usb: 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);

Acked-by: Shuah Khan <skhan@linuxfoundation.org>
Acked-by: Peter Chen <peter.chen@kernel.or> # for chipidea part
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/563123a8117d6cafae3f134e497587bd2b8bb7f4.1636734453.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/chipidea/otg.c b/drivers/usb/chipidea/otg.c
index 8dd5928..7b53274 100644 (file)
--- a/drivers/usb/chipidea/otg.c
+++ b/drivers/usb/chipidea/otg.c
@@ -255,10 +255,9 @@ int ci_hdrc_otg_init(struct ci_hdrc *ci)
  */
 void ci_hdrc_otg_destroy(struct ci_hdrc *ci)
 {
-       if (ci->wq) {
-               flush_workqueue(ci->wq);
+       if (ci->wq)
                destroy_workqueue(ci->wq);
-       }
+
        /* Disable all OTG irq and clear status */
        hw_write_otgsc(ci, OTGSC_INT_EN_BITS | OTGSC_INT_STATUS_BITS,
                                                OTGSC_INT_STATUS_BITS);

diff --git a/drivers/usb/gadget/udc/mv_udc_core.c b/drivers/usb/gadget/udc/mv_udc_core.c
index 7f24ce4..b6d34dd 100644 (file)
--- a/drivers/usb/gadget/udc/mv_udc_core.c
+++ b/drivers/usb/gadget/udc/mv_udc_core.c
@@ -2084,10 +2084,8 @@ static int mv_udc_remove(struct platform_device *pdev)
 
        usb_del_gadget_udc(&udc->gadget);
 
-       if (udc->qwork) {
-               flush_workqueue(udc->qwork);
+       if (udc->qwork)
                destroy_workqueue(udc->qwork);
-       }
 
        /* free memory allocated in probe */
        dma_pool_destroy(udc->dtd_pool);

diff --git a/drivers/usb/host/u132-hcd.c b/drivers/usb/host/u132-hcd.c
index ae882d7..d879d6a 100644 (file)
--- a/drivers/usb/host/u132-hcd.c
+++ b/drivers/usb/host/u132-hcd.c
@@ -3211,7 +3211,6 @@ static void __exit u132_hcd_exit(void)
        platform_driver_unregister(&u132_platform_driver);
        printk(KERN_INFO "u132-hcd driver deregistered\n");
        wait_event(u132_hcd_wait, u132_instances == 0);
-       flush_workqueue(workqueue);
        destroy_workqueue(workqueue);
 }
 

diff --git a/drivers/usb/phy/phy-mv-usb.c b/drivers/usb/phy/phy-mv-usb.c
index 576d925..86503b7 100644 (file)
--- a/drivers/usb/phy/phy-mv-usb.c
+++ b/drivers/usb/phy/phy-mv-usb.c
@@ -648,10 +648,8 @@ static int mv_otg_remove(struct platform_device *pdev)
 {
        struct mv_otg *mvotg = platform_get_drvdata(pdev);
 
-       if (mvotg->qwork) {
-               flush_workqueue(mvotg->qwork);
+       if (mvotg->qwork)
                destroy_workqueue(mvotg->qwork);
-       }
 
        mv_otg_disable(mvotg);
 
@@ -825,7 +823,6 @@ static int mv_otg_probe(struct platform_device *pdev)
 err_disable_clk:
        mv_otg_disable_internal(mvotg);
 err_destroy_workqueue:
-       flush_workqueue(mvotg->qwork);
        destroy_workqueue(mvotg->qwork);
 
        return retval;

diff --git a/drivers/usb/usbip/usbip_event.c b/drivers/usb/usbip/usbip_event.c
index 086ca76..2651354 100644 (file)
--- a/drivers/usb/usbip/usbip_event.c
+++ b/drivers/usb/usbip/usbip_event.c
@@ -137,7 +137,6 @@ int usbip_init_eh(void)
 
 void usbip_finish_eh(void)
 {
-       flush_workqueue(usbip_queue);
        destroy_workqueue(usbip_queue);
        usbip_queue = NULL;
 }