net/smc: llc_del_link_work and use the LLC flow for delete link

Introduce a work that is scheduled when a new DELETE_LINK LLC request is
received. The work will call either the SMC client or SMC server
DELETE_LINK processing.
And use the LLC flow framework to process incoming DELETE_LINK LLC
messages, scheduling the llc_del_link_work for those events.
With these changes smc_lgr_forget() is only called by one function and
can be migrated into smc_lgr_cleanup_early().

Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Reviewed-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 8 insertions, 14 deletions

diff --git a/net/smc/smc_core.c b/net/smc/smc_core.c
index 2f8faa9c9e8e..a964304283fa 100644
--- a/net/smc/smc_core.c
+++ b/net/smc/smc_core.c
@@ -193,12 +193,19 @@ static void smc_lgr_unregister_conn(struct smc_connection *conn)
 void smc_lgr_cleanup_early(struct smc_connection *conn)
 {
 	struct smc_link_group *lgr = conn->lgr;
+	struct list_head *lgr_list;
+	spinlock_t *lgr_lock;
 
 	if (!lgr)
 		return;
 
 	smc_conn_free(conn);
-	smc_lgr_forget(lgr);
+	lgr_list = smc_lgr_list_head(lgr, &lgr_lock);
+	spin_lock_bh(lgr_lock);
+	/* do not use this link group for new connections */
+	if (!list_empty(lgr_list))
+		list_del_init(lgr_list);
+	spin_unlock_bh(lgr_lock);
 	smc_lgr_schedule_free_work_fast(lgr);
 }
 
@@ -653,19 +660,6 @@ static void smc_lgr_free(struct smc_link_group *lgr)
 	kfree(lgr);
 }
 
-void smc_lgr_forget(struct smc_link_group *lgr)
-{
-	struct list_head *lgr_list;
-	spinlock_t *lgr_lock;
-
-	lgr_list = smc_lgr_list_head(lgr, &lgr_lock);
-	spin_lock_bh(lgr_lock);
-	/* do not use this link group for new connections */
-	if (!list_empty(lgr_list))
-		list_del_init(lgr_list);
-	spin_unlock_bh(lgr_lock);
-}
-
 static void smcd_unregister_all_dmbs(struct smc_link_group *lgr)
 {
 	int i;