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| author |   Sagi Grimberg <sagig@mellanox.com> | 2015-06-04 19:49:19 +0300 |
|---|---|---|
| committer |   Nicholas Bellinger <nab@linux-iscsi.org> | 2015-06-08 22:16:17 -0700 |
| commit | 9253e667ab50fd4611a60e1cdd6a6e05a1d91cf1 (patch) | |
| tree | 9dbaca3c21b23740733e578e175795e5a47e7564 /drivers/infiniband/ulp | |
| parent | iser-target: Fix error path in isert_create_pi_ctx() (diff) | |
| download | linux-dev-9253e667ab50fd4611a60e1cdd6a6e05a1d91cf1.tar.xz linux-dev-9253e667ab50fd4611a60e1cdd6a6e05a1d91cf1.zip | |
iser-target: Fix variable-length response error completion
Since commit "2426bd456a6 target: Report correct response ..."
we might get a command with data_size that does not fit to
the number of allocated data sg elements. Given that we rely on
cmd t_data_nents which might be different than the data_size,
we sometimes receive local length error completion. The correct
approach would be to take the command data_size into account when
constructing the ib sg_list.
Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Jenny Falkovich <jennyf@mellanox.com>
Cc: stable@vger.kernel.org # 3.16+
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/infiniband/ulp')
| -rw-r--r-- | drivers/infiniband/ulp/isert/ib_isert.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/infiniband/ulp/isert/ib_isert.c b/drivers/infiniband/ulp/isert/ib_isert.c index 3f40319a55da..2c86bd1f1417 100644 --- a/drivers/infiniband/ulp/isert/ib_isert.c +++ b/drivers/infiniband/ulp/isert/ib_isert.c @@ -2380,7 +2380,6 @@ isert_build_rdma_wr(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, page_off = offset % PAGE_SIZE; send_wr->sg_list = ib_sge; - send_wr->num_sge = sg_nents; send_wr->wr_id = (uintptr_t)&isert_cmd->tx_desc; /* * Perform mapping of TCM scatterlist memory ib_sge dma_addr. @@ -2400,14 +2399,17 @@ isert_build_rdma_wr(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, ib_sge->addr, ib_sge->length, ib_sge->lkey); page_off = 0; data_left -= ib_sge->length; + if (!data_left) + break; ib_sge++; isert_dbg("Incrementing ib_sge pointer to %p\n", ib_sge); } + send_wr->num_sge = ++i; isert_dbg("Set outgoing sg_list: %p num_sg: %u from TCM SGLs\n", send_wr->sg_list, send_wr->num_sge); - return sg_nents; + return send_wr->num_sge; } static int |