用dwn烧写内核，文件系统时候出错了

yaffs_read_super: isCheckpointed 0
VFS: Mounted root (yaffs filesystem) on device 31:2.
Freeing init memory: 188K
Start Qtopia-2.2.0
usbcore: registered new interface driver rt73usb
usbcore: registered new interface driver zd1211rw
initializing s3c2440 camera interface......
s3c2440 camif init done
Loading OV9650 driver.........
OV9650 address 0x60, manufacture ID 0xFFFF, expect 0x7FA2
OV9650 address 0x60, manufacture ID 0xFFFF, expect 0x7FA2
No OV9650 found!!!
Try to bring eth0 interface up ...
ifconfig eth0 hw ether 10:23:45:67:89:ab
eth0: link down
ifconfig eth0 192.168.1.6 netmask 255.255.255.0 up
add default gw 192.168.1.2
Done

我用的是tq2440

自己做的文件系统么？