From f8e0a68babae3f612799178c718ec5358eac41cf Mon Sep 17 00:00:00 2001 From: Karsten Graul Date: Wed, 2 Jun 2021 10:56:25 +0200 Subject: [PATCH 1/2] net/smc: avoid possible duplicate dmb unregistration smc_lgr_cleanup() calls smcd_unregister_all_dmbs() as part of the link group termination process. This is a leftover from the times when smc_lgr_cleanup() scheduled a worker to actually free the link group. Nowadays smc_lgr_cleanup() directly calls smc_lgr_free() without any delay so an earlier dmb unregistration is no longer needed. So remove smcd_unregister_all_dmbs() and the call to it. Signed-off-by: Karsten Graul Signed-off-by: David S. Miller --- net/smc/smc_core.c | 15 --------------- 1 file changed, 15 deletions(-) diff --git a/net/smc/smc_core.c b/net/smc/smc_core.c index 0df85a12651e..317bc2c90fab 100644 --- a/net/smc/smc_core.c +++ b/net/smc/smc_core.c @@ -1235,20 +1235,6 @@ static void smc_lgr_free(struct smc_link_group *lgr) kfree(lgr); } -static void smcd_unregister_all_dmbs(struct smc_link_group *lgr) -{ - int i; - - for (i = 0; i < SMC_RMBE_SIZES; i++) { - struct smc_buf_desc *buf_desc; - - list_for_each_entry(buf_desc, &lgr->rmbs[i], list) { - buf_desc->len += sizeof(struct smcd_cdc_msg); - smc_ism_unregister_dmb(lgr->smcd, buf_desc); - } - } -} - static void smc_sk_wake_ups(struct smc_sock *smc) { smc->sk.sk_write_space(&smc->sk); @@ -1285,7 +1271,6 @@ static void smc_lgr_cleanup(struct smc_link_group *lgr) { if (lgr->is_smcd) { smc_ism_signal_shutdown(lgr); - smcd_unregister_all_dmbs(lgr); } else { u32 rsn = lgr->llc_termination_rsn; From 5e4a43ceb22a6fd2d372fde923a6a95ef6728fd7 Mon Sep 17 00:00:00 2001 From: Julian Wiedmann Date: Wed, 2 Jun 2021 10:56:26 +0200 Subject: [PATCH 2/2] net/smc: no need to flush smcd_dev's event_wq before destroying it destroy_workqueue() already calls drain_workqueue(), which is a stronger variant of flush_workqueue(). Signed-off-by: Julian Wiedmann Signed-off-by: Karsten Graul Signed-off-by: David S. Miller --- net/smc/smc_ism.c | 1 - 1 file changed, 1 deletion(-) diff --git a/net/smc/smc_ism.c b/net/smc/smc_ism.c index 967712ba52a0..9cb2df289963 100644 --- a/net/smc/smc_ism.c +++ b/net/smc/smc_ism.c @@ -470,7 +470,6 @@ void smcd_unregister_dev(struct smcd_dev *smcd) mutex_unlock(&smcd_dev_list.mutex); smcd->going_away = 1; smc_smcd_terminate_all(smcd); - flush_workqueue(smcd->event_wq); destroy_workqueue(smcd->event_wq); device_del(&smcd->dev);