linux-kernel - Re: [PATCH v5 30/38] dmabuf: fix common struct sg

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Date:   Fri, 15 May 2020 12:13:47 +0200
From:   Gerd Hoffmann <kraxel@...hat.com>
To:     Marek Szyprowski <m.szyprowski@...sung.com>
Cc:     dri-devel@...ts.freedesktop.org, iommu@...ts.linux-foundation.org,
        linaro-mm-sig@...ts.linaro.org, linux-kernel@...r.kernel.org,
        Christoph Hellwig <hch@....de>,
        Robin Murphy <robin.murphy@....com>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        linux-arm-kernel@...ts.infradead.org,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Sumit Semwal <sumit.semwal@...aro.org>,
        linux-media@...r.kernel.org
Subject: Re: [PATCH v5 30/38] dmabuf: fix common struct sg_table related
 issues

> diff --git a/drivers/dma-buf/udmabuf.c b/drivers/dma-buf/udmabuf.c
> index acb26c6..89e293b 100644
> --- a/drivers/dma-buf/udmabuf.c
> +++ b/drivers/dma-buf/udmabuf.c
> @@ -63,10 +63,9 @@ static struct sg_table *get_sg_table(struct device *dev, struct dma_buf *buf,
>  					GFP_KERNEL);
>  	if (ret < 0)
>  		goto err;
> -	if (!dma_map_sg(dev, sg->sgl, sg->nents, direction)) {
> -		ret = -EINVAL;
> +	ret = dma_map_sgtable(dev, sg, direction, 0);
> +	if (ret < 0)
>  		goto err;
> -	}
>  	return sg;
>  
>  err:
> @@ -78,7 +77,7 @@ static struct sg_table *get_sg_table(struct device *dev, struct dma_buf *buf,
>  static void put_sg_table(struct device *dev, struct sg_table *sg,
>  			 enum dma_data_direction direction)
>  {
> -	dma_unmap_sg(dev, sg->sgl, sg->nents, direction);
> +	dma_unmap_sgtable(dev, sg, direction, 0);
>  	sg_free_table(sg);
>  	kfree(sg);
>  }

Easy straightforward conversation.

Acked-by: Gerd Hoffmann <kraxel@...hat.com>

take care,
  Gerd