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Attached is a patch which improves the sanei_pio wait loop with my Epson
GT-5000.
Firstly, sanei_pio currently waits indefinitely in a busy loop if the scanne
Ive been using an Epson GT-5000 with sane successfully for a few years now,
and recently Ive tracked down a couple of annoying characteristics to
sanei_pio.c
Firstly, the sanei_pio polling loop currently runs indefinitely if the scanner
is not switched on. It has a half-baked max_polls impl
