> So, the matrix of what the driver does now looks like this:
>
> dd->wc_cookie == 0: PAT was used
> dd->wc_cookie > 0: wc was used successfully wc_cookie < 0: neither PAT
> dd->nor wc was used
>
> I've fixed up the change to simply switch wc_cookie from unsigned long to plain
> long and left the original code as it was, and it is now staged for 4.1-rc.
>
I have a v2 of this patch that changes the type of the wc_cookie.
It also uses any negative cookie as the ret. It seems better to use in actual error arch_phys_wc_add() from vs. a canned one.
Mike
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