linux-kernel - [PATCH] scsi: Remove redundant 'flush

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Date:   Fri, 12 Nov 2021 17:39:33 +0100
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     anil.gurumurthy@...gic.com, sudarsana.kalluru@...gic.com,
        jejb@...ux.ibm.com, martin.petersen@...cle.com, satishkh@...co.com,
        sebaddel@...co.com, kartilak@...co.com, james.smart@...adcom.com,
        dick.kennedy@...adcom.com, njavali@...vell.com,
        mrangankar@...vell.com
Cc:     GR-QLogic-Storage-Upstream@...vell.com, linux-scsi@...r.kernel.org,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH] scsi: Remove redundant 'flush_workqueue()' calls

'destroy_workqueue()' already drains the queue before destroying it, so
there is no need to flush it explicitly.

Remove the redundant 'flush_workqueue()' calls.

This was generated with coccinelle:

@@
expression E;
@@
- 	flush_workqueue(E);
	destroy_workqueue(E);

Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
 drivers/scsi/bfa/bfad_im.c    | 1 -
 drivers/scsi/fnic/fnic_main.c | 4 +---
 drivers/scsi/lpfc/lpfc_init.c | 1 -
 drivers/scsi/qedi/qedi_main.c | 2 --
 drivers/scsi/qla2xxx/qla_os.c | 1 -
 5 files changed, 1 insertion(+), 8 deletions(-)

diff --git a/drivers/scsi/bfa/bfad_im.c b/drivers/scsi/bfa/bfad_im.c
index 759d2bb1ecdd..b5c1729974ac 100644
--- a/drivers/scsi/bfa/bfad_im.c
+++ b/drivers/scsi/bfa/bfad_im.c
@@ -756,7 +756,6 @@ void
 bfad_destroy_workq(struct bfad_im_s *im)
 {
 	if (im && im->drv_workq) {
-		flush_workqueue(im->drv_workq);
 		destroy_workqueue(im->drv_workq);
 		im->drv_workq = NULL;
 	}
diff --git a/drivers/scsi/fnic/fnic_main.c b/drivers/scsi/fnic/fnic_main.c
index 44dbaa662d94..806aaf411d10 100644
--- a/drivers/scsi/fnic/fnic_main.c
+++ b/drivers/scsi/fnic/fnic_main.c
@@ -1145,10 +1145,8 @@ static void __exit fnic_cleanup_module(void)
 {
 	pci_unregister_driver(&fnic_driver);
 	destroy_workqueue(fnic_event_queue);
-	if (fnic_fip_queue) {
-		flush_workqueue(fnic_fip_queue);
+	if (fnic_fip_queue)
 		destroy_workqueue(fnic_fip_queue);
-	}
 	kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);
 	kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);
 	kmem_cache_destroy(fnic_io_req_cache);
diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index ba17a8f740a9..93decd6c7ab1 100644
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -8529,7 +8529,6 @@ static void
 lpfc_unset_driver_resource_phase2(struct lpfc_hba *phba)
 {
 	if (phba->wq) {
-		flush_workqueue(phba->wq);
 		destroy_workqueue(phba->wq);
 		phba->wq = NULL;
 	}
diff --git a/drivers/scsi/qedi/qedi_main.c b/drivers/scsi/qedi/qedi_main.c
index 1dec814d8788..542dde3a1cfd 100644
--- a/drivers/scsi/qedi/qedi_main.c
+++ b/drivers/scsi/qedi/qedi_main.c
@@ -2422,13 +2422,11 @@ static void __qedi_remove(struct pci_dev *pdev, int mode)
 		iscsi_host_remove(qedi->shost);
 
 		if (qedi->tmf_thread) {
-			flush_workqueue(qedi->tmf_thread);
 			destroy_workqueue(qedi->tmf_thread);
 			qedi->tmf_thread = NULL;
 		}
 
 		if (qedi->offload_thread) {
-			flush_workqueue(qedi->offload_thread);
 			destroy_workqueue(qedi->offload_thread);
 			qedi->offload_thread = NULL;
 		}
diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index abcd30917263..9f9d2f075bbe 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -3922,7 +3922,6 @@ qla2x00_free_device(scsi_qla_host_t *vha)
 
 	/* Flush the work queue and remove it */
 	if (ha->wq) {
-		flush_workqueue(ha->wq);
 		destroy_workqueue(ha->wq);
 		ha->wq = NULL;
 	}
-- 
2.30.2