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From:   Sabyasachi Gupta <sabyasachi.linux@gmail.com>
Date:   Wed, 5 Dec 2018 10:11:56 +0530
Message-ID: <CAJr6mf3d4vEQBk2HEsxnoX4HKisoBV1ywRhekq_homot_DJemw@mail.gmail.com>
Subject: Re: [PATCH] arch/powerpc: Use dma_zalloc_coherent
To:     benh@kernel.crashing.org, paulus@samba.org, mpe@ellerman.id.au
Cc:     Souptick Joarder <jrdr.linux@gmail.com>,
        linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
        Brajeswar Ghosh <brajeswar.linux@gmail.com>
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On Mon, Nov 5, 2018 at 7:52 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/sysdev/fsl_rmu.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
>
> diff --git a/arch/powerpc/sysdev/fsl_rmu.c b/arch/powerpc/sysdev/fsl_rmu.c
> index 88b35a3d..8b0ebf3 100644
> --- a/arch/powerpc/sysdev/fsl_rmu.c
> +++ b/arch/powerpc/sysdev/fsl_rmu.c
> @@ -756,15 +756,13 @@ fsl_open_outb_mbox(struct rio_mport *mport, void *dev_id, int mbox, int entries)
>         }
>
>         /* Initialize outbound message descriptor ring */
> -       rmu->msg_tx_ring.virt = dma_alloc_coherent(priv->dev,
> +       rmu->msg_tx_ring.virt = dma_zalloc_coherent(priv->dev,
>                                 rmu->msg_tx_ring.size * RIO_MSG_DESC_SIZE,
>                                 &rmu->msg_tx_ring.phys, GFP_KERNEL);
>         if (!rmu->msg_tx_ring.virt) {
>                 rc = -ENOMEM;
>                 goto out_dma;
>         }
> -       memset(rmu->msg_tx_ring.virt, 0,
> -                       rmu->msg_tx_ring.size * RIO_MSG_DESC_SIZE);
>         rmu->msg_tx_ring.tx_slot = 0;
>
>         /* Point dequeue/enqueue pointers at first entry in ring */
> --
> 2.7.4
>