[PATCH] fix: drm/tegra: tegra_dc_pin: chunks>1 error path leaks current mapping from host1x_bo_pin

[WenTao Liang <vulab@iscas.ac.cn>]

When map->chunks > 1 triggers an error, the function jumps to unpin
  before storing the current map in state->map[i]. The unpin loop only
  cleans up previously pinned planes (indices 0 through i-1), so the
  current mapping returned by host1x_bo_pin is never released via
  host1x_bo_unpin.

Cc: stable@vger.kernel.org
Fixes: c6aeaf56f468 ("drm/tegra: Implement correct DMA-BUF semantics")
Signed-off-by: WenTao Liang <vulab@iscas.ac.cn>
---
 drivers/gpu/drm/tegra/plane.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/tegra/plane.c b/drivers/gpu/drm/tegra/plane.c
index 0cb30910773f..e61485ee58f6 100644
--- a/drivers/gpu/drm/tegra/plane.c
+++ b/drivers/gpu/drm/tegra/plane.c
@@ -161,6 +161,7 @@ static int tegra_dc_pin(struct tegra_dc *dc, struct tegra_plane_state *state)
 			 */
 			if (map->chunks > 1) {
 				err = -EINVAL;
+				host1x_bo_unpin(map);
 				goto unpin;
 			}
 
-- 
2.39.5 (Apple Git-154)