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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>
This commit is contained in:
goggin, edward 2005-09-27 21:45:44 -07:00 committed by Linus Torvalds
parent 0f7347c20c
commit 269fd2a6f8
1 changed files with 9 additions and 0 deletions
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9
drivers/md/dm-ioctl.c
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@ -230,11 +230,20 @@ static int dm_hash_insert(const char *name, const char *uuid, struct mapped_devi
static void __hash_remove(struct hash_cell *hc)
{
struct dm_table *table;
/* remove from the dev hash */
list_del(&hc->uuid_list);
list_del(&hc->name_list);
unregister_with_devfs(hc);
dm_set_mdptr(hc->md, NULL);
table = dm_get_table(hc->md);
if (table) {
dm_table_event(table);
dm_table_put(table);
}
dm_put(hc->md);
if (hc->new_map)
dm_table_put(hc->new_map);