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Date:   Mon, 16 Mar 2020 16:51:16 +0100
From:   Jean-Philippe Brucker <jean-philippe@linaro.org>
To:     Joerg Roedel <joro@8bytes.org>
Cc:     iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org,
        linux-arm-msm@vger.kernel.org, linux-mediatek@lists.infradead.org,
        virtualization@lists.linux-foundation.org,
        Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
        Hanjun Guo <guohanjun@huawei.com>,
        Sudeep Holla <sudeep.holla@arm.com>,
        Rob Clark <robdclark@gmail.com>, Sean Paul <sean@poorly.run>,
        Will Deacon <will@kernel.org>,
        Robin Murphy <robin.murphy@arm.com>,
        Matthias Brugger <matthias.bgg@gmail.com>,
        Thierry Reding <thierry.reding@gmail.com>,
        Andy Gross <agross@kernel.org>,
        Bjorn Andersson <bjorn.andersson@linaro.org>,
        Joerg Roedel <jroedel@suse.de>
Subject: Re: [PATCH 12/15] iommu/mediatek: Use accessor functions for iommu
 private data
Message-ID: <20200316155116.GL304669@myrica>
References: <20200310091229.29830-1-joro@8bytes.org>
 <20200310091229.29830-13-joro@8bytes.org>
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On Tue, Mar 10, 2020 at 10:12:26AM +0100, Joerg Roedel wrote:
> From: Joerg Roedel <jroedel@suse.de>
> 
> Make use of dev_iommu_priv_set/get() functions.
> 
> Signed-off-by: Joerg Roedel <jroedel@suse.de>

Reviewed-by: Jean-Philippe Brucker <jean-philippe@linaro.org>

> ---
>  drivers/iommu/mtk_iommu.c    | 13 ++++++-------
>  drivers/iommu/mtk_iommu_v1.c | 14 +++++++-------
>  2 files changed, 13 insertions(+), 14 deletions(-)
> 
> diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
> index 95945f467c03..5f4d6df59cf6 100644
> --- a/drivers/iommu/mtk_iommu.c
> +++ b/drivers/iommu/mtk_iommu.c
> @@ -358,8 +358,8 @@ static void mtk_iommu_domain_free(struct iommu_domain *domain)
>  static int mtk_iommu_attach_device(struct iommu_domain *domain,
>  				   struct device *dev)
>  {
> +	struct mtk_iommu_data *data = dev_iommu_priv_get(dev);
>  	struct mtk_iommu_domain *dom = to_mtk_domain(domain);
> -	struct mtk_iommu_data *data = dev_iommu_fwspec_get(dev)->iommu_priv;
>  
>  	if (!data)
>  		return -ENODEV;
> @@ -378,7 +378,7 @@ static int mtk_iommu_attach_device(struct iommu_domain *domain,
>  static void mtk_iommu_detach_device(struct iommu_domain *domain,
>  				    struct device *dev)
>  {
> -	struct mtk_iommu_data *data = dev_iommu_fwspec_get(dev)->iommu_priv;
> +	struct mtk_iommu_data *data = dev_iommu_priv_get(dev);
>  
>  	if (!data)
>  		return;
> @@ -450,7 +450,7 @@ static int mtk_iommu_add_device(struct device *dev)
>  	if (!fwspec || fwspec->ops != &mtk_iommu_ops)
>  		return -ENODEV; /* Not a iommu client device */
>  
> -	data = fwspec->iommu_priv;
> +	data = dev_iommu_priv_get(dev);
>  	iommu_device_link(&data->iommu, dev);
>  
>  	group = iommu_group_get_for_dev(dev);
> @@ -469,7 +469,7 @@ static void mtk_iommu_remove_device(struct device *dev)
>  	if (!fwspec || fwspec->ops != &mtk_iommu_ops)
>  		return;
>  
> -	data = fwspec->iommu_priv;
> +	data = dev_iommu_priv_get(dev);
