iwl4965 Wifi Microcode SW error detected

Ever since I installed Xubuntu 16.04, these error messages appear from time to time on syslog. It doesn't happen very often but I'd like to know if there's a fix for that.

Thank you!

iwl4965 0000:03:00.0: Microcode SW error detected.  Restarting 0x82000000.
iwl4965 0000:03:00.0: Loaded firmware version: 228.61.2.24
iwl4965 0000:03:00.0: Start IWL Error Log Dump:
iwl4965 0000:03:00.0: Status: 0x0002B3E4, count: 5
iwl4965 0000:03:00.0: Desc                                  Time       data1      data2      line
iwl4965 0000:03:00.0: NMI_INTERRUPT_WDG            (0x0004) 3043856388 0x00000002 0x02430000 208
iwl4965 0000:03:00.0: pc      blink1  blink2  ilink1  ilink2  hcmd
iwl4965 0000:03:00.0: 0x0046C 0x02F3E 0x004C2 0x006DE 0x02FAA 0x0001C
iwl4965 0000:03:00.0: FH register values:
iwl4965 0000:03:00.0:       FH49_RSCSR_CHNL0_STTS_WPTR_REG: 0X0341b800
iwl4965 0000:03:00.0:      FH49_RSCSR_CHNL0_RBDCB_BASE_REG: 0X00340c90
iwl4965 0000:03:00.0:                FH49_RSCSR_CHNL0_WPTR: 0X000000b0
iwl4965 0000:03:00.0:       FH49_MEM_RCSR_CHNL0_CONFIG_REG: 0X80809000
iwl4965 0000:03:00.0:        FH49_MEM_RSSR_SHARED_CTRL_REG: 0X0000003c
iwl4965 0000:03:00.0:          FH49_MEM_RSSR_RX_STATUS_REG: 0X02430000
iwl4965 0000:03:00.0:   FH49_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV: 0X00000000
iwl4965 0000:03:00.0:              FH49_TSSR_TX_STATUS_REG: 0X07ff0002
iwl4965 0000:03:00.0:               FH49_TSSR_TX_ERROR_REG: 0X00000000
iwl4965 0000:03:00.0: Can't stop Rx DMA.
ieee80211 phy0: Hardware restart was requested

Wifi adapter details:

03:00.0 Network controller: Intel Corporation PRO/Wireless 4965 AG or AGN [Kedron] Network Connection (rev 61)
    Subsystem: Intel Corporation Lenovo ThinkPad T61
    Kernel driver in use: iwl4965
    Kernel modules: iwl4965

Up to this date, I have found no answer to this issue. Can anybody help?