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Date: Wed, 12 Aug 2009 18:12:39 +0300
From: Mike Rapoport <mike@compulab.co.il>
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To: Saurabh Kadekodi <saurabhkadekodi@gmail.com>
Subject: Re: Problem with nand flash while booting 2.6.30
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Saurabh Kadekodi wrote:
> Hi All,
> 
> I am working on a board with pxa320 processor. It has a micron 128 mb
> flash. It boots well with kernel 2.6.25, but when booting with 2.6.30,
> it somehow cannot detect the nand chip properly.
> 
> It shows following messages:
> 
> NAND device: Manufacturer ID: 0x00, Chip ID: 0xa1 (Unknown NAND 128MiB
> 1,8V 8-bit)
> 
> While with 2.6.25 it properly detects as a micron flash.

Make sure that you either select CONFIG_MTD_NAND_PXA3xx_BUILTIN or set
.keep_config flag in pxa3xx_nand_platform_data in your board configuration.

> Then later it gives a lot of ECC errors and prints the following messages:
> 
> 
> Cowardly refusing to erase blocks on filesystem with no valid JFFS2 nodes
>> empty_blocks 0, bad_blocks 208, c->nr_blocks 438
>> VFS: Cannot open root device "mtdblock2" or unknown-block(31,2)
>> Please append a correct "root=" boot option; here are the available partitions:
>> 1f00             256 mtdblock0 (driver?)
>> 1f01            2048 mtdblock1 (driver?)
>> 1f02          112128 mtdblock2 (driver?)
>> 1f03             512 mtdblock3 (driver?)
>> b300         2008064 mmcblk0 driver: mmcblk
>>   b301           31288 mmcblk0p1
>> Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(31,2)
>> Backtrace:
>> [<c0028a34>] (dump_backtrace+0x0/0x110) from [<c0028b78>] (dump_stack+0x18/0x1c)
>>  r6:c03af144 r5:c001d884 r4:cf81df54
>> [<c0028b60>] (dump_stack+0x0/0x1c) from [<c003ca9c>] (panic+0x60/0x13c)
>> [<c003ca3c>] (panic+0x0/0x13c) from [<c0008dac>] (mount_block_root+0x104/0x234)
>>  r3:00000000 r2:20000013 r1:cf81df54 r0:c0330e50
>> [<c0008ca8>] (mount_block_root+0x0/0x234) from [<c0008fb8>] (mount_root+0xdc/0x100)
>> [<c0008edc>] (mount_root+0x0/0x100) from [<c0009024>] (prepare_namespace+0x48/0x190)
>>  r7:00000000 r6:c001d840 r5:c001d83c r4:c03ae0c4
>> [<c0008fdc>] (prepare_namespace+0x0/0x190) from [<c00087dc>] (kernel_init+0xc8/0xf4)
>>  r6:c001cdec r5:c001cb58 r4:c03ae0b8
>> [<c0008714>] (kernel_init+0x0/0xf4) from [<c003fc90>] (do_exit+0x0/0x6c8)
>>  r6:00000000 r5:00000000 r4:00000000
>>
>>
> Please can someone guide me as to what maybe wrong. The flash cannot
> be corrupt as
> 2.6.25 boots correctly. Then where am I going wrong?
> 
> Thanks in advance,
> 
> Saurabh
> 
> ______________________________________________________
> Linux MTD discussion mailing list
> http://lists.infradead.org/mailman/listinfo/linux-mtd/
> 

-- 
Sincerely yours,
Mike.