[PATCH] sd.c
The below does two things: (i) do not try to spin up a CF reader without media (ii) be careful when asking for the cache parameters mode page [do not ask for this page when no media are present: it is meaningless, and some devices react badly if we do; check the reply so that we do not read past the end of the reply; first give a small transport length - some USB devices are unhappy if we ask for more than they provide] Andries
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