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>

2 files changed, 5 insertions, 2 deletions

diff --git a/drivers/infiniband/hw/nes/nes_hw.c b/drivers/infiniband/hw/nes/nes_hw.c
index b59ca5659423..6f625a962b30 100644
--- a/drivers/infiniband/hw/nes/nes_hw.c
+++ b/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");
diff --git a/drivers/infiniband/hw/nes/nes_verbs.c b/drivers/infiniband/hw/nes/nes_verbs.c
index ea4e22ea2d49..155286b6e74e 100644
--- a/drivers/infiniband/hw/nes/nes_verbs.c
+++ b/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) {