[PATCH 1/1] MTD: Unlocking all Intel flash that is locked on power up
nico at cam.org
Mon Nov 12 16:43:34 EST 2007
On Mon, 12 Nov 2007, Justin Treon wrote:
> > What about a new partition flag then? When set the unlock method would
> > be called on the corresponding partition if the partition is not already
> > marked read-only.
> I think that a partition flag is a good idea, but the mtd partition should be
> unlocked by defualt if it is not read only and adding the flag will keep it locked.
> How do you think it could be done that others would be accepting of
> it? I do not think everyone would like to see another flag that is so
> close to a read only flag.
Don't make the unlocking the default. The flag has simply to be set
explicitly for the unlock to occur. Few reasons for this:
1) you don't know if a particular flash requires unlocking after boot,
(most flash models don't) so doing it unconditionally is wasteful;
2) the partition might as well be meant to remain locked, except for
rare occasions when its content is updated (think bootloader) meaning
it cannot be marked read-only;
3) this is a security feature and should not be bypassed "by
default", and therefore the auto-unlock should be dependent on an
explicit flag so people needing it will have the opportunity to think
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