Re: [PATCH v3 12/25] cxl/region: Refactor common create region code

[Jonathan Cameron <Jonathan.Cameron@Huawei.com>]

On Fri, 16 Aug 2024 09:44:20 -0500
Ira Weiny <ira.weiny@intel.com> 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>

Make sense

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.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 650fe33f2ed4..f85b26b39b2f 100644
> --- a/drivers/cxl/core/region.c
> +++ b/drivers/cxl/core/region.c
> @@ -2553,9 +2553,8 @@ 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;
> @@ -2565,31 +2564,26 @@ 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);
>  
>