>  	iommu_device_unlink(&data->iommu, dev);
>  
>  	iommu_group_remove_device(dev);
> @@ -496,7 +496,6 @@ static struct iommu_group *mtk_iommu_device_group(struct device *dev)
>  
>  static int mtk_iommu_of_xlate(struct device *dev, struct of_phandle_args *args)
>  {
> -	struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
>  	struct platform_device *m4updev;
>  
>  	if (args->args_count != 1) {
> @@ -505,13 +504,13 @@ static int mtk_iommu_of_xlate(struct device *dev, struct of_phandle_args *args)
>  		return -EINVAL;
>  	}
>  
> -	if (!fwspec->iommu_priv) {
> +	if (!dev_iommu_priv_get(dev)) {
>  		/* Get the m4u device */
>  		m4updev = of_find_device_by_node(args->np);
>  		if (WARN_ON(!m4updev))
>  			return -EINVAL;
>  
> -		fwspec->iommu_priv = platform_get_drvdata(m4updev);
> +		dev_iommu_priv_set(dev, platform_get_drvdata(m4updev));
>  	}
>  
>  	return iommu_fwspec_add_ids(dev, args->args, 1);
> diff --git a/drivers/iommu/mtk_iommu_v1.c b/drivers/iommu/mtk_iommu_v1.c
> index e93b94ecac45..9930ac7413cc 100644
> --- a/drivers/iommu/mtk_iommu_v1.c
> +++ b/drivers/iommu/mtk_iommu_v1.c
> @@ -263,8 +263,8 @@ static void mtk_iommu_domain_free(struct iommu_domain *domain)
>  static int mtk_iommu_attach_device(struct iommu_domain *domain,
>  				   struct device *dev)
>  {
> +	struct mtk_iommu_data *data = dev_iommu_priv_get(dev);
>  	struct mtk_iommu_domain *dom = to_mtk_domain(domain);
> -	struct mtk_iommu_data *data = dev_iommu_fwspec_get(dev)->iommu_priv;
>  	int ret;
>  
>  	if (!data)
> @@ -286,7 +286,7 @@ static int mtk_iommu_attach_device(struct iommu_domain *domain,
>  static void mtk_iommu_detach_device(struct iommu_domain *domain,
>  				    struct device *dev)
>  {
> -	struct mtk_iommu_data *data = dev_iommu_fwspec_get(dev)->iommu_priv;
> +	struct mtk_iommu_data *data = dev_iommu_priv_get(dev);
>  
>  	if (!data)
>  		return;
> @@ -387,20 +387,20 @@ static int mtk_iommu_create_mapping(struct device *dev,
>  		return -EINVAL;
>  	}
>  
> -	if (!fwspec->iommu_priv) {
> +	if (!dev_iommu_priv_get(dev)) {
>  		/* Get the m4u device */
>  		m4updev = of_find_device_by_node(args->np);
>  		if (WARN_ON(!m4updev))
>  			return -EINVAL;
>  
> -		fwspec->iommu_priv = platform_get_drvdata(m4updev);
> +		dev_iommu_priv_set(dev, platform_get_drvdata(m4updev));
>  	}
>  
>  	ret = iommu_fwspec_add_ids(dev, args->args, 1);
>  	if (ret)
>  		return ret;
>  
> -	data = fwspec->iommu_priv;
> +	data = dev_iommu_priv_get(dev);
>  	m4udev = data->dev;
>  	mtk_mapping = m4udev->archdata.iommu;
>  	if (!mtk_mapping) {
> @@ -459,7 +459,7 @@ static int mtk_iommu_add_device(struct device *dev)
>  	if (err)
>  		return err;
>  
> -	data = fwspec->iommu_priv;
> +	data = dev_iommu_priv_get(dev)
>  	mtk_mapping = data->dev->archdata.iommu;
>  	err = arm_iommu_attach_device(dev, mtk_mapping);
>  	if (err) {
> @@ -478,7 +478,7 @@ static void mtk_iommu_remove_device(struct device *dev)
>  	if (!fwspec || fwspec->ops != &mtk_iommu_ops)
>  		return;
>  
> -	data = fwspec->iommu_priv;
> +	data = dev_iommu_priv_get(dev)
>  	iommu_device_unlink(&data->iommu, dev);
>  
>  	iommu_group_remove_device(dev);
> -- 
> 2.17.1
>