linux-kernel - [PATCH 5.15 236/262] drm/bridge: ti-sn65dsi86: Properly undo autosuspend

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Date:   Mon,  7 Mar 2022 10:19:40 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Douglas Anderson <dianders@...omium.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.15 236/262] drm/bridge: ti-sn65dsi86: Properly undo autosuspend

From: Douglas Anderson <dianders@...omium.org>

[ Upstream commit 26d3474348293dc752c55fe6d41282199f73714c ]

The PM Runtime docs say:
  Drivers in ->remove() callback should undo the runtime PM changes done
  in ->probe(). Usually this means calling pm_runtime_disable(),
  pm_runtime_dont_use_autosuspend() etc.

We weren't doing that for autosuspend. Let's do it.

Fixes: 9bede63127c6 ("drm/bridge: ti-sn65dsi86: Use pm_runtime autosuspend")
Signed-off-by: Douglas Anderson <dianders@...omium.org>
Reviewed-by: Linus Walleij <linus.walleij@...aro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220222141838.1.If784ba19e875e8ded4ec4931601ce6d255845245@changeid
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/bridge/ti-sn65dsi86.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
index 4d08246f930c..45a5f1e48f0e 100644
--- a/drivers/gpu/drm/bridge/ti-sn65dsi86.c
+++ b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
@@ -1473,6 +1473,7 @@ static inline void ti_sn_gpio_unregister(void) {}
 
 static void ti_sn65dsi86_runtime_disable(void *data)
 {
+	pm_runtime_dont_use_autosuspend(data);
 	pm_runtime_disable(data);
 }
 
@@ -1532,11 +1533,11 @@ static int ti_sn65dsi86_probe(struct i2c_client *client,
 				     "failed to get reference clock\n");
 
 	pm_runtime_enable(dev);
+	pm_runtime_set_autosuspend_delay(pdata->dev, 500);
+	pm_runtime_use_autosuspend(pdata->dev);
 	ret = devm_add_action_or_reset(dev, ti_sn65dsi86_runtime_disable, dev);
 	if (ret)
 		return ret;
-	pm_runtime_set_autosuspend_delay(pdata->dev, 500);
-	pm_runtime_use_autosuspend(pdata->dev);
 
 	ti_sn65dsi86_debugfs_init(pdata);
 
-- 
2.34.1