Server hangs or loses network connectivity with "[bnx2x_attn_int_deasserted2:2096(ethX)]FATAL HW block attention set2 0x20" in the logs.

Issue

• Broadcom interfaces utilizing the bnx2x driver may go offline entirely, or the system may hang or crash.
• The following messages appear in logs:

        kernel: [bnx2x_attn_int_deasserted2:2096(eth3)]FATAL HW block attention set2 0x20
        kernel: [bnx2x_attn_int_deasserted2:2097(eth3)]driver assert
        kernel: [bnx2x_panic_dump:539(eth3)]begin crash dump -----------------
        kernel: [bnx2x_panic_dump:547(eth3)]def_c_idx(0x204f) def_u_idx(0x0) def_x_idx(0x0)
        def_t_idx(0x0) def_att_idx(0x4) attn_state(0x1)  spq_prod_idx(0x5f)
        kernel: [bnx2x_panic_dump:558(eth3)]fp0:rx_bd_prod(0x121e) rx_bd_cons(0x220)
        *rx_bd_cons_sb(0x0) rx_comp_prod(0x1224) rx_comp_cons(0x224)  *rx_cons_sb(0x224)