diff options
| author | Liang He <windhl@126.com> | 2022-07-19 11:25:46 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-08-25 12:18:06 +0300 |
| commit | 49a4c1a87ef884e43cdda58b142a2a30f2f09efc (patch) | |
| tree | b0419347230c7cd1406ba6838d7eda2ac209c44c /drivers/video | |
| parent | a9286ff4c19f835229dbfb731d062cf46d55d665 (diff) | |
| download | linux-49a4c1a87ef884e43cdda58b142a2a30f2f09efc.tar.xz | |
video: fbdev: amba-clcd: Fix refcount leak bugs
[ Upstream commit 26c2b7d9fac42eb8317f3ceefa4c1a9a9170ca69 ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/video')
| -rw-r--r-- | drivers/video/fbdev/amba-clcd.c | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/drivers/video/fbdev/amba-clcd.c b/drivers/video/fbdev/amba-clcd.c index 3b7a7c74bf0a..09774ada36fb 100644 --- a/drivers/video/fbdev/amba-clcd.c +++ b/drivers/video/fbdev/amba-clcd.c @@ -714,16 +714,18 @@ 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(panel, 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); @@ -752,11 +754,21 @@ 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) |