From: Dmitry Monakhov <dmonakhov@xxxxxxxxxx>
Add missing 'dm_io_client_destroy' to alloc_context error path.
Reorganize mirror constructor error path in order to prevent
workqueue leakage.
Signed-off-by: Dmitry Monakhov <dmonakhov@xxxxxxxxxx>
Signed-off-by: Alasdair G Kergon <agk@xxxxxxxxxx>
---
drivers/md/dm-raid1.c | 28 +++++++++++++++-------------
1 files changed, 15 insertions(+), 13 deletions(-)
Index: linux-2.6.23/drivers/md/dm-raid1.c
===================================================================
--- linux-2.6.23.orig/drivers/md/dm-raid1.c 2007-10-12 13:15:18.000000000 +0100
+++ linux-2.6.23/drivers/md/dm-raid1.c 2007-10-12 13:15:32.000000000 +0100
@@ -974,6 +974,7 @@ static struct mirror_set *alloc_context(
if (rh_init(&ms->rh, ms, dl, region_size, ms->nr_regions)) {
ti->error = "Error creating dirty region hash";
+ dm_io_client_destroy(ms->io_client);
kfree(ms);
return NULL;
}
@@ -1163,16 +1164,14 @@ static int mirror_ctr(struct dm_target *
ms->kmirrord_wq = create_singlethread_workqueue("kmirrord");
if (!ms->kmirrord_wq) {
DMERR("couldn't start kmirrord");
- free_context(ms, ti, m);
- return -ENOMEM;
+ r = -ENOMEM;
+ goto err_free_context;
}
INIT_WORK(&ms->kmirrord_work, do_mirror);
r = parse_features(ms, argc, argv, &args_used);
- if (r) {
- free_context(ms, ti, ms->nr_mirrors);
- return r;
- }
+ if (r)
+ goto err_destroy_wq;
argv += args_used;
argc -= args_used;
@@ -1188,19 +1187,22 @@ static int mirror_ctr(struct dm_target *
if (argc) {
ti->error = "Too many mirror arguments";
- free_context(ms, ti, ms->nr_mirrors);
- return -EINVAL;
+ r = -EINVAL;
+ goto err_destroy_wq;
}
r = kcopyd_client_create(DM_IO_PAGES, &ms->kcopyd_client);
- if (r) {
- destroy_workqueue(ms->kmirrord_wq);
- free_context(ms, ti, ms->nr_mirrors);
- return r;
- }
+ if (r)
+ goto err_destroy_wq;
wake(ms);
return 0;
+
+err_destroy_wq:
+ destroy_workqueue(ms->kmirrord_wq);
+err_free_context:
+ free_context(ms, ti, ms->nr_mirrors);
+ return r;
}
static void mirror_dtr(struct dm_target *ti)
--
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