[PATCH 1/1] nvme: use macro definitions for setting reservation values

[Sagi Grimberg]

> This makes the code more readable.

I find it readable as it is. But I don't particularly
care about it all that much.

> Signed-off-by: Max Gurtovoy <mgurtovoy at nvidia.com>
> ---
>   drivers/nvme/host/core.c | 12 ++++++------
>   include/linux/nvme.h     | 12 ++++++++++++
>   2 files changed, 18 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
> index 3f1a7dc2a2a3..50668e1bd9f1 100644
> --- a/drivers/nvme/host/core.c
> +++ b/drivers/nvme/host/core.c
> @@ -2068,17 +2068,17 @@ static char nvme_pr_type(enum pr_type type)
>   {
>   	switch (type) {
>   	case PR_WRITE_EXCLUSIVE:
> -		return 1;
> +		return NVME_PR_WRITE_EXCLUSIVE;
>   	case PR_EXCLUSIVE_ACCESS:
> -		return 2;
> +		return NVME_PR_EXCLUSIVE_ACCESS;
>   	case PR_WRITE_EXCLUSIVE_REG_ONLY:
> -		return 3;
> +		return NVME_PR_WRITE_EXCLUSIVE_REG_ONLY;
>   	case PR_EXCLUSIVE_ACCESS_REG_ONLY:
> -		return 4;
> +		return NVME_PR_EXCLUSIVE_ACCESS_REG_ONLY;
>   	case PR_WRITE_EXCLUSIVE_ALL_REGS:
> -		return 5;
> +		return NVME_PR_WRITE_EXCLUSIVE_ALL_REGS;
>   	case PR_EXCLUSIVE_ACCESS_ALL_REGS:
> -		return 6;
> +		return NVME_PR_EXCLUSIVE_ACCESS_ALL_REGS;
>   	default:
>   		return 0;
>   	}
> diff --git a/include/linux/nvme.h b/include/linux/nvme.h
> index ae53d74f3696..a925be0056f2 100644
> --- a/include/linux/nvme.h
> +++ b/include/linux/nvme.h
> @@ -238,6 +238,18 @@ enum {
>   	NVME_CAP_CRMS_CRIMS	= 1ULL << 60,
>   };
>   
> +/*
> + * Reservation Type Encoding
> + */
> +enum {
> +	NVME_PR_WRITE_EXCLUSIVE = 1, /* Write Exclusive Reservation */
> +	NVME_PR_EXCLUSIVE_ACCESS = 2, /* Exclusive Access Reservation */
> +	NVME_PR_WRITE_EXCLUSIVE_REG_ONLY = 3, /* Write Exclusive - Registrants Only Reservation */
> +	NVME_PR_EXCLUSIVE_ACCESS_REG_ONLY = 4, /* Exclusive Access - Registrants Only Reservation */
> +	NVME_PR_WRITE_EXCLUSIVE_ALL_REGS = 5, /* Write Exclusive - All Registrants Reservation */
> +	NVME_PR_EXCLUSIVE_ACCESS_ALL_REGS = 6, /* Exclusive Access - All Registrants Reservation */

The comments are unneeded, the enums themselves are
self-explanatory (and also mirror the pr_type enums themselves).