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dm snapshot: free exception store on init failure

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While initializing the snapshot module, if we fail to register
the snapshot target then we must back-out the exception store
module initialization.

Cc: stable@kernel.org
Signed-off-by: Jonathan Brassow <jbrassow@redhat.com>
Reviewed-by: Mikulas Patocka <mpatocka@redhat.com>
Reviewed-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
This commit is contained in:
Jonathan Brassow 2009-10-16 23:18:14 +01:00 committed by Alasdair G Kergon
parent 6d45d93ead
commit 034a186d29
1 changed files with 4 additions and 1 deletions
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5
drivers/md/dm-snap.c
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@ -1470,7 +1470,7 @@ static int __init dm_snapshot_init(void)
r = dm_register_target(&snapshot_target); r = dm_register_target(&snapshot_target);
if (r) { if (r) {
DMERR("snapshot target register failed %d", r); DMERR("snapshot target register failed %d", r);
return r; goto bad_register_snapshot_target;
} }
r = dm_register_target(&origin_target); r = dm_register_target(&origin_target);
@ -1527,6 +1527,9 @@ bad2:
dm_unregister_target(&origin_target); dm_unregister_target(&origin_target);
bad1: bad1:
dm_unregister_target(&snapshot_target); dm_unregister_target(&snapshot_target);
bad_register_snapshot_target:
dm_exception_store_exit();
return r; return r;
} }