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authorSagi Grimberg <sagig@mellanox.com>2014-05-18 18:32:38 +0300
committerRoland Dreier <roland@purestorage.com>2014-05-27 11:52:54 -0700
commit8524867b9c3d11e38de084f47e2128f43e74610a (patch)
treeaf2c26d8bd1ad3e9cdc1ca2728231374d970d51f /drivers/infiniband/hw
parentd6d211db37e75de2ddc3a4f979038c40df7cc79c (diff)
downloadop-kernel-dev-8524867b9c3d11e38de084f47e2128f43e74610a.zip
op-kernel-dev-8524867b9c3d11e38de084f47e2128f43e74610a.tar.gz
mlx5_core: Fix signature handover operation for interleaved buffers
When the data and protection are interleaved in the memory domain, no need to expand the mkey total length. At the moment no Linux user works (iSER initiator & target) in interleaved mode. This may change in the future as for SCSI pass-through devices there is no real point in target performing de-interleaving and re-interleaving of the protection data in the PT stage. Regardless, signature verbs support this mode. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'drivers/infiniband/hw')
-rw-r--r--drivers/infiniband/hw/mlx5/qp.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/infiniband/hw/mlx5/qp.c b/drivers/infiniband/hw/mlx5/qp.c
index dc930ed..74ee4a4 100644
--- a/drivers/infiniband/hw/mlx5/qp.c
+++ b/drivers/infiniband/hw/mlx5/qp.c
@@ -2275,7 +2275,10 @@ static int set_sig_umr_wr(struct ib_send_wr *wr, struct mlx5_ib_qp *qp,
/* length of the protected region, data + protection */
region_len = wr->sg_list->length;
- if (wr->wr.sig_handover.prot)
+ if (wr->wr.sig_handover.prot &&
+ (wr->wr.sig_handover.prot->lkey != wr->sg_list->lkey ||
+ wr->wr.sig_handover.prot->addr != wr->sg_list->addr ||
+ wr->wr.sig_handover.prot->length != wr->sg_list->length))
region_len += wr->wr.sig_handover.prot->length;
/**
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