tree 1b23e606aad8bc58dbe68ca905c0658625fb176e
parent ceb0c642624f634c5b4f46b0e22df19be87a2e53
author Tejun Heo <htejun@gmail.com> 1196840587 +0900
committer Jeff Garzik <jeff@garzik.org> 1201083854 -0500

libata: update ->data_xfer hook for ATAPI

Depending on how many bytes are transferred as a unit, PIO data
transfer may consume more bytes than requested.  Knowing how much
data is consumed is necessary to determine how much is left for
draining.  This patch update ->data_xfer such that it returns the
number of consumed bytes.

While at it, it also makes the following changes.

* s/adev/dev/
* use READ/WRITE constants for rw indication
* misc clean ups

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>