On Fri, 6 Sep 2019 18:47:09 +0000 John Stultz wrote:
>
> +static int system_heap_allocate(struct dma_heap *heap,
> + unsigned long len,
> + unsigned long fd_flags,
> + unsigned long heap_flags)
> +{
> + struct heap_helper_buffer *helper_buffer;
> + struct dma_buf *dmabuf;
> + int ret = -ENOMEM;
> + pgoff_t pg;
> +
> + helper_buffer = kzalloc(sizeof(*helper_buffer), GFP_KERNEL);
> + if (!helper_buffer)
> + return -ENOMEM;
> +
> + init_heap_helper_buffer(helper_buffer, system_heap_free);
> + helper_buffer->flags = heap_flags;
> + helper_buffer->heap = heap;
> + helper_buffer->size = len;
> +
A couple of lines looks needed to handle len if it is not
PAGE_SIZE aligned.
> + helper_buffer->pagecount = len / PAGE_SIZE;
> + helper_buffer->pages = kmalloc_array(helper_buffer->pagecount,
> + sizeof(*helper_buffer->pages),
> + GFP_KERNEL);
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