dm snapshot: free exception store on init failure
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>
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@ -1470,7 +1470,7 @@ static int __init dm_snapshot_init(void)
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r = dm_register_target(&snapshot_target);
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if (r) {
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DMERR("snapshot target register failed %d", r);
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return r;
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goto bad_register_snapshot_target;
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}
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r = dm_register_target(&origin_target);
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@ -1527,6 +1527,9 @@ bad2:
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dm_unregister_target(&origin_target);
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bad1:
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dm_unregister_target(&snapshot_target);
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bad_register_snapshot_target:
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dm_exception_store_exit();
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return r;
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}
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