[PATCH 5.10 333/452] video: fbdev: clcdfb: Fix refcount leak in clcdfb_of_vram_setup

From: Greg Kroah-Hartman
Date: Tue Jun 07 2022 - 14:02:54 EST


From: Miaoqian Lin <linmq006@xxxxxxxxx>

[ Upstream commit b23789a59fa6f00e98a319291819f91fbba0deb8 ]

of_parse_phandle() returns a node pointer with refcount incremented, we should
use of_node_put() on it when not need anymore. Add missing of_node_put() to
avoid refcount leak.

Fixes: d10715be03bd ("video: ARM CLCD: Add DT support")
Signed-off-by: Miaoqian Lin <linmq006@xxxxxxxxx>
Signed-off-by: Helge Deller <deller@xxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/video/fbdev/amba-clcd.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/video/fbdev/amba-clcd.c b/drivers/video/fbdev/amba-clcd.c
index 33595cc4778e..79efefd224f4 100644
--- a/drivers/video/fbdev/amba-clcd.c
+++ b/drivers/video/fbdev/amba-clcd.c
@@ -771,12 +771,15 @@ static int clcdfb_of_vram_setup(struct clcd_fb *fb)
return -ENODEV;

fb->fb.screen_base = of_iomap(memory, 0);
- if (!fb->fb.screen_base)
+ if (!fb->fb.screen_base) {
+ of_node_put(memory);
return -ENOMEM;
+ }

fb->fb.fix.smem_start = of_translate_address(memory,
of_get_address(memory, 0, &size, NULL));
fb->fb.fix.smem_len = size;
+ of_node_put(memory);

return 0;
}
--
2.35.1