1 for the status page
1 to always have 1 free entry to detect full.
Signed-off-by: Steve Wise <[email protected]>
---
drivers/infiniband/hw/cxgb4/cq.c | 5 ++++-
1 files changed, 4 insertions(+), 1 deletions(-)
diff --git a/drivers/infiniband/hw/cxgb4/cq.c b/drivers/infiniband/hw/cxgb4/cq.c
index fb1aafc..46ac00f 100644
--- a/drivers/infiniband/hw/cxgb4/cq.c
+++ b/drivers/infiniband/hw/cxgb4/cq.c
@@ -780,6 +780,9 @@ struct ib_cq *c4iw_create_cq(struct ib_device *ibdev, int
entries,
/* account for the status page. */
entries++;
+ /* IQ needs one extra entry to differentiate full vs empty. */
+ entries++;
+
/*
* entries must be multiple of 16 for HW.
*/
@@ -801,7 +804,7 @@ struct ib_cq *c4iw_create_cq(struct ib_device *ibdev, int
entries,
chp->rhp = rhp;
chp->cq.size--; /* status page */
- chp->ibcq.cqe = chp->cq.size;
+ chp->ibcq.cqe = chp->cq.size - 1;
spin_lock_init(&chp->lock);
atomic_set(&chp->refcnt, 1);
init_waitqueue_head(&chp->wait);
--
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