diff options
| author | Jack Morgenstein <jackm@mellanox.co.il> | 2005-12-09 16:32:21 -0800 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2005-12-09 16:32:21 -0800 |
| commit | 94361cf74a6fca1973d2fed5338d5fb4bcd902fa (patch) | |
| tree | 5b96f7c52f1d1e60d3406a41393922d77abf67b3 /drivers/infiniband | |
| parent | 52d0df153c987e4ad57d15f5df91848f65858e5d (diff) | |
| download | linux-94361cf74a6fca1973d2fed5338d5fb4bcd902fa.tar.bz2 | |
IB/mthca: check RDMA limits
Add limit checking on rd_atomic and dest_rd_atomic attributes:
especially for max_dest_rd_atomic, a value that is larger than HCA
capability can cause RDB overflow and corruption of another QP.
Signed-off-by: Jack Morgenstein <jackm@mellanox.co.il>
Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband')
| -rw-r--r-- | drivers/infiniband/hw/mthca/mthca_qp.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/mthca/mthca_qp.c b/drivers/infiniband/hw/mthca/mthca_qp.c index 7450550db736..c5c3d0edbbf5 100644 --- a/drivers/infiniband/hw/mthca/mthca_qp.c +++ b/drivers/infiniband/hw/mthca/mthca_qp.c @@ -591,6 +591,20 @@ int mthca_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int attr_mask) return -EINVAL; } + if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC && + attr->max_rd_atomic > dev->limits.max_qp_init_rdma) { + mthca_dbg(dev, "Max rdma_atomic as initiator %u too large (max is %d)\n", + attr->max_rd_atomic, dev->limits.max_qp_init_rdma); + return -EINVAL; + } + + if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC && + attr->max_dest_rd_atomic > 1 << dev->qp_table.rdb_shift) { + mthca_dbg(dev, "Max rdma_atomic as responder %u too large (max %d)\n", + attr->max_dest_rd_atomic, 1 << dev->qp_table.rdb_shift); + return -EINVAL; + } + mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); if (IS_ERR(mailbox)) return PTR_ERR(mailbox); |