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

From: Rob Herring <robh@kernel.org>
To: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Cc: "Jingoo Han" <jingoohan1@gmail.com>,
	"Gustavo Pimentel" <gustavo.pimentel@synopsys.com>,
	"Bjorn Helgaas" <bhelgaas@google.com>,
	"Lorenzo Pieralisi" <lorenzo.pieralisi@arm.com>,
	"Krzysztof Wilczyński" <kw@linux.com>,
	"Serge Semin" <fancer.lancer@gmail.com>,
	"Alexey Malahov" <Alexey.Malahov@baikalelectronics.ru>,
	"Pavel Parkhomenko" <Pavel.Parkhomenko@baikalelectronics.ru>,
	"Frank Li" <Frank.Li@nxp.com>,
	"Manivannan Sadhasivam" <manivannan.sadhasivam@linaro.org>,
	linux-pci@vger.kernel.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 10/17] PCI: dwc: Drop iATU regions enumeration - dw_pcie_region_type
Date: Mon, 16 May 2022 15:49:42 -0500	[thread overview]
Message-ID: <20220516204942.GG3209795-robh@kernel.org> (raw)
In-Reply-To: <20220503214638.1895-11-Sergey.Semin@baikalelectronics.ru>

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@baikalelectronics.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@kernel.org>