linux-kernel - [PATCH v2] drm/gma500: fix a potential repeat execution in psb_driver

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Date:   Wed,  6 Apr 2022 19:31:43 +0800
From:   Xiaomeng Tong <xiam0nd.tong@...il.com>
To:     patrik.r.jakobsson@...il.com, airlied@...ux.ie, daniel@...ll.ch
Cc:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Xiaomeng Tong <xiam0nd.tong@...il.com>
Subject: [PATCH v2] drm/gma500: fix a potential repeat execution in psb_driver_load

Instead of exiting the loop as expected when an entry is found, the
list_for_each_entry() continues until the traversal is complete. To
avoid potential executing 'ret = gma_backlight_init(dev);' repeatly,
goto outside the loop when the entry is found.

Signed-off-by: Xiaomeng Tong <xiam0nd.tong@...il.com>
---

changes since v1:
 - goto outside the loop (Xiaomeng Tong)

v1: https://lore.kernel.org/lkml/20220401115811.9656-1-xiam0nd.tong@gmail.com/

---
 drivers/gpu/drm/gma500/psb_drv.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/gma500/psb_drv.c b/drivers/gpu/drm/gma500/psb_drv.c
index 2aff54d505e2..929fd47548b4 100644
--- a/drivers/gpu/drm/gma500/psb_drv.c
+++ b/drivers/gpu/drm/gma500/psb_drv.c
@@ -400,9 +400,10 @@ static int psb_driver_load(struct drm_device *dev, unsigned long flags)
 		case INTEL_OUTPUT_LVDS:
 		case INTEL_OUTPUT_MIPI:
 			ret = gma_backlight_init(dev);
-			break;
+			goto out;
 		}
 	}
+out:
 	drm_connector_list_iter_end(&conn_iter);
 
 	if (ret)
-- 
2.17.1