[U-Boot] [PATCH] imximage: header v2: Remove overwriting of flash_offset

[Dirk Behme]

On 22.02.2012 10:29, Stefano Babic wrote:
> On 22/02/2012 09:14, Dirk Behme wrote:
>> On 21.02.2012 22:49, stefano babic wrote:
>>> Am 21/02/2012 20:18, schrieb Dirk Behme:
>>>
> 
> Hi Dirk,
> 
>> What do you think about anything like below then [1]?
>>
>> I looked through the imximage.c code and, well, due to the mixture to
>> support the v1 and v2 header format, the execution path isn't the
>> cleanest one. So, while it doesn't seem to be the cleanest way to exit
>> directly in set_imx_hdr_v2, it seems to be the easiest and best place to
>> add this check. Some other functions have some exit() calls, too, so it
>> seems to be common practice in this code.
> 
> It is common in all mkimage - when there is an error, it makes no sense
> to go on.
> 
> You must also fix this issue for V1 in set_imx_hdr_v1() as well, because
> we do not want default value at all.

Ok, the V1 topic is new.

I can't touch V1 because I don't know anything about it. And I don't 
have any hardware to test anything V1 related.

Even though the V1 code might have a similar issue, it's my 
understanding that it doesn't hurt there as in V1 there are no 
flash_offsets != FLASH_OFFSET_STANDARD. Therefore in V1 the existing 
code works fine (?). Same as the V2 code before Freescale introduced 
flash offsets which are not FLASH_OFFSET_STANDARD (== 0x400).

> I suggest also you do not check
> with if(imxhdr->flash_offset == 0), in case Freescale will put a SOC
> without an offset in the future. But it is easy to add a value that is
> not allowed. If we add something like
> 
> 	FLASH_OFFSET_UNDEFINED = 0xFF
> 
> or whatever you want that is not 32-bit aligned, we are on the safest side.

I will look where the correct location might be to add this.

>> If this is ok, I will send a v2 of the patch.

I will try to update the V2 header with something like 
FLASH_OFFSET_UNDEFINED as proposed above and then send a v2 of the patch.

Best regards

Dirk