tree 475b3a2a7cd102f40d7c16fed431c227576c255a
parent c7984f4e4e3af3bf8027d636283ea8658c7f80b9
author Dan Williams <dan.j.williams@intel.com> 1248817444 -0700
committer Dan Williams <dan.j.williams@intel.com> 1252456195 -0700

ioat1: move descriptor allocation from submit to prep

The async_tx api assumes that after a successful ->prep a subsequent
->submit will not fail due to a lack of resources.

This also fixes a bug in the allocation failure case.  Previously the
descriptors allocated prior to the allocation failure would not be
returned to the free list.

Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>