RDMA/nes: Add max_cqe check to nes_create_cq()

Add a check to nes_create_cq() to return -EINVAL if creating a CQ with
depth > max_cqe (32766).
Signed-off-by: Chien Tung <chien.tin.tung@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

drivers/infiniband/hw/nes/nes_hw.c

@@ -482,7 +482,7 @@ struct nes_adapter *nes_init_adapter(struct nes_device *nesdev, u8 hw_rev) {
 	nesadapter->max_irrq_wr = (u32temp >> 16) & 3;
 
 	nesadapter->max_sge = 4;
-	nesadapter->max_cqe = 32767;
+	nesadapter->max_cqe = 32766;
 
 	if (nes_read_eeprom_values(nesdev, nesadapter)) {
 		printk(KERN_ERR PFX "Unable to read EEPROM data.\n");

drivers/infiniband/hw/nes/nes_verbs.c

@@ -527,7 +527,7 @@ static int nes_query_device(struct ib_device *ibdev, struct ib_device_attr *prop
 	props->max_qp_wr = nesdev->nesadapter->max_qp_wr - 2;
 	props->max_sge = nesdev->nesadapter->max_sge;
 	props->max_cq = nesibdev->max_cq;
-	props->max_cqe = nesdev->nesadapter->max_cqe - 1;
+	props->max_cqe = nesdev->nesadapter->max_cqe;
 	props->max_mr = nesibdev->max_mr;
 	props->max_mw = nesibdev->max_mr;
 	props->max_pd = nesibdev->max_pd;
@@ -1543,6 +1543,9 @@ static struct ib_cq *nes_create_cq(struct ib_device *ibdev, int entries,
 	unsigned long flags;
 	int ret;
 
+	if (entries > nesadapter->max_cqe)
+		return ERR_PTR(-EINVAL);
+
 	err = nes_alloc_resource(nesadapter, nesadapter->allocated_cqs,
 			nesadapter->max_cq, &cq_num, &nesadapter->next_cq);
 	if (err) {