forked from Minki/linux
IB/mthca: Fix SRQ limit event range check
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>
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@ -370,7 +370,8 @@ int mthca_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
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return -EINVAL;
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if (attr_mask & IB_SRQ_LIMIT) {
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if (attr->srq_limit > srq->max)
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u32 max_wr = mthca_is_memfree(dev) ? srq->max - 1 : srq->max;
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if (attr->srq_limit > max_wr)
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return -EINVAL;
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mutex_lock(&srq->mutex);
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