From c7ac86de6a1bcb1b59c83e19b0d0d64a59604ade Mon Sep 17 00:00:00 2001 From: "Bryn M. Reeves" Date: Fri, 19 Oct 2007 22:29:32 +0100 Subject: [PATCH] dm mpath: rdac fix init race Re-order the initialisation of dm-rdac to avoid registering the hw handler before the workqueue has been initialised. Closes a race that would potentially give an oops. Signed-off-by: Bryn M. Reeves Signed-off-by: Alasdair G Kergon --- drivers/md/dm-mpath-rdac.c | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-) diff --git a/drivers/md/dm-mpath-rdac.c b/drivers/md/dm-mpath-rdac.c index 16b161345775..e04eb5c697fb 100644 --- a/drivers/md/dm-mpath-rdac.c +++ b/drivers/md/dm-mpath-rdac.c @@ -664,20 +664,21 @@ static struct hw_handler_type rdac_handler = { static int __init rdac_init(void) { - int r = dm_register_hw_handler(&rdac_handler); - - if (r < 0) { - DMERR("%s: register failed %d", RDAC_DM_HWH_NAME, r); - return r; - } + int r; rdac_wkqd = create_singlethread_workqueue("rdac_wkqd"); if (!rdac_wkqd) { DMERR("Failed to create workqueue rdac_wkqd."); - dm_unregister_hw_handler(&rdac_handler); return -ENOMEM; } + r = dm_register_hw_handler(&rdac_handler); + if (r < 0) { + DMERR("%s: register failed %d", RDAC_DM_HWH_NAME, r); + destroy_workqueue(rdac_wkqd); + return r; + } + DMINFO("%s: version %s loaded", RDAC_DM_HWH_NAME, RDAC_DM_HWH_VER); return 0; } -- 2.30.2