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Date: Tue, 1 Sep 2020 17:08:39 +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, Aditya Pakki <pakki001@....edu>,
kjlu@....edu, wu000273@....edu,
Allison Randal <allison@...utok.net>,
Thomas Gleixner <tglx@...utronix.de>,
Enrico Weigelt <info@...ux.net>,
"Andrew F. Davis" <afd@...com>,
Tomi Valkeinen <tomi.valkeinen@...com>,
Alexios Zavras <alexios.zavras@...el.com>,
YueHaibing <yuehaibing@...wei.com>,
Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.4 039/214] omapfb: fix multiple reference count leaks due to pm_runtime_get_sync
From: Aditya Pakki <pakki001@....edu>
[ Upstream commit 78c2ce9bde70be5be7e3615a2ae7024ed8173087 ]
On calling pm_runtime_get_sync() the reference count of the device
is incremented. In case of failure, decrement the
reference count before returning the error.
Signed-off-by: Aditya Pakki <pakki001@....edu>
Cc: kjlu@....edu
Cc: wu000273@....edu
Cc: Allison Randal <allison@...utok.net>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Enrico Weigelt <info@...ux.net>
cc: "Andrew F. Davis" <afd@...com>
Cc: Tomi Valkeinen <tomi.valkeinen@...com>
Cc: Alexios Zavras <alexios.zavras@...el.com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: YueHaibing <yuehaibing@...wei.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200614030528.128064-1-pakki001@umn.edu
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
drivers/video/fbdev/omap2/omapfb/dss/dispc.c | 7 +++++--
drivers/video/fbdev/omap2/omapfb/dss/dsi.c | 7 +++++--
drivers/video/fbdev/omap2/omapfb/dss/dss.c | 7 +++++--
drivers/video/fbdev/omap2/omapfb/dss/hdmi4.c | 5 +++--
drivers/video/fbdev/omap2/omapfb/dss/hdmi5.c | 5 +++--
drivers/video/fbdev/omap2/omapfb/dss/venc.c | 7 +++++--
6 files changed, 26 insertions(+), 12 deletions(-)
diff --git a/drivers/video/fbdev/omap2/omapfb/dss/dispc.c b/drivers/video/fbdev/omap2/omapfb/dss/dispc.c
index 376ee5bc3ddc9..34e8171856e95 100644
--- a/drivers/video/fbdev/omap2/omapfb/dss/dispc.c
+++ b/drivers/video/fbdev/omap2/omapfb/dss/dispc.c
@@ -520,8 +520,11 @@ int dispc_runtime_get(void)
DSSDBG("dispc_runtime_get\n");
r = pm_runtime_get_sync(&dispc.pdev->dev);
- WARN_ON(r < 0);
- return r < 0 ? r : 0;
+ if (WARN_ON(r < 0)) {
+ pm_runtime_put_sync(&dispc.pdev->dev);
+ return r;
+ }
+ return 0;
}
EXPORT_SYMBOL(dispc_runtime_get);
diff --git a/drivers/video/fbdev/omap2/omapfb/dss/dsi.c b/drivers/video/fbdev/omap2/omapfb/dss/dsi.c
index d620376216e1d..6f9c25fec9946 100644
--- a/drivers/video/fbdev/omap2/omapfb/dss/dsi.c
+++ b/drivers/video/fbdev/omap2/omapfb/dss/dsi.c
@@ -1137,8 +1137,11 @@ static int dsi_runtime_get(struct platform_device *dsidev)
DSSDBG("dsi_runtime_get\n");
r = pm_runtime_get_sync(&dsi->pdev->dev);
- WARN_ON(r < 0);
- return r < 0 ? r : 0;
+ if (WARN_ON(r < 0)) {
+ pm_runtime_put_sync(&dsi->pdev->dev);
+ return r;
+ }
+ return 0;
}
static void dsi_runtime_put(struct platform_device *dsidev)
diff --git a/drivers/video/fbdev/omap2/omapfb/dss/dss.c b/drivers/video/fbdev/omap2/omapfb/dss/dss.c
index bfc5c4c5a26ad..a6b1c1598040d 100644
--- a/drivers/video/fbdev/omap2/omapfb/dss/dss.c
+++ b/drivers/video/fbdev/omap2/omapfb/dss/dss.c
@@ -768,8 +768,11 @@ int dss_runtime_get(void)
DSSDBG("dss_runtime_get\n");
r = pm_runtime_get_sync(&dss.pdev->dev);
- WARN_ON(r < 0);
- return r < 0 ? r : 0;
+ if (WARN_ON(r < 0)) {
+ pm_runtime_put_sync(&dss.pdev->dev);
+ return r;
+ }
+ return 0;
}
void dss_runtime_put(void)
diff --git a/drivers/video/fbdev/omap2/omapfb/dss/hdmi4.c b/drivers/video/fbdev/omap2/omapfb/dss/hdmi4.c
index 7060ae56c062c..4804aab342981 100644
--- a/drivers/video/fbdev/omap2/omapfb/dss/hdmi4.c
+++ b/drivers/video/fbdev/omap2/omapfb/dss/hdmi4.c
@@ -39,9 +39,10 @@ static int hdmi_runtime_get(void)
DSSDBG("hdmi_runtime_get\n");
r = pm_runtime_get_sync(&hdmi.pdev->dev);
- WARN_ON(r < 0);
- if (r < 0)
+ if (WARN_ON(r < 0)) {
+ pm_runtime_put_sync(&hdmi.pdev->dev);
return r;
+ }
return 0;
}
diff --git a/drivers/video/fbdev/omap2/omapfb/dss/hdmi5.c b/drivers/video/fbdev/omap2/omapfb/dss/hdmi5.c
index ac49531e47327..a06b6f1355bdb 100644
--- a/drivers/video/fbdev/omap2/omapfb/dss/hdmi5.c
+++ b/drivers/video/fbdev/omap2/omapfb/dss/hdmi5.c
@@ -43,9 +43,10 @@ static int hdmi_runtime_get(void)
DSSDBG("hdmi_runtime_get\n");
r = pm_runtime_get_sync(&hdmi.pdev->dev);
- WARN_ON(r < 0);
- if (r < 0)
+ if (WARN_ON(r < 0)) {
+ pm_runtime_put_sync(&hdmi.pdev->dev);
return r;
+ }
return 0;
}
diff --git a/drivers/video/fbdev/omap2/omapfb/dss/venc.c b/drivers/video/fbdev/omap2/omapfb/dss/venc.c
index f81e2a46366dd..3717dac3dcc83 100644
--- a/drivers/video/fbdev/omap2/omapfb/dss/venc.c
+++ b/drivers/video/fbdev/omap2/omapfb/dss/venc.c
@@ -391,8 +391,11 @@ static int venc_runtime_get(void)
DSSDBG("venc_runtime_get\n");
r = pm_runtime_get_sync(&venc.pdev->dev);
- WARN_ON(r < 0);
- return r < 0 ? r : 0;
+ if (WARN_ON(r < 0)) {
+ pm_runtime_put_sync(&venc.pdev->dev);
+ return r;
+ }
+ return 0;
}
static void venc_runtime_put(void)
--
2.25.1
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