[PATCH] drm/rockchip: dsi: Fix second reference leak in dw_mipi_dsi_rockchip_host_detach()

[Wentao Liang]

The reference to the dual-DSI partner device obtained through
dw_mipi_dsi_rockchip_find_second() is never released after removing
the partner component.  Drop it once component_del() is done.

Fixes: cf6d100dd238 ("drm/rockchip: dsi: add dual mipi support")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Wentao Liang <vulab@xxxxxxxxxxx>
---
 drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
index 2c1f1c53ddda..7f2d3cd28694 100644
--- a/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
+++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
@@ -1101,8 +1101,10 @@ static int dw_mipi_dsi_rockchip_host_detach(void *priv_data,
 	struct device *second;
 
 	second = dw_mipi_dsi_rockchip_find_second(dsi);
-	if (second && !IS_ERR(second))
+	if (second && !IS_ERR(second)) {
 		component_del(second, &dw_mipi_dsi_rockchip_ops);
+		put_device(second);
+	}
 
 	component_del(dsi->dev, &dw_mipi_dsi_rockchip_ops);
 
-- 
2.34.1