tree d27379ab4ff2b101a74ffe594e2dfa2939131ee0
parent 5ed57ad705d6b58386ac43d2ca1c8fc66aee1101
author Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> 1238523313 +0200
committer Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> 1238523313 +0200

ide-cd: use scatterlists for PIO transfers (fs requests)

* Export ide_pio_bytes().

* Add ->last_xfer_len field to struct ide_cmd.

* Add ide_cd_error_cmd() helper to ide-cd.

* Convert ide-cd to use scatterlists also for PIO transfers (fs requests
  only for now) and get rid of partial completions (except when the error
  happens -- which is still subject to change later because looking at
  ATAPI spec it seems that the device is free to error the whole transfer
  with setting the Error bit only on the last transfer chunk).

* Update ide_cd_{prepare_rw,restore_request,do_request}() accordingly.

* Inline ide_cd_restore_request() into cdrom_start_rw().

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>