linux-kernel - [PATCH 5.10 335/545] RDMA/qedr: Improve error logs for rdma_alloc

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Date:   Fri, 19 Aug 2022 17:41:45 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Shai Malin <smalin@...vell.com>,
        Ariel Elior <aelior@...vell.com>,
        Prabhakar Kushwaha <pkushwaha@...vell.com>,
        Jason Gunthorpe <jgg@...dia.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.10 335/545] RDMA/qedr: Improve error logs for rdma_alloc_tid error return

From: Prabhakar Kushwaha <pkushwaha@...vell.com>

[ Upstream commit 0050a57638ca4d681ff92bee55246bf64a6afe54 ]

Use -EINVAL return type to identify whether error is returned because of
"Out of MR resources" or any other error types.

Link: https://lore.kernel.org/r/20210729151732.30995-2-pkushwaha@marvell.com
Signed-off-by: Shai Malin <smalin@...vell.com>
Signed-off-by: Ariel Elior <aelior@...vell.com>
Signed-off-by: Prabhakar Kushwaha <pkushwaha@...vell.com>
Signed-off-by: Jason Gunthorpe <jgg@...dia.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/infiniband/hw/qedr/verbs.c | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/drivers/infiniband/hw/qedr/verbs.c b/drivers/infiniband/hw/qedr/verbs.c
index f7b97b8e81a4..bffacb47ea0e 100644
--- a/drivers/infiniband/hw/qedr/verbs.c
+++ b/drivers/infiniband/hw/qedr/verbs.c
@@ -2989,7 +2989,11 @@ struct ib_mr *qedr_reg_user_mr(struct ib_pd *ibpd, u64 start, u64 len,
 
 	rc = dev->ops->rdma_alloc_tid(dev->rdma_ctx, &mr->hw_mr.itid);
 	if (rc) {
-		DP_ERR(dev, "roce alloc tid returned an error %d\n", rc);
+		if (rc == -EINVAL)
+			DP_ERR(dev, "Out of MR resources\n");
+		else
+			DP_ERR(dev, "roce alloc tid returned error %d\n", rc);
+
 		goto err1;
 	}
 
@@ -3084,7 +3088,11 @@ static struct qedr_mr *__qedr_alloc_mr(struct ib_pd *ibpd,
 
 	rc = dev->ops->rdma_alloc_tid(dev->rdma_ctx, &mr->hw_mr.itid);
 	if (rc) {
-		DP_ERR(dev, "roce alloc tid returned an error %d\n", rc);
+		if (rc == -EINVAL)
+			DP_ERR(dev, "Out of MR resources\n");
+		else
+			DP_ERR(dev, "roce alloc tid returned error %d\n", rc);
+
 		goto err0;
 	}
 
@@ -3214,7 +3222,11 @@ struct ib_mr *qedr_get_dma_mr(struct ib_pd *ibpd, int acc)
 
 	rc = dev->ops->rdma_alloc_tid(dev->rdma_ctx, &mr->hw_mr.itid);
 	if (rc) {
-		DP_ERR(dev, "roce alloc tid returned an error %d\n", rc);
+		if (rc == -EINVAL)
+			DP_ERR(dev, "Out of MR resources\n");
+		else
+			DP_ERR(dev, "roce alloc tid returned error %d\n", rc);
+
 		goto err1;
 	}
 
-- 
2.35.1