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Date: Fri, 25 Jan 2013 10:13:59 +0000 From: James Hogan <james.hogan@...tec.com> To: Tejun Heo <tj@...nel.org> CC: Linus Torvalds <torvalds@...ux-foundation.org>, Arjan van de Ven <arjan@...ux.intel.com>, Dan Williams <djbw@...com>, <linux-kernel@...r.kernel.org>, James Hogan <james.hogan@...tec.com> Subject: [PATCH 1/1] async: initialise list heads to fix crash The commit "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@...tec.com> --- kernel/async.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/kernel/async.c b/kernel/async.c index 6958000..8ddee2c 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; -- 1.7.7.6 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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