tree 932ba71615dda87f859299a576430e1c65d60e1a
parent 7e340b0fe2c9523ca97b18ff1c8118e2e6aff7e6
author Tatyana Brokhman <tlinder@codeaurora.org> 1354629283 +0200
committer Tatyana Brokhman <tlinder@codeaurora.org> 1354629283 +0200

block: Add support for reinsert a dispatched req

Add support for reinserting a dispatched request back to the
scheduler's internal data structures.
This capability is used by the device driver when it chooses to
interrupt the current request transmission and execute another (more
urgent) pending request. For example: interrupting long write in order
to handle pending read. The device driver re-inserts the
remaining write request back to the scheduler, to be rescheduled
for transmission later on.

Add API for verifying whether the current scheduler
supports reinserting requests mechanism. If reinsert mechanism isn't
supported by the scheduler, this code path will never be activated.

Change-Id: I5c982a66b651ebf544aae60063ac8a340d79e67f
Signed-off-by: Tatyana Brokhman <tlinder@codeaurora.org>