linux-kernel - Re: [PATCH] ACPI: NFIT: add helper to_nfit_mem() to take device to nfit

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Date:   Wed, 5 Jul 2023 11:43:42 -0700
From:   Dave Jiang <dave.jiang@...el.com>
To:     Ben Dooks <ben.dooks@...ethink.co.uk>, <nvdimm@...ts.linux.dev>
CC:     <linux-acpi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <lenb@...nel.org>
Subject: Re: [PATCH] ACPI: NFIT: add helper to_nfit_mem() to take device to
 nfit_mem



On 7/3/23 06:17, Ben Dooks wrote:
> Add a quick helper to just do struct device to the struct nfit_mem
> field it should be referencing. This reduces the number of code
> lines in some of the followgn code as it removes the intermediate

s/followgn/following/

> struct nvdimm.
> 
> Signed-off-by: Ben Dooks <ben.dooks@...ethink.co.uk>

Reviewed-by: Dave Jiang <dave.jiang@...el.com>
> ---
>   drivers/acpi/nfit/core.c | 27 +++++++++++++--------------
>   1 file changed, 13 insertions(+), 14 deletions(-)
> 
> diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c
> index 0fcc247fdfac..9213b426b125 100644
> --- a/drivers/acpi/nfit/core.c
> +++ b/drivers/acpi/nfit/core.c
> @@ -1361,18 +1361,22 @@ static const struct attribute_group *acpi_nfit_attribute_groups[] = {
>   	NULL,
>   };
>   
> -static struct acpi_nfit_memory_map *to_nfit_memdev(struct device *dev)
> +static struct nfit_mem *to_nfit_mem(struct device *dev)
>   {
>   	struct nvdimm *nvdimm = to_nvdimm(dev);
> -	struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
> +	return  nvdimm_provider_data(nvdimm);
> +}
> +
> +static struct acpi_nfit_memory_map *to_nfit_memdev(struct device *dev)
> +{
> +	struct nfit_mem *nfit_mem = to_nfit_mem(dev);
>   
>   	return __to_nfit_memdev(nfit_mem);
>   }
>   
>   static struct acpi_nfit_control_region *to_nfit_dcr(struct device *dev)
>   {
> -	struct nvdimm *nvdimm = to_nvdimm(dev);
> -	struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
> +	struct nfit_mem *nfit_mem = to_nfit_mem(dev);
>   
>   	return nfit_mem->dcr;
>   }
> @@ -1531,8 +1535,7 @@ static DEVICE_ATTR_RO(serial);
>   static ssize_t family_show(struct device *dev,
>   		struct device_attribute *attr, char *buf)
>   {
> -	struct nvdimm *nvdimm = to_nvdimm(dev);
> -	struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
> +	struct nfit_mem *nfit_mem = to_nfit_mem(dev);
>   
>   	if (nfit_mem->family < 0)
>   		return -ENXIO;
> @@ -1543,8 +1546,7 @@ static DEVICE_ATTR_RO(family);
>   static ssize_t dsm_mask_show(struct device *dev,
>   		struct device_attribute *attr, char *buf)
>   {
> -	struct nvdimm *nvdimm = to_nvdimm(dev);
> -	struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
> +	struct nfit_mem *nfit_mem = to_nfit_mem(dev);
>   
>   	if (nfit_mem->family < 0)
>   		return -ENXIO;
> @@ -1555,8 +1557,7 @@ static DEVICE_ATTR_RO(dsm_mask);
>   static ssize_t flags_show(struct device *dev,
>   		struct device_attribute *attr, char *buf)
>   {
> -	struct nvdimm *nvdimm = to_nvdimm(dev);
> -	struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
> +	struct nfit_mem *nfit_mem = to_nfit_mem(dev);
>   	u16 flags = __to_nfit_memdev(nfit_mem)->flags;
>   
>   	if (test_bit(NFIT_MEM_DIRTY, &nfit_mem->flags))
> @@ -1576,8 +1577,7 @@ static DEVICE_ATTR_RO(flags);
>   static ssize_t id_show(struct device *dev,
>   		struct device_attribute *attr, char *buf)
>   {
> -	struct nvdimm *nvdimm = to_nvdimm(dev);
> -	struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
> +	struct nfit_mem *nfit_mem = to_nfit_mem(dev);
>   
>   	return sprintf(buf, "%s\n", nfit_mem->id);
>   }
> @@ -1586,8 +1586,7 @@ static DEVICE_ATTR_RO(id);
>   static ssize_t dirty_shutdown_show(struct device *dev,
>   		struct device_attribute *attr, char *buf)
>   {
> -	struct nvdimm *nvdimm = to_nvdimm(dev);
> -	struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
> +	struct nfit_mem *nfit_mem = to_nfit_mem(dev);
>   
>   	return sprintf(buf, "%d\n", nfit_mem->dirty_shutdown);
>   }