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IB/mthca: Fix SRQ limit event range check

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Mem-free HCAs always keep one spare SRQ WQE, so the SRQ limit cannot
be set beyond srq->max - 1.

Signed-off-by: Dotan Barak <dotanb@mellanox.co.il>
Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Dotan Barak 2006-07-13 11:05:49 +03:00 committed by Roland Dreier
parent 43db2bc044
commit 1252c517cf
1 changed files with 2 additions and 1 deletions
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3
drivers/infiniband/hw/mthca/mthca_srq.c
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@ -370,7 +370,8 @@ int mthca_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
return -EINVAL;
if (attr_mask & IB_SRQ_LIMIT) {
if (attr->srq_limit > srq->max)
u32 max_wr = mthca_is_memfree(dev) ? srq->max - 1 : srq->max;
if (attr->srq_limit > max_wr)
return -EINVAL;
mutex_lock(&srq->mutex);