PM / hibernate: Fix restore hang in freeze_processes()
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.capella@linaro.org> Acked-by:
Ming Lei <ming.lei@canonical.com> Cc: All applicable <stable@vger.kernel.org> Signed-off-by:
Rafael J. Wysocki <rafael.j.wysocki@intel.com>
parent
cfbf8d48
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