s32 ixgbe_negotiate_fc(struct ixgbe_hw *hw, u32 adv_reg, u32 lp_reg,
		       u32 adv_sym, u32 adv_asm, u32 lp_sym, u32 lp_asm)
int ixgbe_negotiate_fc(struct ixgbe_hw *hw, u32 adv_reg, u32 lp_reg,
		       u32 adv_sym, u32 adv_asm, u32 lp_sym, u32 lp_asm)