[3.16.y-ckt stable] Patch "mei: me: release hw from reset only during the reset flow" has been added to staging queue

Luis Henriques luis.henriques at canonical.com
Mon Mar 2 13:35:26 UTC 2015

This is a note to let you know that I have just added a patch titled

    mei: me: release hw from reset only during the reset flow

to the linux-3.16.y-queue branch of the 3.16.y-ckt extended stable tree 
which can be found at:


This patch is scheduled to be released in version 3.16.7-ckt8.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.16.y-ckt tree, see



>From f4d1740859daedf8e1cf2bea495f9c7483863eca Mon Sep 17 00:00:00 2001
From: Alexander Usyskin <alexander.usyskin at intel.com>
Date: Sun, 25 Jan 2015 23:45:28 +0200
Subject: mei: me: release hw from reset only during the reset flow

commit 663b7ee9517eec6deea9a48c7a1392a9a34f7809 upstream.

We might enter the interrupt handler with hw_ready already set,
but prior we actually started the reset flow.
To soleve this we move the reset release from the interrupt handler
to the HW start wait function which is part of the reset sequence.

Signed-off-by: Alexander Usyskin <alexander.usyskin at intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler at intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
[ luis: backported to 3.16: adjusted context ]
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
 drivers/misc/mei/hw-me.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c
index 98bc7e05b97b..5fcd1d69debc 100644
--- a/drivers/misc/mei/hw-me.c
+++ b/drivers/misc/mei/hw-me.c
@@ -293,6 +293,7 @@ static int mei_me_hw_ready_wait(struct mei_device *dev)
 		return err;

+	mei_me_hw_reset_release(dev);
 	dev->recvd_hw_ready = false;
 	return 0;
@@ -672,7 +673,6 @@ irqreturn_t mei_me_irq_thread_handler(int irq, void *dev_id)
 	/*  check if we need to start the dev */
 	if (!mei_host_is_ready(dev)) {
 		if (mei_hw_is_ready(dev)) {
-			mei_me_hw_reset_release(dev);
 			dev_dbg(&dev->pdev->dev, "we need to start the dev.\n");

 			dev->recvd_hw_ready = true;

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