drm/panel: simple: Fix panel_simple_dsi_probe

[ Upstream commit 7ad9db66fafb0f0ad53fd2a66217105da5ddeffe ]

In case mipi_dsi_attach() fails remove the registered panel to avoid added
panel without corresponding device.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190226081153.31334-1-peter.ujfalusi@ti.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

drivers/gpu/drm/panel/panel-simple.c

@@ -2803,7 +2803,14 @@ static int panel_simple_dsi_probe(struct mipi_dsi_device *dsi)
 	dsi->format = desc->format;
 	dsi->lanes = desc->lanes;
 
-	return mipi_dsi_attach(dsi);
+	err = mipi_dsi_attach(dsi);
+	if (err) {
+		struct panel_simple *panel = dev_get_drvdata(&dsi->dev);
+
+		drm_panel_remove(&panel->base);
+	}
+
+	return err;
 }
 
 static int panel_simple_dsi_remove(struct mipi_dsi_device *dsi)