• David Brownell's avatar
    NOR: invalidate cached state on target resume · 5fdf9535
    David Brownell authored
    The NOR infrastructure caches some per-sector state, but
    it's not used much ... because the cache is not trustworthy.
    This patch addresses one part of that problem, by ensuring
    that state cached by NOR drivers gets invalidated once we
    resume the target -- since targets may then modify sectors.
    Now if we see sector protection or erase status marked as
    anything other than "unknown", we should be able to rely
    on that as being accurate.  (That is ... if we assume the
    drivers initialize and update this state correctly.)
    Another part of that problem is that the cached state isn't
    much used (being unreliable, it would have been unsafe).
    Those issues can be addressed in later patches.
    Signed-off-by: default avatarDavid Brownell <dbrownell@users.sourceforge.net>