Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=c7ac86de6a1bcb1b59c83e19b0d0d64a59604ade
Commit: c7ac86de6a1bcb1b59c83e19b0d0d64a59604ade
Parent: 60812a4a99b796d894d2522dc63cb0fafc3be25e
Author: Bryn M. Reeves <[EMAIL PROTECTED]>
AuthorDate: Fri Oct 19 22:29:32 2007 +0100
Committer: Alasdair G Kergon <[EMAIL PROTECTED]>
CommitDate: Sat Oct 20 02:00:57 2007 +0100
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 <[EMAIL PROTECTED]>
Signed-off-by: Alasdair G Kergon <[EMAIL PROTECTED]>
---
drivers/md/dm-mpath-rdac.c | 15 ++++++++-------
1 files changed, 8 insertions(+), 7 deletions(-)
diff --git a/drivers/md/dm-mpath-rdac.c b/drivers/md/dm-mpath-rdac.c
index 16b1613..e04eb5c 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;
}
-
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