* [PATCH] drm/tegra: Fix reference count leak in tegra_dc_couple
@ 2025-10-27 8:45 Miaoqian Lin
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From: Miaoqian Lin @ 2025-10-27 8:45 UTC (permalink / raw)
To: Thierry Reding, Mikko Perttunen, David Airlie, Simona Vetter,
Jonathan Hunter, Dmitry Osipenko, dri-devel, linux-tegra,
linux-kernel
Cc: linmq006, stable
The driver_find_device() function returns a device with its reference
count incremented. The caller is responsible for calling put_device()
to release this reference when done. Fix this leak by adding the missing
put_device() call.
Found via static analysis.
Fixes: f68ba6912bd2 ("drm/tegra: dc: Link DC1 to DC0 on Tegra20")
Cc: stable@vger.kernel.org
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
---
drivers/gpu/drm/tegra/dc.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c
index 59d5c1ba145a..6c84bd69b11f 100644
--- a/drivers/gpu/drm/tegra/dc.c
+++ b/drivers/gpu/drm/tegra/dc.c
@@ -3148,6 +3148,7 @@ static int tegra_dc_couple(struct tegra_dc *dc)
dc->client.parent = &parent->client;
dev_dbg(dc->dev, "coupled to %s\n", dev_name(companion));
+ put_device(companion);
}
return 0;
--
2.39.5 (Apple Git-154)
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