linux-kernel - Re: [PATCH v3 09/25] iommu/sprd: Drop IOVA cookie management

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Message-ID: <CABOV4+VPX-RK-mz-GDZLD_qNDxmBSc3hQGLkvj4NKP6sGOLSxQ@mail.gmail.com>
Date:   Fri, 6 Aug 2021 10:15:16 +0800
From:   Chunyan Zhang <zhang.lyra@...il.com>
To:     Robin Murphy <robin.murphy@....com>
Cc:     joro@...tes.org, will@...nel.org, iommu@...ts.linux-foundation.org,
        linux-arm-kernel@...ts.infradead.org,
        LKML <linux-kernel@...r.kernel.org>,
        suravee.suthikulpanit@....com, baolu.lu@...ux.intel.com,
        john.garry@...wei.com, dianders@...omium.org, rajatja@...gle.com,
        chenxiang66@...ilicon.com, Chunyan Zhang <chunyan.zhang@...soc.com>
Subject: Re: [PATCH v3 09/25] iommu/sprd: Drop IOVA cookie management

On Thu, Aug 5, 2021 at 1:18 AM Robin Murphy <robin.murphy@....com> wrote:
>
> The core code bakes its own cookies now.
>
> CC: Chunyan Zhang <chunyan.zhang@...soc.com>
> Signed-off-by: Robin Murphy <robin.murphy@....com>

Thank you for the patch!

Acked-by: Chunyan Zhang <zhang.lyra@...il.com>

>
> ---
>
> v3: Also remove unneeded include
> ---
>  drivers/iommu/sprd-iommu.c | 7 -------
>  1 file changed, 7 deletions(-)
>
> diff --git a/drivers/iommu/sprd-iommu.c b/drivers/iommu/sprd-iommu.c
> index 73dfd9946312..27ac818b0354 100644
> --- a/drivers/iommu/sprd-iommu.c
> +++ b/drivers/iommu/sprd-iommu.c
> @@ -8,7 +8,6 @@
>
>  #include <linux/clk.h>
>  #include <linux/device.h>
> -#include <linux/dma-iommu.h>
>  #include <linux/dma-mapping.h>
>  #include <linux/errno.h>
>  #include <linux/iommu.h>
> @@ -144,11 +143,6 @@ static struct iommu_domain *sprd_iommu_domain_alloc(unsigned int domain_type)
>         if (!dom)
>                 return NULL;
>
> -       if (iommu_get_dma_cookie(&dom->domain)) {
> -               kfree(dom);
> -               return NULL;
> -       }
> -
>         spin_lock_init(&dom->pgtlock);
>
>         dom->domain.geometry.aperture_start = 0;
> @@ -161,7 +155,6 @@ static void sprd_iommu_domain_free(struct iommu_domain *domain)
>  {
>         struct sprd_iommu_domain *dom = to_sprd_domain(domain);
>
> -       iommu_put_dma_cookie(domain);
>         kfree(dom);
>  }
>
> --
> 2.25.1
>