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Subject[PATCH 2/6] IB/ehca: correctly set GRH mask bit in ehca_modify_qp()
Date
The driver needs to always supply the "GRH present" flag to the hypervisor,
whether it's true or false. Not supplying it (i.e. not setting the
corresponding mask bit) amounts to a "perhaps", which we don't want.

Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
---
drivers/infiniband/hw/ehca/ehca_qp.c | 12 ++++++++----
1 files changed, 8 insertions(+), 4 deletions(-)
diff --git a/drivers/infiniband/hw/ehca/ehca_qp.c b/drivers/infiniband/hw/ehca/ehca_qp.c
index df0516f..e21d796 100644
--- a/drivers/infiniband/hw/ehca/ehca_qp.c
+++ b/drivers/infiniband/hw/ehca/ehca_qp.c
@@ -968,17 +968,21 @@ static int internal_modify_qp(struct ib_
((ehca_mult - 1) / ah_mult) : 0;
else
mqpcb->max_static_rate = 0;
-
update_mask |= EHCA_BMASK_SET(MQPCB_MASK_MAX_STATIC_RATE, 1);

/*
+ * Always supply the GRH flag, even if it's zero, to give the
+ * hypervisor a clear "yes" or "no" instead of a "perhaps"
+ */
+ update_mask |= EHCA_BMASK_SET(MQPCB_MASK_SEND_GRH_FLAG, 1);
+
+ /*
* only if GRH is TRUE we might consider SOURCE_GID_IDX
* and DEST_GID otherwise phype will return H_ATTR_PARM!!!
*/
if (attr->ah_attr.ah_flags == IB_AH_GRH) {
- mqpcb->send_grh_flag = 1 << 31;
- update_mask |=
- EHCA_BMASK_SET(MQPCB_MASK_SEND_GRH_FLAG, 1);
+ mqpcb->send_grh_flag = 1;
+
mqpcb->source_gid_idx = attr->ah_attr.grh.sgid_index;
update_mask |=
EHCA_BMASK_SET(MQPCB_MASK_SOURCE_GID_IDX, 1);
--
1.4.2.1


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