linuxmsm/laptops-kernel
0
0
Fork 0
mirror of https://github.com/linux-msm/laptops-kernel.git synced 2026-08-13 14:19:53 -07:00
Code Issues Packages Projects Releases Wiki Activity

PM: wakeup: Handle empty list in wakeup_sources_walk_start()

Browse Source 
In the case of an empty wakeup_sources list, wakeup_sources_walk_start()
will return an invalid but non-NULL address. This also affects wrappers
of the aforementioned function, like for_each_wakeup_source().

Update wakeup_sources_walk_start() to return NULL in case of an empty
list.

Fixes: b4941adb24 ("PM: wakeup: Add routine to help fetch wakeup source object.")
Signed-off-by: Samuel Wu <wusamuel@google.com>
[ rjw: Subject and changelog edits ]
Link: https://patch.msgid.link/20260124012133.2451708-2-wusamuel@google.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Samuel Wu
2026-02-02 21:39:21 +01:00
committed by Rafael J. Wysocki
parent 1081c1649d
commit 75ce02f4bc
1 changed files with 1 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/base/power/wakeup.c
+1 -3
View File
@@ -275,9 +275,7 @@ EXPORT_SYMBOL_GPL(wakeup_sources_read_unlock);
*/
struct wakeup_source *wakeup_sources_walk_start(void)
{
struct list_head *ws_head = &wakeup_sources;
return list_entry_rcu(ws_head->next, struct wakeup_source, entry);
return list_first_or_null_rcu(&wakeup_sources, struct wakeup_source, entry);
}
EXPORT_SYMBOL_GPL(wakeup_sources_walk_start);