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author | Tejun Heo <tj@kernel.org> | 2009-04-18 23:46:02 (GMT) |
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committer | Jens Axboe <jens.axboe@oracle.com> | 2009-04-28 05:37:31 (GMT) |
commit | eb6a61bb9543aa54d62595e27206b3d3c0293bcc (patch) | |
tree | 97d165ad28f62ff4754caff4ebde30e0506259d7 /init | |
parent | 08f370f0a2fb223bf48d0bfa2a173be0393c19dc (diff) | |
download | linux-fsl-qoriq-eb6a61bb9543aa54d62595e27206b3d3c0293bcc.tar.xz |
ide-atapi,tape,floppy: allow ->pc_callback() to change rq->data_len
Impact: allow residual count implementation in ->pc_callback()
rq->data_len has two duties - carrying the number of input bytes on
issue and carrying residual count back to the issuer on completion.
ide-atapi completion callback ->pc_callback() is the right place to do
this but currently ide-atapi depends on rq->data_len carrying the
original request size after calling ->pc_callback() to complete the pc
request.
This patch makes ide_pc_intr(), ide_tape_issue_pc() and
ide_floppy_issue_pc() cache length to complete before calling
->pc_callback() so that it can modify rq->data_len as necessary.
Note: As using rq->data_len for two purposes can make cases like this
incorrect in subtle ways, future changes will introduce separate
field for residual count.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'init')
0 files changed, 0 insertions, 0 deletions