linux-kernel - [char-misc-next 1/3] mei: me: set internal pg flag to off on hardware reset

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Date:   Mon,  6 Jun 2022 17:42:23 +0300
From:   Tomas Winkler <tomas.winkler@...el.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Alexander Usyskin <alexander.usyskin@...el.com>,
        Vitaly Lubart <vitaly.lubart@...el.com>,
        linux-kernel@...r.kernel.org,
        Tomas Winkler <tomas.winkler@...el.com>
Subject: [char-misc-next 1/3] mei: me: set internal pg flag to off on hardware reset

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

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>
---
 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 9870bf717979..befa491e3344 100644
--- a/drivers/misc/mei/hw-me.c
+++ b/drivers/misc/mei/hw-me.c
@@ -1154,6 +1154,8 @@ 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;
 		}
 	}
 
-- 
2.35.3