RDMA/mana_ib: Prevent array underflow in mana_ib_create_qp_raw()

The "port" comes from the user and if it is zero then the:

	ndev = mc->ports[port - 1];

assignment does an out of bounds read.  I have changed the if
statement to fix this and to mirror how it is done in
mana_ib_create_qp_rss().

Fixes: 0266a17 ("RDMA/mana_ib: Add a driver for Microsoft Azure Network Adapter")
Signed-off-by: Dan Carpenter <[email protected]>
Link: https://lore.kernel.org/r/Y8/3Vn8qx00kE9Kk@kili
Acked-by: Long Li <[email protected]>
Signed-off-by: Leon Romanovsky <[email protected]>

Author: error27

drivers/infiniband/hw/mana/qp.c

@@ -289,7 +289,7 @@ static int mana_ib_create_qp_raw(struct ib_qp *ibqp, struct ib_pd *ibpd,
 
 	/* IB ports start with 1, MANA Ethernet ports start with 0 */
 	port = ucmd.port;
-	if (ucmd.port > mc->num_ports)
+	if (port < 1 || port > mc->num_ports)
 		return -EINVAL;
 
 	if (attr->cap.max_send_wr > MAX_SEND_BUFFERS_PER_QUEUE) {