Re: [dpdk-dev] [PATCH] lib/librte_pmd_i40e: i40e vlan filter set fix

["Xie, Huawei" <huawei.xie@intel.com>]

Thomas, comments for this patch?

> -----Original Message-----
> From: Xie, Huawei
> Sent: Saturday, September 27, 2014 10:49 PM
> To: dev@dpdk.org
> Cc: Xie, Huawei; Chen, Jing D; Zhang, Helin
> Subject: [PATCH] lib/librte_pmd_i40e: i40e vlan filter set fix
> 
> the right shift bits should be 5 rather than 4.
>     vid_idx = (uint32_t) ((vlan_id >> 5 ) & 0x7F)
> 
> Signed-off-by: Huawei Xie <huawei.xie@intel.com>
> CC: Jing Chen <jing.d.chen@intel.com>
> CC: Helin Zhang <helin.zhang@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 9009bd4..9c9d831 100644
> --- a/lib/librte_pmd_i40e/i40e_ethdev.c
> +++ b/lib/librte_pmd_i40e/i40e_ethdev.c
> @@ -3786,14 +3786,11 @@ 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