5.15-stable review patch. If anyone has any objections, please let me know.

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From: Ma Ke make24@iscas.ac.cn

commit 4c5376b4b143c4834ebd392aef2215847752b16a upstream.

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: a31500fe7055 ("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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/tegra/dc.c | 1 + 1 file changed, 1 insertion(+)

--- a/drivers/gpu/drm/tegra/dc.c +++ b/drivers/gpu/drm/tegra/dc.c @@ -2982,6 +2982,7 @@ static int tegra_dc_couple(struct tegra_ dc->client.parent = &parent->client;

dev_dbg(dc->dev, "coupled to %s\n", dev_name(companion)); + put_device(companion); }

return 0;