Commit 1252c517 authored Jul 13, 2006 by Dotan Barak Committed by Roland Dreier Jul 24, 2006

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>

parent 43db2bc0

drivers/infiniband/hw/mthca/mthca_srq.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -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);