On 2019-12-29 23:21, Rahul Kundu wrote:
> Below is the patch diff which removes redundant function calls added by the above commit, but I am not sure whether this is the ideal fix:
> =================================================================================================================
> diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c
> index 7251a87bb576..503a76e9cc62 100644
> --- a/drivers/target/iscsi/iscsi_target.c
> +++ b/drivers/target/iscsi/iscsi_target.c
> @@ -4234,8 +4234,6 @@ int iscsit_close_connection(
> * must wait until they have completed.
> */
> iscsit_check_conn_usage_count(conn);
> - target_sess_cmd_list_set_waiting(sess->se_sess);
> - target_wait_for_sess_cmds(sess->se_sess);
>
> ahash_request_free(conn->conn_tx_hash);
> if (conn->conn_rx_hash) {
I don't like the above change because it would reintroduce the issue fixed by
commit e9d3009cb936. How about the patch below?
Thanks,
Bart.
>From f25182525499b52db6be00b34dbfd3662d29e403 Mon Sep 17 00:00:00 2001
From: Bart Van Assche <bvanassche@xxxxxxx>
Date: Mon, 30 Dec 2019 07:48:20 -0800
Subject: [PATCH] RDMA/isert: Fix a recently introduced regression related to
logout
iscsit_close_connection() calls isert_wait_conn(). Due to commit
e9d3009cb936 both functions call target_wait_for_sess_cmds() although
that last function should be called only once. Fix this by removing
the target_wait_for_sess_cmds() call from isert_wait_conn() and by
only calling isert_wait_conn() after target_wait_for_sess_cmds().
Reported-by: Rahul Kundu <rahul.kundu@xxxxxxxxxxx>
Fixes: e9d3009cb936 ("scsi: target: iscsi: Wait for all commands to finish before freeing a session").
Signed-off-by: Bart Van Assche <bvanassche@xxxxxxx>
---
drivers/infiniband/ulp/isert/ib_isert.c | 12 ------------
drivers/target/iscsi/iscsi_target.c | 6 +++---
2 files changed, 3 insertions(+), 15 deletions(-)
diff --git a/drivers/infiniband/ulp/isert/ib_isert.c b/drivers/infiniband/ulp/isert/ib_isert.c
index a1a035270cab..b273e421e910 100644
--- a/drivers/infiniband/ulp/isert/ib_isert.c
+++ b/drivers/infiniband/ulp/isert/ib_isert.c
@@ -2575,17 +2575,6 @@ isert_wait4logout(struct isert_conn *isert_conn)
}
}
-static void
-isert_wait4cmds(struct iscsi_conn *conn)
-{
- isert_info("iscsi_conn %p\n", conn);
-
- if (conn->sess) {
- target_sess_cmd_list_set_waiting(conn->sess->se_sess);
- target_wait_for_sess_cmds(conn->sess->se_sess);
- }
-}
-
/**
* isert_put_unsol_pending_cmds() - Drop commands waiting for
* unsolicitate dataout
@@ -2633,7 +2622,6 @@ static void isert_wait_conn(struct iscsi_conn *conn)
ib_drain_qp(isert_conn->qp);
isert_put_unsol_pending_cmds(conn);
- isert_wait4cmds(conn);
isert_wait4logout(isert_conn);
queue_work(isert_release_wq, &isert_conn->release_work);
diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c
index 7251a87bb576..b94ed4e30770 100644
--- a/drivers/target/iscsi/iscsi_target.c
+++ b/drivers/target/iscsi/iscsi_target.c
@@ -4149,9 +4149,6 @@ int iscsit_close_connection(
iscsit_stop_nopin_response_timer(conn);
iscsit_stop_nopin_timer(conn);
- if (conn->conn_transport->iscsit_wait_conn)
- conn->conn_transport->iscsit_wait_conn(conn);
-
/*
* During Connection recovery drop unacknowledged out of order
* commands for this connection, and prepare the other commands
@@ -4237,6 +4234,9 @@ int iscsit_close_connection(
target_sess_cmd_list_set_waiting(sess->se_sess);
target_wait_for_sess_cmds(sess->se_sess);
+ if (conn->conn_transport->iscsit_wait_conn)
+ conn->conn_transport->iscsit_wait_conn(conn);
+
ahash_request_free(conn->conn_tx_hash);
if (conn->conn_rx_hash) {
struct crypto_ahash *tfm;
