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[3/3] target: Don't force session reset if queue_depth does not change

Message ID 1493792016-6435-4-git-send-email-nab@linux-iscsi.org (mailing list archive)
State New, archived
Headers show

Commit Message

Nicholas A. Bellinger May 3, 2017, 6:13 a.m. UTC 
From: Nicholas Bellinger <nab@linux-iscsi.org>

Keeping in the idempotent nature of target_core_fabric_configfs.c,
if a queue_depth value is set and it's the same as the existing
value, don't attempt to force session reinstatement.

Reported-by: Raghu Krishnamurthy <rk@datera.io>
Cc: Raghu Krishnamurthy <rk@datera.io>
Tested-by: Gary Guo <ghg@datera.io>
Cc: Gary Guo <ghg@datera.io>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
---
 drivers/target/target_core_tpg.c | 7 +++++++
 1 file changed, 7 insertions(+)
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Patch

diff --git a/drivers/target/target_core_tpg.c b/drivers/target/target_core_tpg.c
index dfaef4d..310d9e5 100644
--- a/drivers/target/target_core_tpg.c
+++ b/drivers/target/target_core_tpg.c
@@ -398,6 +398,13 @@  int core_tpg_set_initiator_node_queue_depth(
 	struct se_portal_group *tpg = acl->se_tpg;
 
 	/*
+	 * Allow the setting of se_node_acl queue_depth to be idempotent,
+	 * and not force a session shutdown event if the value is not
+	 * changing.
+	 */
+	if (acl->queue_depth == queue_depth)
+		return 0;
+	/*
 	 * User has requested to change the queue depth for a Initiator Node.
 	 * Change the value in the Node's struct se_node_acl, and call
 	 * target_set_nacl_queue_depth() to set the new queue depth.