linux-kernel - [PATCH 5.15 380/913] drm/bridge: nwl-dsi: Fix PM disable depth imbalance in nwl_dsi

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Message-Id: <20220405070351.238496841@linuxfoundation.org>
Date:   Tue,  5 Apr 2022 09:24:02 +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, Miaoqian Lin <linmq006@...il.com>,
        Robert Foss <robert.foss@...aro.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.15 380/913] drm/bridge: nwl-dsi: Fix PM disable depth imbalance in nwl_dsi_probe

From: Miaoqian Lin <linmq006@...il.com>

[ Upstream commit b146e343a9e05605b491b1bf4a2b62a39d5638d8 ]

The pm_runtime_enable will increase power disable depth.
Thus a pairing decrement is needed on the error handling
path to keep it balanced according to context.

Fixes: 44cfc6233447 ("drm/bridge: Add NWL MIPI DSI host controller support")
Signed-off-by: Miaoqian Lin <linmq006@...il.com>
Signed-off-by: Robert Foss <robert.foss@...aro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220105104826.1418-1-linmq006@gmail.com
Reviewed-by: Robert Foss <robert.foss@...aro.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/bridge/nwl-dsi.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/bridge/nwl-dsi.c b/drivers/gpu/drm/bridge/nwl-dsi.c
index af07eeb47ca0..6e484d836cfe 100644
--- a/drivers/gpu/drm/bridge/nwl-dsi.c
+++ b/drivers/gpu/drm/bridge/nwl-dsi.c
@@ -1204,6 +1204,7 @@ static int nwl_dsi_probe(struct platform_device *pdev)
 
 	ret = nwl_dsi_select_input(dsi);
 	if (ret < 0) {
+		pm_runtime_disable(dev);
 		mipi_dsi_host_unregister(&dsi->dsi_host);
 		return ret;
 	}
-- 
2.34.1