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From: "Markus Wagner" <markus.wagner@wamasoft.de>
To: <vernoninhand@gmail.com>
Subject: AW: Problems mounting jffs2 image on nor flash > Erase at
	0x....failed	immediately: -EROFS. Is the sector locked?
Date: Thu, 8 May 2008 08:59:50 +0200
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> Hello,
>
> i have some problems to mount my jffs2 image on my NOR-Flash.
> I ported UBoot and Linux to my new board.
> So far UBoot works well but Linux has some problems to mount the flash.
>
> I can read from my flash with the dd command.
> But when I mount the flash with 'mount -t jffs2 /dev/mtdblock4 /mnt/' I
get the error: 'Erase at 0x...... failed immediately: -EROFS. Is the sector
locked?'
>
> Some Infos:
> Its an Intel P33 Strataflash.
>
> <SNIP>
>
> It seems to me that the kernel doesn't know that the flash is protected
after power up.
>
> How can I get it to work?
> Where should I look at?
>
> Thanks for your help.
> Markus
>
>   
>You did not mention exactly which device you are using. I just posted a 
>patch to the list that added more StrataFlash devices to the fixup table 
>so they are unlocked at power up.

>See [PATCH] mtd: add more StrataFlash chip ids that need powerup fixup

>Vern

It s a 28F256P33 Strataflash.

I have done a workaround in add_mtd_partitions()
If I detect the filesystem partition I fire a manually unlock to it.
Works so far.

But I will search your patch in the archive.
Seems to be the better solution.

Thx
Markus