[PATCH] drm/tegra: Fix reference count leak in tegra_dc_couple

Miaoqian Lin posted 1 patch 3 months, 1 week ago
drivers/gpu/drm/tegra/dc.c | 1 +
1 file changed, 1 insertion(+)
[PATCH] drm/tegra: Fix reference count leak in tegra_dc_couple
Posted by Miaoqian Lin 3 months, 1 week ago
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)