igb: e1000_82575: Mark expected switch fall-through

In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.

Addresses-Coverity-ID: 114799 ("Missing break in switch")
Signed-off-by: Gustavo A. R. Silva <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

diff --git a/drivers/net/ethernet/intel/igb/e1000_82575.c b/drivers/net/ethernet/intel/igb/e1000_82575.c
index a795c07d0df77989956df489d5d16ec7e09b3ed7..bafdcf70a353d534b2c92fcc898b435f87ffa951 100644 (file)
--- a/drivers/net/ethernet/intel/igb/e1000_82575.c
+++ b/drivers/net/ethernet/intel/igb/e1000_82575.c
@@ -1708,6 +1708,7 @@ static s32 igb_setup_serdes_link_82575(struct e1000_hw *hw)
        case E1000_CTRL_EXT_LINK_MODE_1000BASE_KX:
                /* disable PCS autoneg and support parallel detect only */
                pcs_autoneg = false;
+               /* fall through */
        default:
                if (hw->mac.type == e1000_82575 ||
                    hw->mac.type == e1000_82576) {