开发板一直和Linux ping不通

你好，自己移植的Linux内核，自己做的根文件系统，烧写到开发板之后与Linux  ping，失败！

重启系统之后enter，开发板终端出现下面的情况：（Linux已经设置好，都在同一个网段）

yaffs_read_super: isCheckpointed 0
VFS: Mounted root (yaffs filesystem) on device 31:2.
Freeing init memory: 112K
dm9000 dm9000.0: WARNING: no IRQ resource flags set.
eth0: link down

Please press Enter to activate this console. eth0: link up, 100Mbps, full-duplex, lpa 0x4DE1

Processing /etc/profile...
Done
[root@EmbedSky /]# ping 202.193.53.1
PING 202.193.53.1 (202.193.53.1): 56 data bytes
------------[ cut here ]------------
WARNING: at net/sched/sch_generic.c:246 dev_watchdog+0x258/0x278()
NETDEV WATCHDOG: eth0 (dm9000): transmit queue 0 timed out
Modules linked in:
[<c002aad4>] (unwind_backtrace+0x0/0xe8) from [<c0046238>] (warn_slowpath_common+0x44/0x78)
[<c0046238>] (warn_slowpath_common+0x44/0x78) from [<c00462a8>] (warn_slowpath_fmt+0x28/0x38)
[<c00462a8>] (warn_slowpath_fmt+0x28/0x38) from [<c0247854>] (dev_watchdog+0x258/0x278)
[<c0247854>] (dev_watchdog+0x258/0x278) from [<c004fb0c>] (run_timer_softirq+0x198/0x218)
[<c004fb0c>] (run_timer_softirq+0x198/0x218) from [<c004b11c>] (__do_softirq+0x88/0x118)
[<c004b11c>] (__do_softirq+0x88/0x118) from [<c0024040>] (_text+0x40/0x84)
[<c0024040>] (_text+0x40/0x84) from [<c0024a44>] (__irq_svc+0x24/0xa0)
Exception stack(0xc0393f78 to 0xc0393fc0)
3f60:                                                       f4100000 00000032
3f80: f4100000 60000013 c0392000 c03b3124 c0395bf0 c0395be8 3001f210 41129200
3fa0: 3001f1a8 00000000 00000000 c0393fc0 c00263fc c0025ebc 60000013 ffffffff
[<c0024a44>] (__irq_svc+0x24/0xa0) from [<c0025ebc>] (default_idle+0x88/0x94)
[<c0025ebc>] (default_idle+0x88/0x94) from [<c00263fc>] (cpu_idle+0x70/0xa8)
[<c00263fc>] (cpu_idle+0x70/0xa8) from [<c0008a9c>] (start_kernel+0x1e8/0x25c)
[<c0008a9c>] (start_kernel+0x1e8/0x25c) from [<30008034>] (0x30008034)
---[ end trace 66923b0018b8f740 ]---