linux-kernel - Re: [PATCH 3/4] dma-buf: heaps: add chunk heap to dmabuf heaps

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Date:   Thu, 19 Nov 2020 10:16:14 +0900
From:   Hyesoo Yu <hyesoo.yu@...sung.com>
To:     Hillf Danton <hdanton@...a.com>
Cc:     Minchan Kim <minchan@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-mm <linux-mm@...ck.org>, john.stultz@...aro.org,
        linux-media@...r.kernel.org
Subject: Re: [PATCH 3/4] dma-buf: heaps: add chunk heap to dmabuf heaps

Hello, Hillf danton.

On Wed, Nov 18, 2020 at 05:00:13PM +0800, Hillf Danton wrote:
> On Tue, 17 Nov 2020 10:19:34 -0800 Minchan Kim wrote:
> +
> +static int chunk_heap_mmap(struct dma_buf *dmabuf, struct vm_area_struct *vma)
> +{
> +	struct chunk_heap_buffer *buffer = dmabuf->priv;
> +	struct sg_table *table = &buffer->sg_table;
> +	unsigned long addr = vma->vm_start;
> +	struct sg_page_iter piter;
> +	int ret;
> +
> +	for_each_sgtable_page(table, &piter, vma->vm_pgoff) {
> +		struct page *page = sg_page_iter_page(&piter);
> +
> +		ret = remap_pfn_range(vma, addr, page_to_pfn(page), PAGE_SIZE,
> +				      vma->vm_page_prot);
> +		if (ret)
> +			return ret;
> +		addr = PAGE_SIZE;
> 
> Typo?
> 		addr += PAGE_SIZE;
> 

Yes, It is typo. I will change it.

Thanks for your review.
Regards.

> +		if (addr >= vma->vm_end)
> +			return 0;
> +	}
> +	return 0;
> +}
>