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driver (pciide, wdc, etc.)
Remove #define WDCDEBUG from top of files
More fixes to ATAPISCSI logic:
Not all devices transition correctly between phases. Devices are supposed
to keep BSY high until they've set the registers to the next sensible
state. Some devices drop BSY and leave the registers in an old or
nonsense state. Our polling code is extremely sensitive to this
(though an early itnerrupt could also observe this). So, if the device is
in an unexpected state, the new polling code waits for a while in the hope
that it enters a better state.
This seems to fix many of the problems reported.
Also, there was a horrible bug which would cause sense to fail on a ATAPI
command that sent data to the drive
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