From f88a10f80da9ed1ab1ba7496b70e9a0cdd8f7cf8 Mon Sep 17 00:00:00 2001 From: Sebastian Andrzej Siewior Date: Sun, 20 Dec 2020 21:36:35 +0100 Subject: scsi: target: iscsi: Redo iscsit_check_session_usage_count() return code The return value of iscsit_check_session_usage_count() is only checked if it was not allowed to sleep. If it returns `2' then a timer is prepared. If it returns something else or if it was allowed to sleep then it is ignored. Let iscsit_check_session_usage_count() return true if it needs to arm the timer - otherwise false. This simplifies the code flow of the only caller. Link: https://lore.kernel.org/r/20201220203638.43615-4-bigeasy@linutronix.de Signed-off-by: Sebastian Andrzej Siewior Signed-off-by: Martin K. Petersen --- drivers/target/iscsi/iscsi_target.c | 12 ++++-------- drivers/target/iscsi/iscsi_target_util.c | 9 +++++---- drivers/target/iscsi/iscsi_target_util.h | 2 +- 3 files changed, 10 insertions(+), 13 deletions(-) (limited to 'drivers/target/iscsi') diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c index 13de37ff9dc9..d0e7ed8f28cc 100644 --- a/drivers/target/iscsi/iscsi_target.c +++ b/drivers/target/iscsi/iscsi_target.c @@ -4399,14 +4399,10 @@ int iscsit_close_session(struct iscsi_session *sess, bool can_sleep) * time2retain handler) and contain and active session usage count we * restart the timer and exit. */ - if (can_sleep) { - iscsit_check_session_usage_count(sess, can_sleep); - } else { - if (iscsit_check_session_usage_count(sess, can_sleep) == 2) { - atomic_set(&sess->session_logout, 0); - iscsit_start_time2retain_handler(sess); - return 0; - } + if (iscsit_check_session_usage_count(sess, can_sleep)) { + atomic_set(&sess->session_logout, 0); + iscsit_start_time2retain_handler(sess); + return 0; } transport_deregister_session(sess->se_sess); diff --git a/drivers/target/iscsi/iscsi_target_util.c b/drivers/target/iscsi/iscsi_target_util.c index 50028b1d3b84..9468b017b4a7 100644 --- a/drivers/target/iscsi/iscsi_target_util.c +++ b/drivers/target/iscsi/iscsi_target_util.c @@ -779,21 +779,22 @@ void iscsit_free_cmd(struct iscsi_cmd *cmd, bool shutdown) } EXPORT_SYMBOL(iscsit_free_cmd); -int iscsit_check_session_usage_count(struct iscsi_session *sess, bool can_sleep) +bool iscsit_check_session_usage_count(struct iscsi_session *sess, + bool can_sleep) { spin_lock_bh(&sess->session_usage_lock); if (sess->session_usage_count != 0) { sess->session_waiting_on_uc = 1; spin_unlock_bh(&sess->session_usage_lock); if (!can_sleep) - return 2; + return true; wait_for_completion(&sess->session_waiting_on_uc_comp); - return 1; + return false; } spin_unlock_bh(&sess->session_usage_lock); - return 0; + return false; } void iscsit_dec_session_usage_count(struct iscsi_session *sess) diff --git a/drivers/target/iscsi/iscsi_target_util.h b/drivers/target/iscsi/iscsi_target_util.h index a2c2401f2945..8ee1c133a9b7 100644 --- a/drivers/target/iscsi/iscsi_target_util.h +++ b/drivers/target/iscsi/iscsi_target_util.h @@ -40,7 +40,7 @@ extern void iscsit_free_queue_reqs_for_conn(struct iscsi_conn *); extern void iscsit_release_cmd(struct iscsi_cmd *); extern void __iscsit_free_cmd(struct iscsi_cmd *, bool); extern void iscsit_free_cmd(struct iscsi_cmd *, bool); -extern int iscsit_check_session_usage_count(struct iscsi_session *sess, bool can_sleep); +extern bool iscsit_check_session_usage_count(struct iscsi_session *sess, bool can_sleep); extern void iscsit_dec_session_usage_count(struct iscsi_session *); extern void iscsit_inc_session_usage_count(struct iscsi_session *); extern struct iscsi_conn *iscsit_get_conn_from_cid(struct iscsi_session *, u16); -- cgit v1.2.3-59-g8ed1b