| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.19 026/116] mei: request autosuspend after sending rx flow control | Date | Mon, 31 May 2021 15:13:22 +0200 |
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From: Alexander Usyskin <alexander.usyskin@intel.com>
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@vger.kernel.org> Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Link: https://lore.kernel.org/r/20210526193334.445759-1-tomas.winkler@intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- drivers/misc/mei/interrupt.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/drivers/misc/mei/interrupt.c +++ b/drivers/misc/mei/interrupt.c @@ -224,6 +224,9 @@ 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;
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