[PATCH v2 0/1] scsi: arm: Convert acornscsi-io.S to C

[Breno Rodrigues Alves]

v2 addresses two issues raised by the sashiko bot:

  - PTR_ALIGN() rounds up, but the assembly's "bic r0, r0, #3"
    rounds down.  Use PTR_ALIGN_DOWN() to match, otherwise an odd
    on-card offset shifts the entire transfer by one 16-bit halfword
    and can walk past the 4 KiB card window.
  - In __acornscsi_out(), the trailing byte loop advanced by 2 bytes
    into the unused upper half of the current card word.  Advance by
    a full 32-bit word (card++) so the trailing byte lands in the
    low half of the next card word, which is where the hardware
    actually samples it.

No functional change for even-length transfers.  The odd-length
behaviour is now correct for both directions.

Breno (1):
  scsi: arm: Convert acornscsi-io.S to C

 drivers/scsi/arm/acornscsi-io.S | 116 ------------
 drivers/scsi/arm/acornscsi-io.c | 168 ++++++++++++++++++++++
 drivers/scsi/arm/acornscsi-io.h |  15 +++
 drivers/scsi/arm/acornscsi.c    |   3 +-
 4 files changed, 184 insertions(+), 137 deletions(-)