Comment 11 for bug 1607079

In my case the workaround works.
It is not the whole device ccmni0 blocked - only transmission with a huge number of errors:

/var/log/syslog:
.
Aug 3 17:42:06 ubuntu-phablet kernel: [43904.216292][ccci/net] (1)CCMNI0 TX busy and stop queue: q_idx=32, skb->len=70
Aug 3 17:42:06 ubuntu-phablet kernel: [43904.216326][ccci/net] (1) TX read_out = 0 avai_out = 32 avai_in = 32
Aug 3 17:42:06 ubuntu-phablet kernel: [43904.216352][ccci/net] (1) RX read_out = 0 avai_out = 0 avai_in = 99
.
[Repeating serveral times]
.

Output of ifconfig:

ccmni0 Link encap:Ethernet Hardware Adresse c2:75:ba:b8:fd:3e
          inet Adresse:10.79.248.38 Maske:255.255.255.0
          UP RUNNING NOARP MTU:1500 Metrik:1
          RX-Pakete:21543 Fehler:0 Verloren:0 Überläufe:0 Fenster:0
          TX-Pakete:17009 Fehler:8017 Verloren:0 Überläufe:0 Träger:0
          Kollisionen:0 Sendewarteschlangenlänge:1000
          RX-Bytes:15643461 (15.6 MB) TX-Bytes:1860544 (1.8 MB)
.

(massive transmission errors: "Fehler:8017")