From: Alexander Usyskin <alexander.usyskin@xxxxxxxxx> commit bbf0a94744edfeee298e4a9ab6fd694d639a5cdf upstream. A rx flow control waiting in the control queue may block autosuspend. Re-request autosuspend after flow control been sent to unblock the transition to the low power state. Cc: <stable@xxxxxxxxxxxxxxx> Signed-off-by: Alexander Usyskin <alexander.usyskin@xxxxxxxxx> Signed-off-by: Tomas Winkler <tomas.winkler@xxxxxxxxx> Link: https://lore.kernel.org/r/20210526193334.445759-1-tomas.winkler@xxxxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/misc/mei/interrupt.c | 3 +++ 1 file changed, 3 insertions(+) --- a/drivers/misc/mei/interrupt.c +++ b/drivers/misc/mei/interrupt.c @@ -220,6 +220,9 @@ static int mei_cl_irq_read(struct mei_cl return ret; } + pm_runtime_mark_last_busy(dev->dev); + pm_request_autosuspend(dev->dev); + list_move_tail(&cb->list, &cl->rd_pending); return 0;
