diff options
authorJames Hogan <james.hogan@imgtec.com>2013-01-25 10:13:59 +0000
committerTejun Heo <tj@kernel.org>2013-01-25 09:14:48 -0800
commita0327ff0eda915be623658babacef706099c11a8 (patch)
parent9fdb04cdc5566d6ba68283a0bebe49667ca0b0e8 (diff)
async: initialise list heads to fix crash
9fdb04cdc55 ("async: replace list of active domains with global list of pending items") added a struct list_head global_list in struct async_entry, which isn't initialised. This means that if !domain->registered at __async_schedule(), then list_del_init() will be called on the list head in async_run_entry_fn with both pointers NULL, causing a crash. This is fixed by initialising both the global_list and domain_list list_heads after kzalloc'ing the entry. This was noticed due to dapm_power_widgets() which uses ASYNC_DOMAIN_EXCLUSIVE, which initialises the domain->registered to 0. Signed-off-by: James Hogan <james.hogan@imgtec.com> Signed-off-by: Tejun Heo <tj@kernel.org> Reported-by: James Hogan <james.hogan@imgtec.com> Reported-by: Stephen Warren <swarren@wwwdotorg.org>
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/async.c b/kernel/async.c
index 6958000eeb4..8ddee2c3e5b 100644
--- a/kernel/async.c
+++ b/kernel/async.c
@@ -172,6 +172,8 @@ static async_cookie_t __async_schedule(async_func_ptr *ptr, void *data, struct a
ptr(data, newcookie);
return newcookie;
+ INIT_LIST_HEAD(&entry->domain_list);
+ INIT_LIST_HEAD(&entry->global_list);
INIT_WORK(&entry->work, async_run_entry_fn);
entry->func = ptr;
entry->data = data;