NETDEV WATCHDOG: internal(r8152): transmit queue 0 timed out

[sean darcy]

I've got F20 on an old laptop I'm using as a router. The external 
interface uses the RJ45 port. The internal uses a USB ethernet adapter. 
Every 2-3 weeks, the internal USB adapter fails. I can fix it by just 
moving it to the other USB port. In another 2-3 weeks, it will fail 
again, and I move it back to the original USB port, and so on.

No problems with the external RJ45 interface.

The logs aren't very helpful:

12:39:22 kernel: NETDEV WATCHDOG: internal (r8152): transmit queue 0 
timed out
12:39:22 kernel: Modules linked in: xt_conntrack xt_nat ipt_MASQUERADE 
xt_DSCP iptable_mangle iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 
nf_nat_ipv4 iptable_raw sch_pie nf_nat_sip nf_nat nf_conntrack_sip 
nf_conntrack bnep bluetooth arc4 snd_hda_codec_hdmi 
snd_hda_codec_realtek b43 bcma snd_hda_codec_generic snd_hda_intel 
snd_hda_controller mac80211 snd_hda_codec uvcvideo snd_hwdep snd_seq 
snd_seq_device coretemp sdhci_pci snd_pcm acer_wmi videobuf2_vmalloc 
cfg80211 sparse_keymap microcode sdhci videobuf2_memops iTCO_wdt 
videobuf2_core rfkill iTCO_vendor_support v4l2_common tg3 ssb cdc_ether 
ptp joydev pps_core usbnet videodev media i2c_i801 serio_raw mmc_core 
irda r8152 lpc_ich shpchp tifm_7xx1 snd_timer snd soundcore mfd_core 
tifm_core crc_ccitt wmi mii acpi_cpufreq firewire_ohci firewire_core 
crc_itu_t
12:39:22 kernel: r8152 2-2:1.0 internal: Tx timeout
12:39:23 kernel: r8152 2-2:1.0 internal: Tx timeout
12:39:24 kernel: r8152 2-2:1.0 internal: Tx timeout
......

This looks like a USB problem. Is there a way to get usb (or 
NetworkManager) to reinitialize the driver when this happens?

sean