Write Protect Error re-flashing /dev/nor0.barebox

Write Protect Error re-flashing /dev/nor0.barebox

[Jerry Kirk]

We are updating from 2012-03 to 2012-09 and after flashing our SOM
(Phytec PCM043 - imx35) we starting getting this error:

barebox:/ erase /dev/nor0.barebox
                                     
erase: Operation not permitted

It worked the first time, when overwriting the 2012-03 image and booted, etc.
We have tried a few intermediate Barebox versions and think it worked up to 2012-
07.

Any ideas what we now need to do to be able to overwrite Barebox?




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Re: Write Protect Error re-flashing /dev/nor0.barebox

[Jean-Christophe PLAGNIOL-VILLARD]

On 19:07 Wed 26 Sep     , Jerry Kirk wrote:
> We are updating from 2012-03 to 2012-09 and after flashing our SOM
> (Phytec PCM043 - imx35) we starting getting this error:
> 
> barebox:/ erase /dev/nor0.barebox
>                                      
> erase: Operation not permitted
did you unprotect first?

Best Regards,
J.

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Re: Write Protect Error re-flashing /dev/nor0.barebox

[Jerry Kirk]

Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...> writes:

> 
> On 19:07 Wed 26 Sep     , Jerry Kirk wrote:
> > We are updating from 2012-03 to 2012-09 and after flashing our SOM
> > (Phytec PCM043 - imx35) we starting getting this error:
> > 
> > barebox:/ erase /dev/nor0.barebox
> >                                      
> > erase: Operation not permitted
> did you unprotect first?

Yes, just didn't include that in my snippet. The unprotect command did 
not return an error.
 




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Re: Write Protect Error re-flashing /dev/nor0.barebox

[Sascha Hauer]

Hi Jerry,

On Wed, Sep 26, 2012 at 07:07:32PM +0000, Jerry Kirk wrote:
> We are updating from 2012-03 to 2012-09 and after flashing our SOM
> (Phytec PCM043 - imx35) we starting getting this error:
> 
> barebox:/ erase /dev/nor0.barebox
>                                      
> erase: Operation not permitted
> 
> It worked the first time, when overwriting the 2012-03 image and booted, etc.
> We have tried a few intermediate Barebox versions and think it worked up to 2012-
> 07.
> 
> Any ideas what we now need to do to be able to overwrite Barebox?

I think you are the victim of a bug fix ;)

You probably registered the partition readonly. (see the 'ro'
flag in the mtdparts variable). Since some releases barebox
actually honors this flag:

commit a4fde70067b6113fd9dc7a4295ebd3f55b756db6
Author: Jan Luebbe <jlu@pengutronix.de>
Date:   Mon Jun 25 14:03:27 2012 +0200

    fs/devfs.c: disallow write and erase if a partition is read-only
    
    Signed-off-by: Jan Luebbe <jlu@pengutronix.de>
    Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>


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Re: Write Protect Error re-flashing /dev/nor0.barebox

[Jerry Kirk]

Sascha Hauer <s.hauer@...> writes:
> On Wed, Sep 26, 2012 at 07:07:32PM +0000, Jerry Kirk wrote:
> > Any ideas what we now need to do to be able to overwrite Barebox?
> 
> I think you are the victim of a bug fix ;)

Thanks Sascha, that was it. 


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