On Sun, May 18, 2003 at 09:43:41AM +0000, Arjan van de Ven wrote:
> Most drivers will just say "look I
> can do THIS much. I don't give a flying fish about how much of
> that you actually use". At least in the probing code.
The platform code needs a way to indicate the given mask will not work.
Rejecting proposals by the driver seems reasonable if the driver
only supports two different masks anyway (eg 64 and 32-bit).
In the case of a platform requiring 64-bit masks for consistent mappings,
the platform DMA code must reject proposals for non-64-bit DMA masks.
(eg PCI-X device implementing less than 64-bits)
In both cases the driver will care because it will crash the box otherwise.
grant
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This archive was generated by hypermail 2b29 : Fri May 23 2003 - 22:00:31 EST