[Drbd-dev] [PATCH] drbd: destroy workqueue when drbd device was freed

[Wang ShaoBo]

A submitter workqueue is dynamically allocated by init_submitter()
called by drbd_create_device(), we should destroy it when this
device was not needed or destroyed.

Fixes: 113fef9e20e0 ("drbd: prepare to queue write requests on a submit worker")
Signed-off-by: Wang ShaoBo <bobo.shaobowang at huawei.com>
---
 drivers/block/drbd/drbd_main.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index 8532b839a343..467c498e3add 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -2218,6 +2218,9 @@ void drbd_destroy_device(struct kref *kref)
 		kfree(peer_device);
 	}
 	memset(device, 0xfd, sizeof(*device));
+
+	if (device->submit.wq)
+		destroy_workqueue(device->submit.wq);
 	kfree(device);
 	kref_put(&resource->kref, drbd_destroy_resource);
 }
@@ -2810,6 +2813,8 @@ enum drbd_ret_code drbd_create_device(struct drbd_config_context *adm_ctx, unsig
 	put_disk(disk);
 out_no_disk:
 	kref_put(&resource->kref, drbd_destroy_resource);
+	if (device->submit.wq)
+		destroy_workqueue(device->submit.wq);
 	kfree(device);
 	return err;
 }
-- 
2.25.1