3.8.13.20 -stable review patch. If anyone has any objections, please let me
know.
------------------
From: Sebastian Capella <sebastian.cape...@linaro.org>
commit f8d5b9e9e5372f0deb7bc1ab1088a9b60b0a793d upstream.
During restore, pm_notifier chain are called with
PM_RESTORE_PREPARE. The firmware_class driver handler
fw_pm_notify does not have a handler for this. As a result,
it keeps a reader on the kmod.c umhelper_sem. During
freeze_processes, the call to __usermodehelper_disable tries to
take a write lock on this semaphore and hangs waiting.
Signed-off-by: Sebastian Capella <sebastian.cape...@linaro.org>
Acked-by: Ming Lei <ming....@canonical.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wyso...@intel.com>
Signed-off-by: Kamal Mostafa <ka...@canonical.com>
---
drivers/base/firmware_class.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c
index b392b35..abb2054 100644
--- a/drivers/base/firmware_class.c
+++ b/drivers/base/firmware_class.c
@@ -1413,6 +1413,7 @@ static int fw_pm_notify(struct notifier_block
*notify_block,
switch (mode) {
case PM_HIBERNATION_PREPARE:
case PM_SUSPEND_PREPARE:
+ case PM_RESTORE_PREPARE:
device_cache_fw_images();
break;
--
1.8.3.2
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