linux-kernel - [PATCH AUTOSEL 4.14 2/5] mei: me: set internal pg flag to off on hardware reset

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Message-Id: <20220621205140.250968-2-sashal@kernel.org>
Date:   Tue, 21 Jun 2022 16:51:36 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Alexander Usyskin <alexander.usyskin@...el.com>,
        Tomas Winkler <tomas.winkler@...el.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH AUTOSEL 4.14 2/5] mei: me: set internal pg flag to off on hardware reset

From: Alexander Usyskin <alexander.usyskin@...el.com>

[ Upstream commit 9f4639373e6756e1ccf0029f861f1061db3c3616 ]

Link reset flow is always performed in the runtime resumed state.
The internal PG state may be left as ON after the suspend
and will not be updated upon the resume if the D0i3 is not supported.

Ensure that the internal PG state is set to the right value on the flow
entrance in case the firmware does not support D0i3.

Signed-off-by: Alexander Usyskin <alexander.usyskin@...el.com>
Signed-off-by: Tomas Winkler <tomas.winkler@...el.com>
Link: https://lore.kernel.org/r/20220606144225.282375-1-tomas.winkler@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/misc/mei/hw-me.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c
index 10dcf4ff99a5..7a708c58e435 100644
--- a/drivers/misc/mei/hw-me.c
+++ b/drivers/misc/mei/hw-me.c
@@ -1125,6 +1125,8 @@ static int mei_me_hw_reset(struct mei_device *dev, bool intr_enable)
 			ret = mei_me_d0i3_exit_sync(dev);
 			if (ret)
 				return ret;
+		} else {
+			hw->pg_state = MEI_PG_OFF;
 		}
 	}
 
-- 
2.35.1