linux-kernel - [PATCH 3.2 019/147] IB/ipoib: Prevent setting negative values to max_nonsrq_conn

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Message-ID: <lsq.1510009387.525462561@decadent.org.uk>
Date:   Mon, 06 Nov 2017 23:03:07 +0000
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org, "Alex Vesker" <valex@...lanox.com>,
        "Leon Romanovsky" <leon@...nel.org>
Subject: [PATCH 3.2 019/147] IB/ipoib: Prevent setting negative values to
 max_nonsrq_conn_qp

3.2.95-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Alex Vesker <valex@...lanox.com>

commit 11f74b40359b19f760964e71d04882a6caf530cc upstream.

Don't allow negative values to max_nonsrq_conn_qp. There is no functional
impact on a negative value but it is logicically incorrect.

Fixes: 68e995a29572 ("IPoIB/cm: Add connected mode support for devices without SRQs")
Signed-off-by: Alex Vesker <valex@...lanox.com>
Signed-off-by: Leon Romanovsky <leon@...nel.org>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/infiniband/ulp/ipoib/ipoib_main.c | 1 +
 1 file changed, 1 insertion(+)

--- a/drivers/infiniband/ulp/ipoib/ipoib_main.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_main.c
@@ -1366,6 +1366,7 @@ static int __init ipoib_init_module(void
 	ipoib_sendq_size = max3(ipoib_sendq_size, 2 * MAX_SEND_CQE, IPOIB_MIN_QUEUE_SIZE);
 #ifdef CONFIG_INFINIBAND_IPOIB_CM
 	ipoib_max_conn_qp = min(ipoib_max_conn_qp, IPOIB_CM_MAX_CONN_QP);
+	ipoib_max_conn_qp = max(ipoib_max_conn_qp, 0);
 #endif
 
 	/*