Sergey.Semin@...kalelectronics.ru>,
        Damien Le Moal <damien.lemoal@...nsource.wdc.com>,
        Hans de Goede <hdegoede@...hat.com>,
        Jens Axboe <axboe@...nel.dk>,
        Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>,
        Pavel Parkhomenko <Pavel.Parkhomenko@...kalelectronics.ru>,
        Rob Herring <robh+dt@...nel.org>, linux-ide@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v3 21/23] ata: ahci-dwc: Add platform-specific quirks
 support

On Thu, May 12, 2022 at 09:12:46AM +0200, Hannes Reinecke wrote:
> On 5/12/22 01:18, Serge Semin wrote:
> > Some DWC AHCI SATA IP-core derivatives require to perform small platform
> > or IP-core specific setups. They are too small to be placed in a dedicated
> > driver. It's just much easier to have a set of quirks for them right in
> > the DWC AHCI driver code. Since we are about to add such platform support,
> > as a pre-requisite we introduce a platform-data based DWC AHCI quirks API.
> > The platform data can be used to define the flags passed to the
> > ahci_platform_get_resources() method, additional AHCI host-flags and a set
> > of callbacks to initialize, re-initialize and clear the platform settings.
> > 
> > Signed-off-by: Serge Semin <Sergey.Semin@...kalelectronics.ru>
> > 
> > ---
> > 
> > Changelog v2:
> > - Change the local objects prefix from 'dwc_ahci_' to 'ahci_dwc_'.
> >    (@Damien)
> > ---
> >   drivers/ata/ahci_dwc.c | 52 ++++++++++++++++++++++++++++++++++++++----
> >   1 file changed, 48 insertions(+), 4 deletions(-)
> > 

> This really could be merged with patch 19; as you're adding a new driver you
> might as well fold this patch in to avoid further modifications.

That merely depends on the development approach. I saw and reviewed
not one kernel patchsets introducing new drivers and adding features
one after another. Moreover there is no kernel patches requirement
which would constitutes not to do so. In this particular case the
modification isn't complicated at all thus can be reviewed as is.

-Sergey

> 
> Cheers,
> 
> Hannes
> -- 
> Dr. Hannes Reinecke		           Kernel Storage Architect
> hare@...e.de			                  +49 911 74053 688
> SUSE Software Solutions Germany GmbH, Maxfeldstr. 5, 90409 Nürnberg
> HRB 36809 (AG Nürnberg), GF: Felix Imendörffer