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| author | Nicholas Bellinger <nab@linux-iscsi.org> | 2015-04-08 00:53:27 +0300 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2015-04-14 22:37:38 +0300 |
| commit | c8e639852ad720499912acedfd6b072325fd2807 (patch) | |
| tree | 9a36ded92c2e3dab7c7e8a0bd5a5f0aa0d7dd884 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | 9ac8928e6a3e1ed02e632e45aa766129fe6b1802 (diff) | |
| download | linux-c8e639852ad720499912acedfd6b072325fd2807.tar.xz | |
target: Fix COMPARE_AND_WRITE with SG_TO_MEM_NOALLOC handling
This patch fixes a bug for COMPARE_AND_WRITE handling with
fabrics using SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC.
It adds the missing allocation for cmd->t_bidi_data_sg within
transport_generic_new_cmd() that is used by COMPARE_AND_WRITE
for the initial READ payload, even if the fabric is already
providing a pre-allocated buffer for cmd->t_data_sg.
Also, fix zero-length COMPARE_AND_WRITE handling within the
compare_and_write_callback() and target_complete_ok_work()
to queue the response, skipping the initial READ.
This fixes COMPARE_AND_WRITE emulation with loopback, vhost,
and xen-backend fabric drivers using SG_TO_MEM_NOALLOC.
Reported-by: Christoph Hellwig <hch@lst.de>
Cc: Christoph Hellwig <hch@lst.de>
Cc: <stable@vger.kernel.org> # v3.12+
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions