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From:   Sabyasachi Gupta <sabyasachi.linux@gmail.com>
Date:   Thu, 15 Nov 2018 23:29:52 +0530
Message-ID: <CAJr6mf1nOouU31WF_xb_46wDebPQ-7+NTCiSKBjLyQta2mny6w@mail.gmail.com>
Subject: Re: [PATCH] arch/powerpc: Use dma_zalloc_coherent
To:     benh@kernel.crashing.org, paulus@samba.org, mpe@ellerman.id.au,
        joe@perches.com, darren@stevens-zone.net, christophe.leroy@c-s.fr,
        geoff@infradead.org
Cc:     Souptick Joarder <jrdr.linux@gmail.com>,
        linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
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On Mon, Nov 5, 2018 at 8:58 AM Sabyasachi Gupta
<sabyasachi.linux@gmail.com> wrote:
>
> Replaced dma_alloc_coherent + memset with dma_zalloc_coherent
>
> Signed-off-by: Sabyasachi Gupta <sabyasachi.linux@gmail.com>

Any comment on this patch?

> ---
>  arch/powerpc/platforms/pasemi/dma_lib.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
>
> diff --git a/arch/powerpc/platforms/pasemi/dma_lib.c b/arch/powerpc/platforms/pasemi/dma_lib.c
> index 53384eb..d18d164 100644
> --- a/arch/powerpc/platforms/pasemi/dma_lib.c
> +++ b/arch/powerpc/platforms/pasemi/dma_lib.c
> @@ -255,15 +255,13 @@ int pasemi_dma_alloc_ring(struct pasemi_dmachan *chan, int ring_size)
>
>         chan->ring_size = ring_size;
>
> -       chan->ring_virt = dma_alloc_coherent(&dma_pdev->dev,
> +       chan->ring_virt = dma_zalloc_coherent(&dma_pdev->dev,
>                                              ring_size * sizeof(u64),
>                                              &chan->ring_dma, GFP_KERNEL);
>
>         if (!chan->ring_virt)
>                 return -ENOMEM;
>
> -       memset(chan->ring_virt, 0, ring_size * sizeof(u64));
> -
>         return 0;
>  }
>  EXPORT_SYMBOL(pasemi_dma_alloc_ring);
> --
> 2.7.4
>