tjh.dev / kernel
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drm/tegra: dsi: fix device leak on probe

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

authored by

Johan Hovold and committed by
Thierry Reding bfef0626 cd98e734

+2 -4
+2 -4
drivers/gpu/drm/tegra/dsi.c
··· 1542 1542 return -EPROBE_DEFER; 1543 1543 1544 1544 dsi->slave = platform_get_drvdata(gangster); 1545 - 1546 - if (!dsi->slave) { 1547 - put_device(&gangster->dev); 1545 + put_device(&gangster->dev); 1546 + if (!dsi->slave) 1548 1547 return -EPROBE_DEFER; 1549 - } 1550 1548 1551 1549 dsi->slave->master = dsi; 1552 1550 }