Would you be able to copy the output and paste it in a code block here so that I can read the error messages more easily?
this the error
ar7240> setenv bootargs board=DJI-WM305 console=ttyS0,115200
ar7240> root=/dev/mtdblock5 init=/sbin/init mtdparts=athnor0:256k@0k(u-boot),64k@256k(u-bootenv),896k@320k(kernel1),3008k@1216k(rootfs1),896k@4224k(kernel2),3008k@5120k(rootfs2),64k@8128k(art),3904k@320k(firmware1),3904k@4224k(firmware2),8192k@0k(all)
ar7240> bootm 0x9f420000
## Booting image at 9f420000 ...
Image Name: MIPS OpenWrt Linux-3.10.49
Created: 2015-12-01 9:06:21 UTC
Image Type: MIPS Linux Kernel Image (lzma compressed)
Data Size: 905249 Bytes = 884 kB
Load Address: 80060000
Entry Point: 80060000
Verifying Checksum at 0x9f420040 ...OK
Uncompressing Kernel Image ... OK
Starting kernel ...
[ 0.000000] Linux version 3.10.49 (yello@ubuntu) (gcc version 4.8.3 (OpenWrt/Linaro GCC 4.8-2014.04 r2635) ) #1 Tue Dec 1 17:06:15 CST 2015
[ 0.000000] bootconsole [early0] enabled
[ 0.000000] CPU revision is: 0001974c (MIPS 74Kc)
[ 0.000000] SoC: Atheros AR9342 rev 2
[ 0.000000] Clocks: CPU:560.000MHz, DDR:450.000MHz, AHB:225.000MHz, Ref:40.000MHz
[ 0.000000] Determined physical RAM map:
[ 0.000000] memory: 02000000 @ 00000000 (usable)
[ 0.000000] User-defined physical RAM map:
[ 0.000000] memory: 02000000 @ 00000000 (usable)
[ 0.000000] Initrd not found or empty - disabling initrd
[ 0.000000] Zone ranges:
[ 0.000000] Normal [mem 0x00000000-0x01ffffff]
[ 0.000000] Movable zone start for each node
[ 0.000000] Early memory node ranges
[ 0.000000] node 0: [mem 0x00000000-0x01ffffff]
[ 0.000000] Primary instruction cache 64kB, VIPT, 4-way, linesize 32 bytes.
[ 0.000000] Primary data cache 32kB, 4-way, VIPT, cache aliases, linesize 32 bytes
[ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 8128
[ 0.000000] Kernel command line: board=DJI-WM305 console=ttyS0,115200 mem=32M rootfstype=squashfs,jffs2 noinitrd
[ 0.000000] PID hash table entries: 128 (order: -3, 512 bytes)
[ 0.000000] Dentry cache hash table entries: 4096 (order: 2, 16384 bytes)
[ 0.000000] Inode-cache hash table entries: 2048 (order: 1, 8192 bytes)
[ 0.000000] Writing ErrCtl register=00000000
[ 0.000000] Readback ErrCtl register=00000000
[ 0.000000] Memory: 29180k/32768k available (2102k kernel code, 3588k reserved, 363k data, 220k init, 0k highmem)
[ 0.000000] SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[ 0.000000] NR_IRQS:51
[ 0.000000] Calibrating delay loop... 278.93 BogoMIPS (lpj=1394688)
[ 0.070000] pid_max: default: 32768 minimum: 301
[ 0.070000] Mount-cache hash table entries: 512
[ 0.080000] NET: Registered protocol family 16
[ 0.080000] MIPS: machine is DJI WM305
[ 0.290000] ath_usb_init: id: 1122
[ 0.360000] bio: create slab <bio-0> at 0
[ 0.360000] Switching to clocksource MIPS
[ 0.370000] NET: Registered protocol family 2
[ 0.370000] TCP established hash table entries: 512 (order: 0, 4096 bytes)
[ 0.380000] TCP bind hash table entries: 512 (order: -1, 2048 bytes)
[ 0.390000] TCP: Hash tables configured (established 512 bind 512)
[ 0.390000] TCP: reno registered
[ 0.390000] UDP hash table entries: 256 (order: 0, 4096 bytes)
[ 0.400000] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
[ 0.410000] NET: Registered protocol family 1
[ 0.430000] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[ 0.430000] jffs2: version 2.2 (NAND) (SUMMARY) (LZMA) (RTIME) (CMODE_PRIORITY) (c) 2001-2006 Red Hat, Inc.
[ 0.440000] msgmni has been set to 56
[ 0.450000] io scheduler noop registered
[ 0.450000] io scheduler deadline registered (default)
[ 0.460000] Serial: 8250/16550 driver, 1 ports, IRQ sharing disabled
[ 0.480000] serial8250.0: ttyS0 at MMIO 0x18020000 (irq = 11) is a 16550A
[ 0.490000] console [ttyS0] enabled, bootconsole disabled
[ 0.490000] console [ttyS0] enabled, bootconsole disabled
[ 0.500000] ar934x-hs-uart.0: ttyATH0 at MMIO 0x18500000 (irq = 14) is a AR934X UART
[ 0.510000] ath79-spi ath79-spi: master is unqueued, this is deprecated
[ 0.520000] m25p80 spi0.0: found s25fl064k, expected m25p80
[ 0.520000] m25p80 spi0.0: s25fl064k (8192 Kbytes)
[ 0.530000] g_ether gadget: using random self ethernet address
[ 0.540000] g_ether gadget: using random host ethernet address
[ 0.540000] usb0: MAC d6:2f:09:9d:77:02
[ 0.550000] usb0: HOST MAC e6:00:d4:c7:90:d5
[ 0.550000] g_ether gadget: Ethernet Gadget, version: Memorial Day 2008
[ 0.560000] g_ether gadget: g_ether ready
[ 0.570000] TCP: cubic registered
[ 0.570000] NET: Registered protocol family 17
[ 0.570000] 8021q: 802.1Q VLAN Support v1.8
[ 0.580000] VFS: Cannot open root device "(null)" or unknown-block(0,0): error -6
[ 0.590000] Please append a correct "root=" boot option; here are the available partitions:
[ 0.600000] 1f00 8192 mtdblock0 (driver?)
[ 0.600000] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)