[PATCH 0/3] Q40 IDE fixes

[Michael Schmitz <schmitzmic@gmail.com>]

The pata_falcon IDE driver for m68k Q40 has been broken since Q40
was converted to use pata_falcon in preparation for removal of the
legacy IDE core in v5.14. A bug has only recently been reported.

This patch series to fix the bug has seen some discussion and review
on linux-m68k in the past week. It's also been tested on both Q40
and Atari.

The bug reporter has since found that he can use pata_legacy for
his Q40, but that is solely due to his disk written in the default
IDE byte order. Other users of Q40 will have data on disk in
big-endian order, and will have to use the pata_falcon driver
which does not attempt byte swapping to host byte order in its
data_xfer() function.

Patch 1 fixes the bug introduced in v5.14. That one ought not
to be controversial (I hope).

Patch 2 adds a module parameter to select drives to have byte
swapping to host byte order applied (useful for connecting drives
in IDE default byte order to Q40 and Atari for interoperability).

Patch 3 changes the Atari Falcon IDE platform device to use a
device ID compatible with the byte swapping scheme. This patch
should go through the m68k tree, not IDE.

Feedback welcome!

Cheers,

   Michael