mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-29 01:59:02 +00:00
38 lines
1.1 KiB
Diff
38 lines
1.1 KiB
Diff
|
From 98917e88ec975eee0194ca011479e507029009ae Mon Sep 17 00:00:00 2001
|
||
|
|
From: Liu Ying <victor.liu@nxp.com>
|
||
|
|
Date: Tue, 30 Jul 2019 13:13:16 +0800
|
||
|
|
Subject: [PATCH] MLK-22171 drm/imx: Avoid leaking dangling pointer
|
||
|
|
dev->driver_data to PM ops
|
||
|
|
|
||
|
|
In case ->bind() fails, we should avoid leaking dangling pointer
|
||
|
|
dev->driver_data which is set by dev_set_drvdata(), otherwise
|
||
|
|
it would be leaked, and seen/dereferenced by PM ops, thus hang
|
||
|
|
happens. Moving dev_set_drvdata() down just before ->bind()
|
||
|
|
successfully returns may address this issue.
|
||
|
|
|
||
|
|
Signed-off-by: Liu Ying <victor.liu@nxp.com>
|
||
|
|
---
|
||
|
|
drivers/gpu/drm/imx/imx-drm-core.c | 4 ++--
|
||
|
|
1 file changed, 2 insertions(+), 2 deletions(-)
|
||
|
|
|
||
|
|
--- a/drivers/gpu/drm/imx/imx-drm-core.c
|
||
|
|
+++ b/drivers/gpu/drm/imx/imx-drm-core.c
|
||
|
|
@@ -158,8 +158,6 @@ static int imx_drm_bind(struct device *d
|
||
|
|
if (ret)
|
||
|
|
goto err_kms;
|
||
|
|
|
||
|
|
- dev_set_drvdata(dev, drm);
|
||
|
|
-
|
||
|
|
/* Now try and bind all our sub-components */
|
||
|
|
ret = component_bind_all(dev, drm);
|
||
|
|
if (ret)
|
||
|
|
@@ -185,6 +183,8 @@ static int imx_drm_bind(struct device *d
|
||
|
|
|
||
|
|
drm_fbdev_generic_setup(drm, legacyfb_depth);
|
||
|
|
|
||
|
|
+ dev_set_drvdata(dev, drm);
|
||
|
|
+
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
err_poll_fini:
|