ixgbe: Reduce VT code indent in set_vfta by introducing jump label

In order to clear the way for upcoming work I thought it best to drop the
level of indent in the ixgbe_set_vfta_generic function.  Most of the code
is held in the virtualization specific section.  So the easiest approach is
to just add a jump label and jump past the bulk of the code if it is not
enabled.

Signed-off-by: Alexander Duyck <aduyck@mirantis.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_common.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_common.c
index 027c1ad..f608973 100644 (file)
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_common.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_common.c
@@ -3051,8 +3051,8 @@ s32 ixgbe_set_vfta_generic(struct ixgbe_hw *hw, u32 vlan, u32 vind,
                           bool vlan_on)
 {
        u32 regidx, vfta_delta, vfta;
+       s32 vlvf_index;
        u32 bits;
-       u32 vt;
 
        if (vlan > 4095)
                return IXGBE_ERR_PARAM;
@@ -3088,83 +3088,81 @@ s32 ixgbe_set_vfta_generic(struct ixgbe_hw *hw, u32 vlan, u32 vind,
         *   Or !vlan_on
         *     clear the pool bit and possibly the vind
         */
-       vt = IXGBE_READ_REG(hw, IXGBE_VT_CTL);
-       if (vt & IXGBE_VT_CTL_VT_ENABLE) {
-               s32 vlvf_index;
-
-               vlvf_index = ixgbe_find_vlvf_slot(hw, vlan);
-               if (vlvf_index < 0)
-                       return vlvf_index;
-
-               if (vlan_on) {
-                       /* set the pool bit */
-                       if (vind < 32) {
-                               bits = IXGBE_READ_REG(hw,
-                                               IXGBE_VLVFB(vlvf_index*2));
-                               bits |= (1 << vind);
-                               IXGBE_WRITE_REG(hw,
-                                               IXGBE_VLVFB(vlvf_index*2),
-                                               bits);
-                       } else {
-                               bits = IXGBE_READ_REG(hw,
-                                               IXGBE_VLVFB((vlvf_index*2)+1));
-                               bits |= (1 << (vind-32));
-                               IXGBE_WRITE_REG(hw,
-                                               IXGBE_VLVFB((vlvf_index*2)+1),
-                                               bits);
-                       }
+       if (!(IXGBE_READ_REG(hw, IXGBE_VT_CTL) & IXGBE_VT_CTL_VT_ENABLE))
+               goto vfta_update;
+
+       vlvf_index = ixgbe_find_vlvf_slot(hw, vlan);
+       if (vlvf_index < 0)
+               return vlvf_index;
+
+       if (vlan_on) {
+               /* set the pool bit */
+               if (vind < 32) {
+                       bits = IXGBE_READ_REG(hw,
+                                       IXGBE_VLVFB(vlvf_index*2));
+                       bits |= (1 << vind);
+                       IXGBE_WRITE_REG(hw,
+                                       IXGBE_VLVFB(vlvf_index*2),
+                                       bits);
                } else {
-                       /* clear the pool bit */
-                       if (vind < 32) {
-                               bits = IXGBE_READ_REG(hw,
-                                               IXGBE_VLVFB(vlvf_index*2));
-                               bits &= ~(1 << vind);
-                               IXGBE_WRITE_REG(hw,
-                                               IXGBE_VLVFB(vlvf_index*2),
-                                               bits);
-                               bits |= IXGBE_READ_REG(hw,
-                                               IXGBE_VLVFB((vlvf_index*2)+1));
-                       } else {
-                               bits = IXGBE_READ_REG(hw,
-                                               IXGBE_VLVFB((vlvf_index*2)+1));
-                               bits &= ~(1 << (vind-32));
-                               IXGBE_WRITE_REG(hw,
-                                               IXGBE_VLVFB((vlvf_index*2)+1),
-                                               bits);
-                               bits |= IXGBE_READ_REG(hw,
-                                               IXGBE_VLVFB(vlvf_index*2));
-                       }
+                       bits = IXGBE_READ_REG(hw,
+                                       IXGBE_VLVFB((vlvf_index*2)+1));
+                       bits |= (1 << (vind-32));
+                       IXGBE_WRITE_REG(hw,
+                                       IXGBE_VLVFB((vlvf_index*2)+1),
+                                       bits);
                }
-
-               /*
-                * If there are still bits set in the VLVFB registers
-                * for the VLAN ID indicated we need to see if the
-                * caller is requesting that we clear the VFTA entry bit.
-                * If the caller has requested that we clear the VFTA
-                * entry bit but there are still pools/VFs using this VLAN
-                * ID entry then ignore the request.  We're not worried
-                * about the case where we're turning the VFTA VLAN ID
-                * entry bit on, only when requested to turn it off as
-                * there may be multiple pools and/or VFs using the
-                * VLAN ID entry.  In that case we cannot clear the
-                * VFTA bit until all pools/VFs using that VLAN ID have also
-                * been cleared.  This will be indicated by "bits" being
-                * zero.
-                */
-               if (bits) {
-                       IXGBE_WRITE_REG(hw, IXGBE_VLVF(vlvf_index),
-                                       (IXGBE_VLVF_VIEN | vlan));
-
-                       /* if someone wants to clear the vfta entry but
-                        * some pools/VFs are still using it.  Ignore it.
-                        */
-                       if (!vlan_on)
-                               vfta_delta = 0;
+       } else {
+               /* clear the pool bit */
+               if (vind < 32) {
+                       bits = IXGBE_READ_REG(hw,
+                                       IXGBE_VLVFB(vlvf_index*2));
+                       bits &= ~(1 << vind);
+                       IXGBE_WRITE_REG(hw,
+                                       IXGBE_VLVFB(vlvf_index*2),
+                                       bits);
+                       bits |= IXGBE_READ_REG(hw,
+                                       IXGBE_VLVFB((vlvf_index*2)+1));
                } else {
-                       IXGBE_WRITE_REG(hw, IXGBE_VLVF(vlvf_index), 0);
+                       bits = IXGBE_READ_REG(hw,
+                                       IXGBE_VLVFB((vlvf_index*2)+1));
+                       bits &= ~(1 << (vind-32));
+                       IXGBE_WRITE_REG(hw,
+                                       IXGBE_VLVFB((vlvf_index*2)+1),
+                                       bits);
+                       bits |= IXGBE_READ_REG(hw,
+                                       IXGBE_VLVFB(vlvf_index*2));
                }
        }
 
