This bug has been copied from bug #576709 and has been proposed to be backported to 5.4 z-stream (EUS).
Please cancel this request for 5.4.z. From Cisco: Hi Andrius, The fnic tx_flush bug fix is applicable only to 5.5 kernel. The 5.4 kernel does not have FIP support, and this bug crept in when we added FIP support in the 5.5 in-box driver. Thanks -- abhijeet