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[PATCH] device-mapper: Trigger an event when a table is deleted
If anything is waiting on a device's table when the device is removed, we must first wake it up so it will release its reference. Otherwise the table's reference count will not drop to zero and the table will not get removed. Signed-Off-By: Alasdair G Kergon <agk@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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@ -230,11 +230,20 @@ static int dm_hash_insert(const char *name, const char *uuid, struct mapped_devi
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static void __hash_remove(struct hash_cell *hc)
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{
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struct dm_table *table;
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/* remove from the dev hash */
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list_del(&hc->uuid_list);
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list_del(&hc->name_list);
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unregister_with_devfs(hc);
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dm_set_mdptr(hc->md, NULL);
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table = dm_get_table(hc->md);
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if (table) {
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dm_table_event(table);
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dm_table_put(table);
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}
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dm_put(hc->md);
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if (hc->new_map)
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dm_table_put(hc->new_map);
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