+       /* If there are still bits set in the VLVFB registers
+        * for the VLAN ID indicated we need to see if the
+        * caller is requesting that we clear the VFTA entry bit.
+        * If the caller has requested that we clear the VFTA
+        * entry bit but there are still pools/VFs using this VLAN
+        * ID entry then ignore the request.  We're not worried
+        * about the case where we're turning the VFTA VLAN ID
+        * entry bit on, only when requested to turn it off as
+        * there may be multiple pools and/or VFs using the
+        * VLAN ID entry.  In that case we cannot clear the
+        * VFTA bit until all pools/VFs using that VLAN ID have also
+        * been cleared.  This will be indicated by "bits" being
+        * zero.
+        */
+       if (bits) {
+               IXGBE_WRITE_REG(hw, IXGBE_VLVF(vlvf_index),
+                               (IXGBE_VLVF_VIEN | vlan));
+
+               /* if someone wants to clear the vfta entry but
+                * some pools/VFs are still using it.  Ignore it.
+                */
+               if (!vlan_on)
+                       vfta_delta = 0;
+       } else {
+               IXGBE_WRITE_REG(hw, IXGBE_VLVF(vlvf_index), 0);
+       }
+
+vfta_update:
        if (vfta_delta)
                IXGBE_WRITE_REG(hw, IXGBE_VFTA(regidx), vfta);