Add mbox_free_channel in mtk_drm_crtc_destroy.

Signed-off-by: jason-jh.lin <[email protected]>
Reviewed-by: Chun-Kuang Hu <[email protected]>
---
 drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c 
b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
index 56ff09a26dd1..8c729d9ec881 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
@@ -156,6 +156,11 @@ static void mtk_drm_crtc_destroy(struct drm_crtc *crtc)
        mtk_mutex_put(mtk_crtc->mutex);
 #if IS_REACHABLE(CONFIG_MTK_CMDQ)
        mtk_drm_cmdq_pkt_destroy(&mtk_crtc->cmdq_handle);
+
+       if (mtk_crtc->cmdq_client.chan) {
+               mbox_free_channel(mtk_crtc->cmdq_client.chan);
+               mtk_crtc->cmdq_client.chan = NULL;
+       }
 #endif
        drm_crtc_cleanup(crtc);
 }
-- 
2.18.0

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