Commit ded9ad72 authored Mar 20, 2006 by Jack Morgenstein Committed by Roland Dreier Mar 24, 2006

IB/mthca: Check that SRQ WQE size does not exceed device's max value



Guarantee the calculated work queue entry size does not exceed the max
allowable WQE size when creating an SRQ.  This is a problem with Arbel
in Tavor-compatibility mode because the current WQE size computation
method rounds up to next power of 2.

Signed-off-by: Jack Morgenstein <jackm@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

parent 0ef61db8

drivers/infiniband/hw/mthca/mthca_srq.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -205,6 +205,10 @@ int mthca_alloc_srq(struct mthca_dev dev, struct mthca_pd pd,
		ds = max(64UL,
		roundup_pow_of_two(sizeof (struct mthca_next_seg) +
		srq->max_gs * sizeof (struct mthca_data_seg)));

		if (ds > dev->limits.max_desc_sz)
		return -EINVAL;

		srq->wqe_shift = long_log2(ds);

		srq->srqn = mthca_alloc(&dev->srq_table.alloc);