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SubjectRe: DMA mapping
> of times the Qlogic f/w is confused and returns garbage instead of the correct
> handle- it's much easier to detect this when you have an index in the range of
> 0 to 1024 rather than assume what you get back from the card is a valid
> pointer.

I did the same for the i2o_block driver where I only had a 32bit wide field.
Much to my suprise having the index also meant I could use it for other
things I needed to hang on the requests and speeded the driver up

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