[PATCH v1] drm/panel: ili9881c: remove panel on DSI attach failure

[Myeonghun Pak]

The probe path calls drm_panel_add() before mipi_dsi_attach().

If mipi_dsi_attach() fails, the driver returns without calling

drm_panel_remove(), leaving the panel registered in the global DRM
panel list. The driver's .remove() callback does not handle this case
because failed probe does not transition through the normal bound-device
removal path.

Fix this by unwinding drm_panel_add() when mipi_dsi_attach() fails.

Co-developed-by: Ijae Kim <ae878000@xxxxxxxxx>
Signed-off-by: Ijae Kim <ae878000@xxxxxxxxx>
Co-developed-by: Taegyu Kim <tmk5904@xxxxxxx>
Signed-off-by: Taegyu Kim <tmk5904@xxxxxxx>
Co-developed-by: Yuho Choi <dbgh9129@xxxxxxxxx>
Signed-off-by: Yuho Choi <dbgh9129@xxxxxxxxx>
Signed-off-by: Myeonghun Pak <mhun512@xxxxxxxxx>
---
 drivers/gpu/drm/panel/panel-ilitek-ili9881c.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c b/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c
index 947b47841..be5e58658 100644
--- a/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c
+++ b/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c
@@ -2359,7 +2359,13 @@ static int ili9881c_dsi_probe(struct mipi_dsi_device *dsi)
 	dsi->format = MIPI_DSI_FMT_RGB888;
 	dsi->lanes = ctx->desc->lanes;
 
-	return mipi_dsi_attach(dsi);
+	ret = mipi_dsi_attach(dsi);
+	if (ret) {
+		drm_panel_remove(&ctx->panel);
+		return ret;
+	}
+
+	return 0;
 }
 
 static void ili9881c_dsi_remove(struct mipi_dsi_device *dsi)
-- 
2.47.1