[PATCH AUTOSEL 5.15 2/4] drm/qxl: prevent memory leak

[Sasha Levin]

From: Zongmin Zhou <zhouzongmin@xxxxxxxxxx>

[ Upstream commit 0e8b9f258baed25f1c5672613699247c76b007b5 ]

The allocated memory for qdev->dumb_heads should be released
in qxl_destroy_monitors_object before qxl suspend.
otherwise,qxl_create_monitors_object will be called to
reallocate memory for qdev->dumb_heads after qxl resume,
it will cause memory leak.

Signed-off-by: Zongmin Zhou <zhouzongmin@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20230801025309.4049813-1-zhouzongmin@xxxxxxxxxx
Reviewed-by: Dave Airlie <airlied@xxxxxxxxxx>
Signed-off-by: Maxime Ripard <mripard@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/gpu/drm/qxl/qxl_display.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/qxl/qxl_display.c b/drivers/gpu/drm/qxl/qxl_display.c
index 9e0a1e8360117..dc04412784a0d 100644
--- a/drivers/gpu/drm/qxl/qxl_display.c
+++ b/drivers/gpu/drm/qxl/qxl_display.c
@@ -1221,6 +1221,9 @@ int qxl_destroy_monitors_object(struct qxl_device *qdev)
 	if (!qdev->monitors_config_bo)
 		return 0;
 
+	kfree(qdev->dumb_heads);
+	qdev->dumb_heads = NULL;
+
 	qdev->monitors_config = NULL;
 	qdev->ram_header->monitors_config = 0;
 
-- 
2.42.0