linux-kernel - [PATCH 4.19 14/49] i2c: i801: Exclude device from suspend direct complete optimization

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Date:   Mon, 12 Oct 2020 15:27:00 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Volker Rümelin <volker.ruemelin@...glemail.com>,
        Jean Delvare <jdelvare@...e.de>, Wolfram Sang <wsa@...nel.org>,
        "Nobuhiro Iwamatsu (CIP)" <nobuhiro1.iwamatsu@...hiba.co.jp>
Subject: [PATCH 4.19 14/49] i2c: i801: Exclude device from suspend direct complete optimization

From: Jean Delvare <jdelvare@...e.de>

commit 845b89127bc5458d0152a4d63f165c62a22fcb70 upstream.

By default, PCI drivers with runtime PM enabled will skip the calls
to suspend and resume on system PM. For this driver, we don't want
that, as we need to perform additional steps for system PM to work
properly on all systems. So instruct the PM core to not skip these
calls.

Fixes: a9c8088c7988 ("i2c: i801: Don't restore config registers on runtime PM")
Reported-by: Volker Rümelin <volker.ruemelin@...glemail.com>
Signed-off-by: Jean Delvare <jdelvare@...e.de>
Cc: stable@...r.kernel.org
Signed-off-by: Wolfram Sang <wsa@...nel.org>
[iwamatsu: Use DPM_FLAG_NEVER_SKIP instead of DPM_FLAG_NO_DIRECT_COMPLETE]
Signed-off-by: Nobuhiro Iwamatsu (CIP) <nobuhiro1.iwamatsu@...hiba.co.jp>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/i2c/busses/i2c-i801.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/i2c/busses/i2c-i801.c
+++ b/drivers/i2c/busses/i2c-i801.c
@@ -1698,6 +1698,7 @@ static int i801_probe(struct pci_dev *de
 
 	pci_set_drvdata(dev, priv);
 
+	dev_pm_set_driver_flags(&dev->dev, DPM_FLAG_NEVER_SKIP);
 	pm_runtime_set_autosuspend_delay(&dev->dev, 1000);
 	pm_runtime_use_autosuspend(&dev->dev);
 	pm_runtime_put_autosuspend(&dev->dev);