linux-kernel - Re: [PATCH v2 10/17] PCI: dwc: Drop iATU regions enumeration

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Message-ID: <20220516204942.GG3209795-robh@kernel.org>
Date:   Mon, 16 May 2022 15:49:42 -0500
From:   Rob Herring <robh@...nel.org>
To:     Serge Semin <Sergey.Semin@...kalelectronics.ru>
Cc:     Jingoo Han <jingoohan1@...il.com>,
        Gustavo Pimentel <gustavo.pimentel@...opsys.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Serge Semin <fancer.lancer@...il.com>,
        Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>,
        Pavel Parkhomenko <Pavel.Parkhomenko@...kalelectronics.ru>,
        Frank Li <Frank.Li@....com>,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        linux-pci@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 10/17] PCI: dwc: Drop iATU regions enumeration -
 dw_pcie_region_type

On Wed, May 04, 2022 at 12:46:31AM +0300, Serge Semin wrote:
> There is no point in having the dw_pcie_region_type enumeration for almost
> the same reasons as it was stated for dw_pcie_as_type. First of all it's
> redundant since the driver already has a set of the macros declared which
> describe the possible inbound and outbound iATU regions. Having an
> addition abstraction just needlessly complicates the code. Secondly
> checking the region type passed to the dw_pcie_disable_atu() method for
> validity is pointless since the erroneous situation is just ignored in the
> current method implementation. So to speak let's drop the redundant
> dw_pcie_region_type enumeration replacing it with the direct iATU
> direction macro usage.
> 
> Since the dw_pcie_disable_atu() method now directly accepts the
> in-/outbound iATU region direction instead of the abstract region type we
> need to change the argument name and the arguments order. The later change
> makes the function prototype looking more logical since the passed index
> indicates an iATU window within the regions with the corresponding
> direction.
> 
> Signed-off-by: Serge Semin <Sergey.Semin@...kalelectronics.ru>
> 
> ---
> 
> Changelog v2:
> - Move this patch to being applied before the IB/OB iATU windows setup
>   simplification patch (@Rob).
> ---
>  .../pci/controller/dwc/pcie-designware-ep.c   |  4 +--
>  .../pci/controller/dwc/pcie-designware-host.c |  2 +-
>  drivers/pci/controller/dwc/pcie-designware.c  | 28 +++++--------------
>  drivers/pci/controller/dwc/pcie-designware.h  | 13 ++-------
>  4 files changed, 13 insertions(+), 34 deletions(-)

Reviewed-by: Rob Herring <robh@...nel.org>