[U-Boot-Users] Re: JFFS2 images written from U-Boot unusable in Linux? (Round 2)

[Pantelis Antoniou]

Martin Egholm Nielsen wrote:
> Hi again,
> 
> New information entered the scene: I tried another (identical) board 
> today having none of the "Bad eraseblock" messages from my Linux kernel. 
> And then everything worked!
> Hence, my boardsupplier suggested that U-Boot "ignored" these "Bad 
> eraseblock" that the NAND presumable was born with... What do you think?
> 
> BR,
>  Martin Egholm
> 
>>>>> # mount -t jffs2 /dev/mtdblock0 /mnt
>>>>> jffs2: Erase block size too small (16KiB). Using virtual blocks 
>>>>> size (32KiB) instead
>>>>> Cowardly refusing to erase blocks on filesystem with no valid JFFS2 
>>>>> nodes
>>>>> empty_blocks 0, bad_blocks 5, c->nr_blocks 2048
>>>>> mount: Mounting /dev/mtdblock0 on /mnt failed: Invalid argument
> 
> ==== 8< 8< 8< ====
> 
>> But I'm getting some info from the Kernel at startup:
>> Scanning device for bad blocks
>> Bad eraseblock 1 at 0x00004000
>> Bad eraseblock 2 at 0x00008000
>> Bad eraseblock 3 at 0x0000c000
>> Bad eraseblock 4 at 0x00010000
>> Bad eraseblock 5 at 0x00014000
>> Bad eraseblock 6 at 0x00018000
>> Bad eraseblock 7 at 0x0001c000
>> Bad eraseblock 1600 at 0x01900000
> 
> 
>>>> I think it's not u-boot's fault -- u-boot is actually being better 
>>>> than the kernel about reading a damaged JFFS2 fs, where the kernel 
>>>> refuses to.
>>
>> Sounds resonable to assume yes - I just wondered whether U-Boot had 
>> some sophisticated way of writing the image to the nand, that required 
>> some specific kernel configuration.
> 
> 
> 
> 
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> 

NAND support is currently broken when bad blocks are present.

Will sent patches shortly dealing with the problems...

Regards

Pantelis