iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

video: fbdev: amba-clcd: Fix refcount leak bugs

Browse Source 
In clcdfb_of_init_display(), we should call of_node_put() for the
references returned by of_graph_get_next_endpoint() and
of_graph_get_remote_port_parent() which have increased the refcount.

Besides, we should call of_node_put() both in fail path or when
the references are not used anymore.

Fixes: d10715be03bd ("video: ARM CLCD: Add DT support")
Signed-off-by: Liang He <windhl@126.com>
Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
Liang He 2022-07-19 16:25:46 +08:00 committed by Helge Deller
parent 075fbf0ab8
commit 26c2b7d9fa
1 changed files with 18 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
drivers/video/fbdev/amba-clcd.c
View File

@ -698,16 +698,18 @@ static int clcdfb_of_init_display(struct clcd_fb *fb)
return -ENODEV;
panel = of_graph_get_remote_port_parent(endpoint);
if (!panel)
return -ENODEV;
if (!panel) {
err = -ENODEV;
goto out_endpoint_put;
}
err = clcdfb_of_get_backlight(&fb->dev->dev, fb->panel);
if (err)
return err;
goto out_panel_put;
err = clcdfb_of_get_mode(&fb->dev->dev, panel, fb->panel);
if (err)
return err;
goto out_panel_put;
err = of_property_read_u32(fb->dev->dev.of_node, "max-memory-bandwidth",
&max_bandwidth);
@ -736,11 +738,21 @@ static int clcdfb_of_init_display(struct clcd_fb *fb)
if (of_property_read_u32_array(endpoint,
"arm,pl11x,tft-r0g0b0-pads",
tft_r0b0g0, ARRAY_SIZE(tft_r0b0g0)) != 0)
return -ENOENT;
tft_r0b0g0, ARRAY_SIZE(tft_r0b0g0)) != 0) {
err = -ENOENT;
goto out_panel_put;
}
of_node_put(panel);
of_node_put(endpoint);
return clcdfb_of_init_tft_panel(fb, tft_r0b0g0[0],
tft_r0b0g0[1], tft_r0b0g0[2]);
out_panel_put:
of_node_put(panel);
out_endpoint_put:
of_node_put(endpoint);
return err;
}
static int clcdfb_of_vram_setup(struct clcd_fb *fb)