From d5f8e166c25750adc147b0adf64a62a91653438a Mon Sep 17 00:00:00 2001 From: Alexander Usyskin Date: Thu, 24 Nov 2016 13:34:02 +0200 Subject: [PATCH] mei: request async autosuspend at the end of enumeration 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. Cc: # 4.4+ Signed-off-by: Alexander Usyskin Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/client.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/misc/mei/client.c b/drivers/misc/mei/client.c index 9635b14b6011..391936c1aa04 100644 --- a/drivers/misc/mei/client.c +++ b/drivers/misc/mei/client.c @@ -691,7 +691,7 @@ void mei_host_client_init(struct mei_device *dev) pm_runtime_mark_last_busy(dev->dev); dev_dbg(dev->dev, "rpm: autosuspend\n"); - pm_runtime_autosuspend(dev->dev); + pm_request_autosuspend(dev->dev); } /** -- 2.20.1