[PATCH] drm/gma500: clean up modeset on backlight init failure

[Myeonghun Pak <mhun512@gmail.com>]

psb_driver_load() initializes KMS polling before it attempts to
initialize backlight support. If gma_backlight_init() fails, the
function returns directly and skips psb_driver_unload(), leaving
drm_kms_helper_poll_fini() uncalled.

Use the existing error path so the partially initialized modeset state
is unwound before probe fails.

This issue was identified during our ongoing static-analysis research while
reviewing kernel code.

Fixes: 1f90b1232773 ("drm/gma500: Refactor backlight support (v2)")
Cc: stable@vger.kernel.org
Co-developed-by: Ijae Kim <ae878000@gmail.com>
Signed-off-by: Ijae Kim <ae878000@gmail.com>
Signed-off-by: Myeonghun Pak <mhun512@gmail.com>
---
 drivers/gpu/drm/gma500/psb_drv.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/gma500/psb_drv.c b/drivers/gpu/drm/gma500/psb_drv.c
index 005ab7f535..7218026fe2 100644
--- a/drivers/gpu/drm/gma500/psb_drv.c
+++ b/drivers/gpu/drm/gma500/psb_drv.c
@@ -406,7 +406,7 @@ static int psb_driver_load(struct drm_device *dev, unsigned long flags)
 	drm_connector_list_iter_end(&conn_iter);
 
 	if (ret)
-		return ret;
+		goto out_err;
 	psb_intel_opregion_enable_asle(dev);
 
 	return devm_add_action_or_reset(dev->dev, psb_device_release, dev);
-- 
2.47.1