From: James Hogan Date: Fri, 25 Jan 2013 10:13:59 +0000 (+0000) Subject: async: initialise list heads to fix crash X-Git-Tag: next-20130218~33^2~5^2 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=a0327ff0eda915be623658babacef706099c11a8;p=karo-tx-linux.git 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 Signed-off-by: Tejun Heo Reported-by: James Hogan Reported-by: Stephen Warren --- diff --git a/kernel/async.c b/kernel/async.c index 6958000eeb44..8ddee2c3e5b0 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;