tree c9cd1990da5bc8cc11808a78067e96923091e006
parent 38b11bae6ba02da352340aff12ee25755977b222
author Nicholas Bellinger <nab@linux-iscsi.org> 1349137402 -0700
committer Nicholas Bellinger <nab@linux-iscsi.org> 1349212568 -0700

target: Add target_submit_cmd_map_sgls for SGL fabric memory passthrough

This patch adds a new target_submit_cmd_map_sgls() to pass pre-allocated
SGL memory using transport_generic_map_mem_to_cmd() logic into the generic
target submit I/O codepath.

It also adds a target_submit_cmd() wrapper around target_submit_cmd_map_sgls()
for existing fabric code that already assumes internal target-core SGL memory
allocation.

(v2: Rename to target_submit_cmd_map_sgls + drop TARGET_SCF_MAP_MEM flag
     in favor of non zero sgl_count check)

Reported-by: Christoph Hellwig <hch@lst.de>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>