Commit abb78811 authored by Alexander Usyskin's avatar Alexander Usyskin Committed by Greg Kroah-Hartman

mei: request async autosuspend at the end of enumeration

commit d5f8e166 upstream.

pm_runtime_autosuspend can take synchronous or asynchronous
paths, Because we are calling pm_runtime_mark_last_busy just before
this most of the cases it takes the asynchronous way. However,
when the FW or driver resets during already running runtime suspend,
the call will result in calling to the driver's rpm callback and results
in a deadlock on device_lock.
The simplest fix is to replace pm_runtime_autosuspend with
asynchronous pm_request_autosuspend.
Signed-off-by: default avatarAlexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: default avatarTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 1f9c91a3
......@@ -698,7 +698,7 @@ void mei_host_client_init(struct work_struct *work)
pm_runtime_mark_last_busy(dev->dev);
dev_dbg(dev->dev, "rpm: autosuspend\n");
pm_runtime_autosuspend(dev->dev);
pm_request_autosuspend(dev->dev);
}
/**
......
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