Re: [PATCH 1/2] media: ipu3-cio2: Use dma_zalloc_coherent to replace dma_alloc_coherent + memset

[Bing Bu Cao <bingbu.cao@linux.intel.com>]

Hi, Jiang

This looks fine for me in ipu3-cio2.
Actually, we already have this change locally, but I think we miss submit it to community.
Thanks!

On 08/18/2018 11:16 PM, zhong jiang wrote:
> dma_zalloc_coherent has implemented the dma_alloc_coherent() + memset(),
> We prefer to dma_zalloc_coherent instead of open-codeing.
>
> Signed-off-by: zhong jiang <zhongjiang@huawei.com>
> ---
>  drivers/media/pci/intel/ipu3/ipu3-cio2.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/media/pci/intel/ipu3/ipu3-cio2.c b/drivers/media/pci/intel/ipu3/ipu3-cio2.c
> index 2902715..f0c6374 100644
> --- a/drivers/media/pci/intel/ipu3/ipu3-cio2.c
> +++ b/drivers/media/pci/intel/ipu3/ipu3-cio2.c
> @@ -218,13 +218,11 @@ static int cio2_fbpt_init(struct cio2_device *cio2, struct cio2_queue *q)
>  {
>  	struct device *dev = &cio2->pci_dev->dev;
>  
> -	q->fbpt = dma_alloc_coherent(dev, CIO2_FBPT_SIZE, &q->fbpt_bus_addr,
> -				     GFP_KERNEL);
> +	q->fbpt = dma_zalloc_coherent(dev, CIO2_FBPT_SIZE, &q->fbpt_bus_addr,
> +				      GFP_KERNEL);
>  	if (!q->fbpt)
>  		return -ENOMEM;
>  
> -	memset(q->fbpt, 0, CIO2_FBPT_SIZE);
> -
>  	return 0;
>  }
>