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Message-ID: <20210114192732.GA3401278@robh.at.kernel.org>
Date: Thu, 14 Jan 2021 13:27:32 -0600
From: Rob Herring <robh@...nel.org>
To: Yong Wu <yong.wu@...iatek.com>
Cc: Joerg Roedel <joro@...tes.org>,
Matthias Brugger <matthias.bgg@...il.com>,
Will Deacon <will@...nel.org>,
Robin Murphy <robin.murphy@....com>,
Krzysztof Kozlowski <krzk@...nel.org>,
Evan Green <evgreen@...omium.org>,
Tomasz Figa <tfiga@...gle.com>,
linux-mediatek@...ts.infradead.org, srv_heupstream@...iatek.com,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
iommu@...ts.linux-foundation.org, youlin.pei@...iatek.com,
Nicolas Boichat <drinkcat@...omium.org>, anan.sun@...iatek.com,
chao.hao@...iatek.com, Frank Rowand <frowand.list@...il.com>
Subject: Re: [PATCH v6 06/33] of/device: Move dma_range_map before
of_iommu_configure
On Mon, Jan 11, 2021 at 07:18:47PM +0800, Yong Wu wrote:
> "dev->dma_range_map" contains the devices' dma_ranges information,
> This patch moves dma_range_map before of_iommu_configure. The iommu
> driver may need to know the dma_address requirements of its iommu
> consumer devices.
>
> CC: Rob Herring <robh+dt@...nel.org>
> CC: Frank Rowand <frowand.list@...il.com>
> Signed-off-by: Yong Wu <yong.wu@...iatek.com>
> ---
> drivers/of/device.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/of/device.c b/drivers/of/device.c
> index aedfaaafd3e7..1d84636149df 100644
> --- a/drivers/of/device.c
> +++ b/drivers/of/device.c
> @@ -170,9 +170,11 @@ int of_dma_configure_id(struct device *dev, struct device_node *np,
> dev_dbg(dev, "device is%sdma coherent\n",
> coherent ? " " : " not ");
>
> + dev->dma_range_map = map;
> iommu = of_iommu_configure(dev, np, id);
> if (PTR_ERR(iommu) == -EPROBE_DEFER) {
> kfree(map);
> + dev->dma_range_map = NULL;
Not really going to matter, but you should probably clear dma_range_map
before what it points to is freed.
With that,
Reviewed-by: Rob Herring <robh@...nel.org>
> return -EPROBE_DEFER;
> }
>
> @@ -181,7 +183,6 @@ int of_dma_configure_id(struct device *dev, struct device_node *np,
>
> arch_setup_dma_ops(dev, dma_start, size, iommu, coherent);
>
> - dev->dma_range_map = map;
> return 0;
> }
> EXPORT_SYMBOL_GPL(of_dma_configure_id);
> --
> 2.18.0
>
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