linux-kernel - [PATCH 3.15 091/139] Target/iser: Gracefully reject T10-PI enabled connect request if not supported

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Date:	Sat, 28 Jun 2014 10:47:32 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Slava Shwartsman <valyushash@...il.com>,
	Sagi Grimberg <sagig@...lanox.com>,
	Nicholas Bellinger <nab@...ux-iscsi.org>
Subject: [PATCH 3.15 091/139] Target/iser: Gracefully reject T10-PI enabled connect request if not supported

3.15-stable review patch.  If anyone has any objections, please let me know.

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

From: Sagi Grimberg <sagig@...lanox.com>

commit 5f80ff8eccba50832dcc640ac89add4c7fced963 upstream.

In case user chose to set T10-PI enable on the target while
the IB device does not support it, gracefully reject the request.

Reported-by: Slava Shwartsman <valyushash@...il.com>
Signed-off-by: Sagi Grimberg <sagig@...lanox.com>
Signed-off-by: Nicholas Bellinger <nab@...ux-iscsi.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/infiniband/ulp/isert/ib_isert.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- a/drivers/infiniband/ulp/isert/ib_isert.c
+++ b/drivers/infiniband/ulp/isert/ib_isert.c
@@ -663,8 +663,9 @@ isert_connect_request(struct rdma_cm_id
 
 	pi_support = np->tpg_np->tpg->tpg_attrib.t10_pi;
 	if (pi_support && !device->pi_capable) {
-		pr_err("Protection information requested but not supported\n");
-		ret = -EINVAL;
+		pr_err("Protection information requested but not supported, "
+		       "rejecting connect request\n");
+		ret = rdma_reject(cma_id, NULL, 0);
 		goto out_mr;
 	}
 


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