drm/mediatek/dp: fix memory leak on ->get_edid callback audio detection

The sads returned by drm_edid_to_sad() needs to be freed.

Fixes: e71a8ebbe086 ("drm/mediatek: dp: Audio support for MT8195")
Cc: Guillaume Ranquet <[email protected]>
Cc: Bo-Chen Chen <[email protected]>
Cc: AngeloGioacchino Del Regno <[email protected]>
Cc: Dmitry Osipenko <[email protected]>
Cc: Chun-Kuang Hu <[email protected]>
Cc: Philipp Zabel <[email protected]>
Cc: Matthias Brugger <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: <[email protected]> # v6.1+
Signed-off-by: Jani Nikula <[email protected]>
Reviewed-by: Chen-Yu Tsai <[email protected]>
Link: https://patchwork.kernel.org/project/dri-devel/patch/[email protected]/
Signed-off-by: Chun-Kuang Hu <[email protected]>

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c b/drivers/gpu/drm/mediatek/mtk_dp.c
index 93f6f8efabd6..da023de5317a 100644
--- a/drivers/gpu/drm/mediatek/mtk_dp.c
+++ b/drivers/gpu/drm/mediatek/mtk_dp.c
@@ -2049,7 +2049,6 @@ static struct edid *mtk_dp_get_edid(struct drm_bridge *bridge,
 	bool enabled = mtk_dp->enabled;
 	struct edid *new_edid = NULL;
 	struct mtk_dp_audio_cfg *audio_caps = &mtk_dp->info.audio_cur_cfg;
-	struct cea_sad *sads;
 
 	if (!enabled) {
 		drm_atomic_bridge_chain_pre_enable(bridge, connector->state->state);
@@ -2068,7 +2067,11 @@ static struct edid *mtk_dp_get_edid(struct drm_bridge *bridge,
 	}
 
 	if (new_edid) {
+		struct cea_sad *sads;
+
 		audio_caps->sad_count = drm_edid_to_sad(new_edid, &sads);
+		kfree(sads);
+
 		audio_caps->detect_monitor = drm_detect_monitor_audio(new_edid);
 	}