drm: exynos: fix for loosing display mode header during mode adjustment

This patch is to preserve the display mode header during the mode adjustment.
Display mode header is overwritten with the adjusted mode header which is
throwing the stack dump.

Signed-off-by: Rahul Sharma <[email protected]>
Signed-off-by: Inki Dae <[email protected]>
Signed-off-by: Kyungmin Park <[email protected]>

diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c b/drivers/gpu/drm/exynos/exynos_hdmi.c
index 6716ecd3b3e983dfe5327d7ea1dff4b09ffa8ea8..a4052271a1f63b1bbb14199d2e4f9ad0706df346 100644 (file)
--- a/drivers/gpu/drm/exynos/exynos_hdmi.c
+++ b/drivers/gpu/drm/exynos/exynos_hdmi.c
@@ -1979,9 +1979,18 @@ static void hdmi_mode_fixup(void *ctx, struct drm_connector *connector,
                        index = hdmi_v14_conf_index(m);
 
                if (index >= 0) {
+                       struct drm_mode_object base;
+                       struct list_head head;
+
                        DRM_INFO("desired mode doesn't exist so\n");
                        DRM_INFO("use the most suitable mode among modes.\n");
+
+                       /* preserve display mode header while copying. */
+                       head = adjusted_mode->head;
+                       base = adjusted_mode->base;
                        memcpy(adjusted_mode, m, sizeof(*m));
+                       adjusted_mode->head = head;
+                       adjusted_mode->base = base;
                        break;
                }
        }