Re: [dpdk-dev] [PATCH v3 1/2] lib/librte_pmd_i40e: set vlan id filter fix

[Bruce Richardson <bruce.richardson@intel.com>]

On Tue, Nov 25, 2014 at 03:28:56PM +0800, Huawei Xie wrote:
> ">> 5" rather than ">> 4"

you need to provide a reference for where this value comes from. Presumably
this is based of the register description in the datasheet for the NIC, so perhaps
you can add that.

> 
> Signed-off-by: Huawei Xie <huawei.xie@intel.com>
> ---
>  lib/librte_pmd_i40e/i40e_ethdev.c | 7 ++-----
>  1 file changed, 2 insertions(+), 5 deletions(-)
> 
> diff --git a/lib/librte_pmd_i40e/i40e_ethdev.c b/lib/librte_pmd_i40e/i40e_ethdev.c
> index dacf2db..518597f 100644
> --- a/lib/librte_pmd_i40e/i40e_ethdev.c
> +++ b/lib/librte_pmd_i40e/i40e_ethdev.c
> @@ -4172,14 +4172,11 @@ i40e_set_vlan_filter(struct i40e_vsi *vsi,
>  {
>  	uint32_t vid_idx, vid_bit;
>  
> -#define UINT32_BIT_MASK      0x1F
> -#define VALID_VLAN_BIT_MASK  0xFFF
>  	/* VFTA is 32-bits size array, each element contains 32 vlan bits, Find the
>  	 *  element first, then find the bits it belongs to
>  	 */
> -	vid_idx = (uint32_t) ((vlan_id & VALID_VLAN_BIT_MASK) >>
> -		  sizeof(uint32_t));
> -	vid_bit = (uint32_t) (1 << (vlan_id & UINT32_BIT_MASK));
> +	vid_idx = (uint32_t) ((vlan_id >> 5) & 0x7F);
> +	vid_bit = (uint32_t) (1 << (vlan_id & 0x1F));
>  
>  	if (on)
>  		vsi->vfta[vid_idx] |= vid_bit;
> -- 
> 1.8.1.4
>