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IB/mlx4: Fix endless loop in resize CQ 

When calling get_sw_cqe() we need pass the consumer_index and not the
masked value. Failure to do so will cause incorrect result of
get_sw_cqe() possibly leading to endless loop.

This problem was reported and analyzed by Michael Rice from HP.

Signed-off-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
hifive-unleashed-5.1
Eli Cohen 2013-10-31 15:26:35 +02:00 committed by Roland Dreier
parent 959f58544b
commit 93b80ac297
1 changed files with 1 additions and 1 deletions
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2
drivers/infiniband/hw/mlx4/cq.c
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@ -324,7 +324,7 @@ static int mlx4_ib_get_outstanding_cqes(struct mlx4_ib_cq *cq)
u32 i;
i = cq->mcq.cons_index;
while (get_sw_cqe(cq, i & cq->ibcq.cqe))
while (get_sw_cqe(cq, i))
++i;
return i - cq->mcq.cons_index;