linux-kernel - Re: [PATCH v2] dma-buf: align fd_flags and heap_flags with dma_heap_allocation

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Date: Wed, 5 Jun 2024 14:55:11 +0530
From: Sumit Semwal <sumit.semwal@...aro.org>
To: Barry Song <21cnbao@...il.com>
Cc: linaro-mm-sig@...ts.linaro.org, linux-media@...r.kernel.org, 
	Brian.Starkey@....com, benjamin.gaignard@...labora.com, 
	christian.koenig@....com, dri-devel@...ts.freedesktop.org, jstultz@...gle.com, 
	linux-kernel@...r.kernel.org, tjmercier@...gle.com, v-songbaohua@...o.com, 
	hailong.liu@...o.com
Subject: Re: [PATCH v2] dma-buf: align fd_flags and heap_flags with dma_heap_allocation_data

Hello Barry,


On Wed, 5 Jun 2024 at 06:56, Barry Song <21cnbao@...il.com> wrote:
>
> From: Barry Song <v-songbaohua@...o.com>
>
> dma_heap_allocation_data defines the UAPI as follows:
>
>  struct dma_heap_allocation_data {
>         __u64 len;
>         __u32 fd;
>         __u32 fd_flags;
>         __u64 heap_flags;
>  };
>
> However, dma_heap_buffer_alloc() casts both fd_flags and heap_flags
> into unsigned int. We're inconsistent with types in the non UAPI
> arguments. This patch fixes it.

Thank you for your patch; I've pushed it to drm-misc-next.

Best,
Sumit.
>
> Signed-off-by: Barry Song <v-songbaohua@...o.com>
> Acked-by: John Stultz <jstultz@...gle.com>
> ---
>  -v2:
>  collect ack of John, thanks!
>  refine commit message;
>
>  drivers/dma-buf/dma-heap.c    | 4 ++--
>  include/uapi/linux/dma-heap.h | 2 +-
>  2 files changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/dma-buf/dma-heap.c b/drivers/dma-buf/dma-heap.c
> index 84ae708fafe7..2298ca5e112e 100644
> --- a/drivers/dma-buf/dma-heap.c
> +++ b/drivers/dma-buf/dma-heap.c
> @@ -50,8 +50,8 @@ static struct class *dma_heap_class;
>  static DEFINE_XARRAY_ALLOC(dma_heap_minors);
>
>  static int dma_heap_buffer_alloc(struct dma_heap *heap, size_t len,
> -                                unsigned int fd_flags,
> -                                unsigned int heap_flags)
> +                                u32 fd_flags,
> +                                u64 heap_flags)
>  {
>         struct dma_buf *dmabuf;
>         int fd;
> diff --git a/include/uapi/linux/dma-heap.h b/include/uapi/linux/dma-heap.h
> index 6f84fa08e074..a4cf716a49fa 100644
> --- a/include/uapi/linux/dma-heap.h
> +++ b/include/uapi/linux/dma-heap.h
> @@ -19,7 +19,7 @@
>  #define DMA_HEAP_VALID_FD_FLAGS (O_CLOEXEC | O_ACCMODE)
>
>  /* Currently no heap flags */
> -#define DMA_HEAP_VALID_HEAP_FLAGS (0)
> +#define DMA_HEAP_VALID_HEAP_FLAGS (0ULL)
>
>  /**
>   * struct dma_heap_allocation_data - metadata passed from userspace for
> --
> 2.34.1
>


-- 
Thanks and regards,

Sumit Semwal (he / him)
Tech Lead - LCG, Vertical Technologies
Linaro.org │ Open source software for ARM SoCs