[U-Boot] Remounting UBI image leads to ECC errors

[Bo Shen]

Hi Mark,

On 02/26/2013 11:11 PM, Mark Jackson wrote:
> We have a custom made AM335x board I'm working on and I have encountered
> a problem when mounting an ubifs image from nand.  If I ...
>
> (1) Write an ubifs image to nand
> (2) Mount the ubifs image
> (3) Repeat step (2)
>
> ... this then corrupts the ubifs image.
>
> Below is a full log.
>
> Can anyone help ?
>
> Regards
> Mark J.
> ---
> U-Boot SPL 2013.01-00336-g044fbc4-dirty (Feb 26 2013 - 14:07:36)
> U-Boot 2013.01-00336-g044fbc4-dirty (Feb 26 2013 - 14:07:36)
> I2C:   ready
> DRAM:  256 MiB
> WARNING: Caches not enabled
> NAND:  256 MiB
> MMC:   OMAP SD/MMC: 0, OMAP SD/MMC: 1
> musb-hdrc: ConfigData=0xde (UTMI-8, dyn FIFOs, bulk combine, bulk split, HB-ISO Rx, HB-ISO Tx, SoftConn)
> musb-hdrc: MHDRC RTL version 2.0
> musb-hdrc: setup fifo_mode 4
> musb-hdrc: 28/31 max ep, 16384/16384 memory
> USB Host mode controller at 47401000 using PIO, IRQ 0
> Net:   cpsw
> U-Boot# nandecc hw 2
> HW BCH8 selected
> U-Boot# mw.b 82000000 ff 81f000
> U-Boot# dhcp 82000000 10.0.0.100:/nanobone/rootfs.ubifs
> link up on port 0, speed 100, full duplex
> BOOTP broadcast 1
> *** Unhandled DHCP Option in OFFER/ACK: 46
> *** Unhandled DHCP Option in OFFER/ACK: 46
> DHCP client bound to address 10.0.0.104
> Using cpsw device
> TFTP from server 10.0.0.100; our IP address is 10.0.0.104
> Filename '/nanobone/rootfs.ubifs'.
> Load address: 0x82000000
> Loading: #################################################################
>           #################################################################
>           #################################################################
>           #################################################################
>           #################################################################
>           #################################################################
>           #####################
>           657.2 KiB/s
> done
> Bytes transferred = 6029312 (5c0000 hex)
> U-Boot# nand erase 200000 4000000
>
> NAND erase: device 0 offset 0x200000, size 0x4000000
> Erasing at 0x41e0000 -- 100% complete.
> OK
> U-Boot# nand write 82000000 200000 81f000

Please try to write with sub command trimffs. The command looks like
nand write.trimffs 82000000 200000 81f000

If not has trimffs sub command, please add CONFIG_CMD_NAND_TRIMFFS into 
board configuration file.

Best Regards,
Bo Shen