运行socket程序一段时间后，出现这样的错误，已经改了很多种方法，仍然不能避免。
[ 2524.010000] ------------[ cut here ]------------
[ 2524.010000] WARNING: at net/sched/sch_generic.c:255 dev_watchdog+0x278/0x29c()
[ 2524.010000] NETDEV WATCHDOG: eth0 (dm9620): transmit queue 0 timed out
[ 2524.010000] Modules linked in: libertas_sdio(O) libertas(O) zd1211rw(O) rt2800usb(O) rt2800lib(O) rt73usb(O) rt2x00usb(O) rt2x00lib(O) ath9k_htc(O) mac80211(O) ath9k_common(O) ath9k_hw(O) ath(O) cfg80211(O) compat(O) rtl8192cu(O)
[ 2524.025000] [<c001aa44>] (unwind_backtrace+0x0/0xf0) from [<c0030558>] (warn_slowpath_common+0x4c/0x64)
[ 2524.035000] [<c0030558>] (warn_slowpath_common+0x4c/0x64) from [<c0030604>] (warn_slowpath_fmt+0x30/0x40)
[ 2524.045000] [<c0030604>] (warn_slowpath_fmt+0x30/0x40) from [<c04dbe40>] (dev_watchdog+0x278/0x29c)
[ 2524.050000] [<c04dbe40>] (dev_watchdog+0x278/0x29c) from [<c003f480>] (run_timer_softirq+0x130/0x388)
[ 2524.060000] [<c003f480>] (run_timer_softirq+0x130/0x388) from [<c003869c>] (__do_softirq+0xc0/0x224)
[ 2524.070000] [<c003869c>] (__do_softirq+0xc0/0x224) from [<c0038c80>] (irq_exit+0x90/0x98)
[ 2524.080000] [<c0038c80>] (irq_exit+0x90/0x98) from [<c00148fc>] (handle_IRQ+0x50/0xac)
[ 2524.085000] [<c00148fc>] (handle_IRQ+0x50/0xac) from [<c00084e8>] (gic_handle_irq+0x34/0x68)
[ 2524.095000] [<c00084e8>] (gic_handle_irq+0x34/0x68) from [<c0013600>] (__irq_svc+0x40/0x70)
[ 2524.105000] Exception stack(0xc08d7f08 to 0xc08d7f50)
[ 2524.110000] 7f00: c08d7f50 0000024b aab836f3 0000024b aab6fa0e 0000024b
[ 2524.115000] 7f20: c1a00358 c08d7f50 00000000 c09065fc 00000000 c09879ac 3b9aca00 c08d7f50
[ 2524.125000] 7f40: c0071cc4 c04520b4 90000013 ffffffff
[ 2524.130000] [<c0013600>] (__irq_svc+0x40/0x70) from [<c04520b4>] (cpuidle_wrap_enter+0x4c/0xa0)
[ 2524.140000] [<c04520b4>] (cpuidle_wrap_enter+0x4c/0xa0) from [<c0451cdc>] (cpuidle_idle_call+0xdc/0x360)
[ 2524.150000] [<c0451cdc>] (cpuidle_idle_call+0xdc/0x360) from [<c0014f84>] (cpu_idle+0xc8/0x11c)
[ 2524.155000] [<c0014f84>] (cpu_idle+0xc8/0x11c) from [<c089f7c8>] (start_kernel+0x2cc/0x320)
[ 2524.165000] ---[ end trace ec83284d2e7f08e5 ]---
