IB/mlx4: Don't return errors from poll_cq

Remove returning errors from mlx4 poll_cq function. Polling CQ
operation in kernel never fails by Mellanox HCA architecture and
respective driver design.

Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

diff --git a/drivers/infiniband/hw/mlx4/cq.c b/drivers/infiniband/hw/mlx4/cq.c
index 15b628996633f27354c90c7f492646e78b083b99..5df63dacaaa32f2b0a4944559181e3f877bb94b5 100644 (file)
--- a/drivers/infiniband/hw/mlx4/cq.c
+++ b/drivers/infiniband/hw/mlx4/cq.c
@@ -687,12 +687,6 @@ repoll:
        is_error = (cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) ==
                MLX4_CQE_OPCODE_ERROR;
 
-       if (unlikely((cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) == MLX4_OPCODE_NOP &&
-                    is_send)) {
-               pr_warn("Completion for NOP opcode detected!\n");
-               return -EINVAL;
-       }
-
        /* Resize CQ in progress */
        if (unlikely((cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) == MLX4_CQE_OPCODE_RESIZE)) {
                if (cq->resize_buf) {
@@ -718,12 +712,6 @@ repoll:
                 */
                mqp = __mlx4_qp_lookup(to_mdev(cq->ibcq.device)->dev,
                                       be32_to_cpu(cqe->vlan_my_qpn));
-               if (unlikely(!mqp)) {
-                       pr_warn("CQ %06x with entry for unknown QPN %06x\n",
-                              cq->mcq.cqn, be32_to_cpu(cqe->vlan_my_qpn) & MLX4_CQE_QPN_MASK);
-                       return -EINVAL;
-               }
-
                *cur_qp = to_mibqp(mqp);
        }
 
@@ -736,11 +724,6 @@ repoll:
                /* SRQ is also in the radix tree */
                msrq = mlx4_srq_lookup(to_mdev(cq->ibcq.device)->dev,
                                       srq_num);
-               if (unlikely(!msrq)) {
-                       pr_warn("CQ %06x with entry for unknown SRQN %06x\n",
-                               cq->mcq.cqn, srq_num);
-                       return -EINVAL;
-               }
        }
 
        if (is_send) {
@@ -891,7 +874,6 @@ int mlx4_ib_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc)
        struct mlx4_ib_qp *cur_qp = NULL;
        unsigned long flags;
        int npolled;
-       int err = 0;
        struct mlx4_ib_dev *mdev = to_mdev(cq->ibcq.device);
 
        spin_lock_irqsave(&cq->lock, flags);
@@ -901,8 +883,7 @@ int mlx4_ib_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc)
        }
 
        for (npolled = 0; npolled < num_entries; ++npolled) {
-               err = mlx4_ib_poll_one(cq, &cur_qp, wc + npolled);
-               if (err)
+               if (mlx4_ib_poll_one(cq, &cur_qp, wc + npolled))
                        break;
        }
 
@@ -911,10 +892,7 @@ int mlx4_ib_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc)
 out:
        spin_unlock_irqrestore(&cq->lock, flags);
 
-       if (err == 0 || err == -EAGAIN)
-               return npolled;
-       else
-               return err;
+       return npolled;
 }
 
 int mlx4_ib_arm_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags)