From: Tomas Winkler <tomas.winkler@intel.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Alexander Usyskin <alexander.usyskin@intel.com>,
linux-kernel@vger.kernel.org, stable@vger.kernel.org,
Tomas Winkler <tomas.winkler@intel.com>
Subject: [char-misc-next] mei: request autosuspend after sending rx flow control
Date: Wed, 26 May 2021 22:33:34 +0300 [thread overview]
Message-ID: <20210526193334.445759-1-tomas.winkler@intel.com> (raw)
From: Alexander Usyskin <alexander.usyskin@intel.com>
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>
---
drivers/misc/mei/interrupt.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/misc/mei/interrupt.c b/drivers/misc/mei/interrupt.c
index a98f6b895af7..aab3ebfa9fc4 100644
--- a/drivers/misc/mei/interrupt.c
+++ b/drivers/misc/mei/interrupt.c
@@ -277,6 +277,9 @@ static int mei_cl_irq_read(struct mei_cl *cl, struct mei_cl_cb *cb,
return ret;
}
+ pm_runtime_mark_last_busy(dev->dev);
+ pm_request_autosuspend(dev->dev);
+
list_move_tail(&cb->list, &cl->rd_pending);
return 0;
--
2.31.1
reply other threads:[~2021-05-26 19:33 UTC|newest]
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