linux-kernel - Re: [PATCH] RDMA/hns: Use dma_alloc_coherent() instead of kmalloc/dma_map

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Message-ID: <20211012161112.GA3375648@nvidia.com>
Date:   Tue, 12 Oct 2021 13:11:12 -0300
From:   Jason Gunthorpe <jgg@...dia.com>
To:     Cai Huoqing <caihuoqing@...du.com>
Cc:     Lijun Ou <oulijun@...wei.com>, Weihang Li <liweihang@...wei.com>,
        Doug Ledford <dledford@...hat.com>, linux-rdma@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] RDMA/hns: Use dma_alloc_coherent() instead of
 kmalloc/dma_map_single()

On Sun, Sep 26, 2021 at 02:11:15PM +0800, Cai Huoqing wrote:
> Replacing kmalloc/kfree/dma_map_single/dma_unmap_single()
> with dma_alloc_coherent/dma_free_coherent() helps to reduce
> code size, and simplify the code, and coherent DMA will not
> clear the cache every time.
> 
> Signed-off-by: Cai Huoqing <caihuoqing@...du.com>
> Reviewed-by: Wenpeng Liang <liangwenpeng@...wei.com>
> Tested-by: Wenpeng Liang <liangwenpeng@...wei.com>
> ---
>  drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 20 +++++---------------
>  1 file changed, 5 insertions(+), 15 deletions(-)

Applied to for-next, thanks

Jason