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drm/tegra: dc: Fix reference leak in tegra_dc_couple()

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driver_find_device() calls get_device() to increment the reference
count once a matching device is found, but there is no put_device() to
balance the reference count. To avoid reference count leakage, add
put_device() to decrease the reference count.

Found by code review.

Cc: stable@vger.kernel.org
Fixes: a31500fe70 ("drm/tegra: dc: Restore coupling of display controllers")
Signed-off-by: Ma Ke <make24@iscas.ac.cn>
Acked-by: Mikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://patch.msgid.link/20251022114720.24937-1-make24@iscas.ac.cn
This commit is contained in:
Ma Ke 2025-10-22 19:47:20 +08:00 committed by Thierry Reding
parent 0a4a18e888
commit 4c5376b4b1
1 changed files with 1 additions and 0 deletions
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drivers/gpu/drm/tegra/dc.c
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@ -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;