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| author | Sebastian Capella <sebastian.capella@linaro.org> | 2014-02-18 17:52:08 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-03-06 22:06:29 -0800 |
| commit | e5b0fd691249908917e96659c03f2bc5869ed249 (patch) | |
| tree | ec3a5788fc43000be965c7b50325b891d1c6e514 /Documentation/module-signing.txt | |
| parent | d8c2a97e20d1c4e726c21b2eac32a0258ff9ede0 (diff) | |
| download | lwn-e5b0fd691249908917e96659c03f2bc5869ed249.tar.gz lwn-e5b0fd691249908917e96659c03f2bc5869ed249.zip | |
PM / hibernate: Fix restore hang in freeze_processes()
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.capella@linaro.org>
Acked-by: Ming Lei <ming.lei@canonical.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/module-signing.txt')
0 files changed, 0 insertions, 0 deletions