i40e: fix vlan filtering

">> 5" rather than ">> 4"

vlan id is a 12 bit value.
VFTA is 128 x 32 bit array (128 double word array) which could store 2^12 vlan bits.
Each bit represents whether corresponding vlan tag is set in the VSI.
Use high 7 bits as the index for the double word array.

Signed-off-by: Huawei Xie <huawei.xie@intel.com>
Acked-by: Helin Zhang <helin.zhang@intel.com>
Acked-by: Jing Chen <jing.d.chen@intel.com>

diff --git a/lib/librte_pmd_i40e/i40e_ethdev.c b/lib/librte_pmd_i40e/i40e_ethdev.c
index 002d4a9..1787611 100644 (file)
--- a/lib/librte_pmd_i40e/i40e_ethdev.c
+++ b/lib/librte_pmd_i40e/i40e_ethdev.c
@@ -4183,14 +4183,11 @@ 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;