From: Yuval Shaia <yuval.shaia@oracle.com>
Date: Wed, 27 Jul 2016 08:24:53 +0000 (-0700)
Subject: IB/mlx4: Return EAGAIN for any error in mlx4_ib_poll_one
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=5412352fcd8fba7f278ae8c9ba36296716f17ae8;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

IB/mlx4: Return EAGAIN for any error in mlx4_ib_poll_one

Error code EAGAIN should be used when errors are temporary and next call
might succeeds.
When error code other than EAGAIN is returned, the caller (mlx4_ib_poll)
will assume all CQE in the same bunch are error too and will drop them all.

Signed-off-by: Yuval Shaia <yuval.shaia@oracle.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 15b628996633..006db6436e3b 100644
--- a/drivers/infiniband/hw/mlx4/cq.c
+++ b/drivers/infiniband/hw/mlx4/cq.c
@@ -690,7 +690,7 @@ repoll:
 	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;
+		return -EAGAIN;
 	}
 
 	/* Resize CQ in progress */
@@ -721,7 +721,7 @@ repoll:
 		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;
+			return -EAGAIN;
 		}
 
 		*cur_qp = to_mibqp(mqp);
@@ -739,7 +739,7 @@ repoll:
 		if (unlikely(!msrq)) {
 			pr_warn("CQ %06x with entry for unknown SRQN %06x\n",
 				cq->mcq.cqn, srq_num);
-			return -EINVAL;
+			return -EAGAIN;
 		}
 	}