RE: [PATCH v2] ntb: ntb_hw_intel: Skylake doorbells should be 32bits, not 64bits

["Allen Hubbe" <Allen.Hubbe@dell.com>]

From: Dave Jiang 
> Fixing doorbell register length to 32bits per spec. On Skylake NTB, the
> doorbell registers are 32bit write only registers. The source for the doorbell is
> a 64bit register that shows the interrupt bits.
> 
> Signed-off-by: Dave Jiang <dave.jiang@intel.com>

Acked-by: Allen Hubbe <Allen.Hubbe@dell.com>

> ---
> 
> v2: Allen: remove unnecessary change to code.
> 
>  drivers/ntb/hw/intel/ntb_hw_intel.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/ntb/hw/intel/ntb_hw_intel.c
> b/drivers/ntb/hw/intel/ntb_hw_intel.c
> index c002384..7b3b6fd 100644
> --- a/drivers/ntb/hw/intel/ntb_hw_intel.c
> +++ b/drivers/ntb/hw/intel/ntb_hw_intel.c
> @@ -2878,7 +2878,7 @@ static const struct intel_ntb_reg skx_reg = {
>  	.link_is_up		= xeon_link_is_up,
>  	.db_ioread		= skx_db_ioread,
>  	.db_iowrite		= skx_db_iowrite,
> -	.db_size		= sizeof(u64),
> +	.db_size		= sizeof(u32),
>  	.ntb_ctl		= SKX_NTBCNTL_OFFSET,
>  	.mw_bar			= {2, 4},
>  };