linux-kernel - Re: [PATCH V3 0/4] PCI: ACPI: Setting up DMA coherency for PCI device from

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Message-ID: <55F14A4E.80206@linaro.org>
Date:	Thu, 10 Sep 2015 17:15:58 +0800
From:	Hanjun Guo <hanjun.guo@...aro.org>
To:	Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>,
	bhelgaas@...gle.com, rjw@...ysocki.net, lenb@...nel.org,
	catalin.marinas@....com, will.deacon@....com
CC:	linux-acpi@...r.kernel.org, linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH V3 0/4] PCI: ACPI: Setting up DMA coherency for PCI device
 from _CCA attribute

On 08/26/2015 09:54 PM, Suravee Suthikulpanit wrote:
> This patch adds support to setup DMA coherency for PCI device using
> the ACPI _CCA attribute. According to the ACPI spec, the _CCA attribute
> is required for ARM64. Therefore, this patch is a pre-req for ACPI PCI
> support for ARM64 which is currently in development.
>
> Also, this should not affect other architectures that does not define
> CONFIG_ACPI_CCA_REQUIRED, since the default value is coherent.
>
> I have included the following patch from Jeremy before cleaning up
> the acpi_check_dma() function (in patch 2).
>
>      http://www.spinics.net/lists/linux-usb/msg128582.html)
>
> Changes from V2: (https://lkml.org/lkml/2015/8/25/549)
>      * Return -ENOSUPP instead of -1 (per Rafael's suggestion)
>      * Add WARN() when fail to setup DMA for PCI device when booting
>        ACPI (per Arnd's suggestion)
>      * Added Acked-by from Rob.
>      * Minor clean up
>
> Changes from V1: (https://lkml.org/lkml/2015/8/13/182)
>      * Include patch 1 from Jeremy to enable support for _CCA=0
>      * Clean up acpi_check_dma() per Bjorn suggestions
>      * Split the original V1 patch into two patches (patch 3 and 4)
>
>
> Jeremy Linton (1):
>    Honor ACPI _CCA attribute setting
>
> Suravee Suthikulpanit (3):
>    ACPI/scan: Clean up acpi_check_dma
>    PCI: OF: Move of_pci_dma_configure() to pci_dma_configure()
>    PCI: ACPI: Add support for PCI device DMA coherency

For this series,

Reviewed-by: Hanjun Guo <hanjun.guo@...aro.org>

Thanks
Hanjun
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