Re: [PATCH v4 15/28] cxl/region: Refactor common create region code

[Fan Ni <nifan.cxl@gmail.com>]

On Mon, Oct 07, 2024 at 06:16:21PM -0500, Ira Weiny wrote:
> create_pmem_region_store() and create_ram_region_store() are identical
> with the exception of the region mode.  With the addition of DC region
> mode this would end up being 3 copies of the same code.
> 
> Refactor create_pmem_region_store() and create_ram_region_store() to use
> a single common function to be used in subsequent DC code.
> 
> Suggested-by: Fan Ni <fan.ni@samsung.com>
> Signed-off-by: Ira Weiny <ira.weiny@intel.com>
> ---

Reviewed-by: Fan Ni <fan.ni@samsung.com>

>  drivers/cxl/core/region.c | 28 +++++++++++-----------------
>  1 file changed, 11 insertions(+), 17 deletions(-)
> 
> diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c
> index ab00203f285a..2ca6148d108c 100644
> --- a/drivers/cxl/core/region.c
> +++ b/drivers/cxl/core/region.c
> @@ -2552,9 +2552,8 @@ static struct cxl_region *__create_region(struct cxl_root_decoder *cxlrd,
>  	return devm_cxl_add_region(cxlrd, id, mode, CXL_DECODER_HOSTONLYMEM);
>  }
>  
> -static ssize_t create_pmem_region_store(struct device *dev,
> -					struct device_attribute *attr,
> -					const char *buf, size_t len)
> +static ssize_t create_region_store(struct device *dev, const char *buf,
> +				   size_t len, enum cxl_region_mode mode)
>  {
>  	struct cxl_root_decoder *cxlrd = to_cxl_root_decoder(dev);
>  	struct cxl_region *cxlr;
> @@ -2564,31 +2563,26 @@ static ssize_t create_pmem_region_store(struct device *dev,
>  	if (rc != 1)
>  		return -EINVAL;
>  
> -	cxlr = __create_region(cxlrd, CXL_REGION_PMEM, id);
> +	cxlr = __create_region(cxlrd, mode, id);
>  	if (IS_ERR(cxlr))
>  		return PTR_ERR(cxlr);
>  
>  	return len;
>  }
> +
> +static ssize_t create_pmem_region_store(struct device *dev,
> +					struct device_attribute *attr,
> +					const char *buf, size_t len)
> +{
> +	return create_region_store(dev, buf, len, CXL_REGION_PMEM);
> +}
>  DEVICE_ATTR_RW(create_pmem_region);
>  
>  static ssize_t create_ram_region_store(struct device *dev,
>  				       struct device_attribute *attr,
>  				       const char *buf, size_t len)
>  {
> -	struct cxl_root_decoder *cxlrd = to_cxl_root_decoder(dev);
> -	struct cxl_region *cxlr;
> -	int rc, id;
> -
> -	rc = sscanf(buf, "region%d\n", &id);
> -	if (rc != 1)
> -		return -EINVAL;
> -
> -	cxlr = __create_region(cxlrd, CXL_REGION_RAM, id);
> -	if (IS_ERR(cxlr))
> -		return PTR_ERR(cxlr);
> -
> -	return len;
> +	return create_region_store(dev, buf, len, CXL_REGION_RAM);
>  }
>  DEVICE_ATTR_RW(create_ram_region);
>  
> 
> -- 
> 2.46.0
> 

-- 
Fan Ni