[PATCH 04/13] xfs_scrub: redistribute read verify pool flush and destroy responsibilities

["Darrick J. Wong" <darrick.wong@xxxxxxxxxx>]

From: Darrick J. Wong <darrick.wong@xxxxxxxxxx>

Since workqueues now have separate primitives for "wait for all queued
work" and "destroy workqueue", it makes more sense for the read verify
pool code to call the workqueue destructor from its own destructor
function.

Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
 scrub/phase6.c      |    9 +++++++--
 scrub/read_verify.c |    2 +-
 2 files changed, 8 insertions(+), 3 deletions(-)


diff --git a/scrub/phase6.c b/scrub/phase6.c
index b41f90e0..aff04e76 100644
--- a/scrub/phase6.c
+++ b/scrub/phase6.c
@@ -511,12 +511,17 @@ _("Could not create data device media verifier."));
 	return moveon;
 
 out_rtpool:
-	if (vs.rvp_realtime)
+	if (vs.rvp_realtime) {
+		read_verify_pool_flush(vs.rvp_realtime);
 		read_verify_pool_destroy(vs.rvp_realtime);
+	}
 out_logpool:
-	if (vs.rvp_log)
+	if (vs.rvp_log) {
+		read_verify_pool_flush(vs.rvp_log);
 		read_verify_pool_destroy(vs.rvp_log);
+	}
 out_datapool:
+	read_verify_pool_flush(vs.rvp_data);
 	read_verify_pool_destroy(vs.rvp_data);
 out_rbad:
 	bitmap_free(&vs.r_bad);
diff --git a/scrub/read_verify.c b/scrub/read_verify.c
index bb8f09a8..e59d3e67 100644
--- a/scrub/read_verify.c
+++ b/scrub/read_verify.c
@@ -121,7 +121,6 @@ read_verify_pool_flush(
 	struct read_verify_pool		*rvp)
 {
 	workqueue_terminate(&rvp->wq);
-	workqueue_destroy(&rvp->wq);
 }
 
 /* Finish up any read verification work and tear it down. */
@@ -129,6 +128,7 @@ void
 read_verify_pool_destroy(
 	struct read_verify_pool		*rvp)
 {
+	workqueue_destroy(&rvp->wq);
 	ptvar_free(rvp->rvstate);
 	ptcounter_free(rvp->verified_bytes);
 	free(rvp->readbuf);