[PATCH 5.10 011/491] drm/tegra: dsi: fix device leak on probe

Greg Kroah-Hartman
2026-04-13T16:43:06Z

From: Johan Hovold <johan@kernel.org>

[ Upstream commit bfef062695570842cf96358f2f46f4c6642c6689 ]

Make sure to drop the reference taken when looking up the companion
(ganged) device and its driver data during probe().

Note that holding a reference to a device does not prevent its driver
data from going away so there is no point in keeping the reference.

Fixes: e94236cde4d5 ("drm/tegra: dsi: Add ganged mode support")
Fixes: 221e3638feb8 ("drm/tegra: Fix reference leak in tegra_dsi_ganged_probe")
Cc: stable@vger.kernel.org # 3.19: 221e3638feb8
Cc: Thierry Reding <treding@nvidia.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://patch.msgid.link/20251121164201.13188-1-johan@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpu/drm/tegra/dsi.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/tegra/dsi.c b/drivers/gpu/drm/tegra/dsi.c
index 7bb26655cb3cc..74d27b564d564 100644
--- a/drivers/gpu/drm/tegra/dsi.c
+++ b/drivers/gpu/drm/tegra/dsi.c
@@ -1539,11 +1539,9 @@ static int tegra_dsi_ganged_probe(struct tegra_dsi *dsi)
return -EPROBE_DEFER;

dsi->slave = platform_get_drvdata(gangster);
-
- if (!dsi->slave) {
- put_device(&gangster->dev);
+ put_device(&gangster->dev);
+ if (!dsi->slave)
return -EPROBE_DEFER;
- }

dsi->slave->master = dsi;
}
--
2.51.0