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authorRobert Walsh <robert.walsh@qlogic.com>2007-06-18 14:24:35 -0700
committerRoland Dreier <rolandd@cisco.com>2007-07-09 20:12:25 -0700
commite7340f04426416a6655ffaead4651bfb9e1b0848 (patch)
tree1ce7d3c405bc9e4ea69871e40504b057eeb30e66 /drivers/infiniband/hw/ipath/ipath_qp.c
parent380bf5d38f3cc2799ed2fae554f7af1c4b0ed35b (diff)
IB/ipath: Fix maximum MTU reporting
Although our chip supports 4K MTUs, our driver doesn't yet support this feature, so limit the maximum MTU to 2K until we get support for 4K MTUs implemented. Signed-off-by: Robert Walsh <robert.walsh@qlogic.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband/hw/ipath/ipath_qp.c')
-rw-r--r--drivers/infiniband/hw/ipath/ipath_qp.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/infiniband/hw/ipath/ipath_qp.c b/drivers/infiniband/hw/ipath/ipath_qp.c
index bfef08ecd34..9e07abba8aa 100644
--- a/drivers/infiniband/hw/ipath/ipath_qp.c
+++ b/drivers/infiniband/hw/ipath/ipath_qp.c
@@ -507,8 +507,13 @@ int ipath_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
attr->port_num > ibqp->device->phys_port_cnt)
goto inval;
+ /*
+ * Note: the chips support a maximum MTU of 4096, but the driver
+ * hasn't implemented this feature yet, so don't allow Path MTU
+ * values greater than 2048.
+ */
if (attr_mask & IB_QP_PATH_MTU)
- if (attr->path_mtu > IB_MTU_4096)
+ if (attr->path_mtu > IB_MTU_2048)
goto inval;
if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)