linux-kernel - [PATCH 10/23] staging: media: tegra-video: slightly simplify cleanup on errors

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Wed,  9 Nov 2022 15:18:39 +0100
From:   luca.ceresoli@...tlin.com
To:     David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Sowjanya Komatineni <skomatineni@...dia.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Dmitry Osipenko <digetx@...il.com>
Cc:     Luca Ceresoli <luca.ceresoli@...tlin.com>,
        linux-media@...r.kernel.org, linux-tegra@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-staging@...ts.linux.dev,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Richard Leitner <richard.leitner@...data.com>
Subject: [PATCH 10/23] staging: media: tegra-video: slightly simplify cleanup on errors

From: Luca Ceresoli <luca.ceresoli@...tlin.com>

of_node_put(node) does nothing if node == NULL, so it can be moved to the
cleanup section at the bottom.

Signed-off-by: Luca Ceresoli <luca.ceresoli@...tlin.com>
---
 drivers/staging/media/tegra-video/vi.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/staging/media/tegra-video/vi.c b/drivers/staging/media/tegra-video/vi.c
index 24de4ed1eaf0..2657207e5b7d 100644
--- a/drivers/staging/media/tegra-video/vi.c
+++ b/drivers/staging/media/tegra-video/vi.c
@@ -1263,7 +1263,7 @@ static int tegra_vi_channels_alloc(struct tegra_vi *vi)
 	struct device_node *node = vi->dev->of_node;
 	struct device_node *ep = NULL;
 	struct device_node *ports;
-	struct device_node *port;
+	struct device_node *port = NULL;
 	unsigned int port_num;
 	struct device_node *parent;
 	struct v4l2_fwnode_endpoint v4l2_ep = { .bus_type = 0 };
@@ -1286,7 +1286,6 @@ static int tegra_vi_channels_alloc(struct tegra_vi *vi)
 			dev_err(vi->dev, "invalid port num %d for %pOF\n",
 				port_num, port);
 			ret = -EINVAL;
-			of_node_put(port);
 			goto cleanup;
 		}
 
@@ -1309,13 +1308,12 @@ static int tegra_vi_channels_alloc(struct tegra_vi *vi)
 
 		lanes = v4l2_ep.bus.mipi_csi2.num_data_lanes;
 		ret = tegra_vi_channel_alloc(vi, port_num, port, lanes);
-		if (ret < 0) {
-			of_node_put(port);
+		if (ret < 0)
 			goto cleanup;
-		}
 	}
 
 cleanup:
+	of_node_put(port);
 	of_node_put(ports);
 	return ret;
 }
-- 
2.34.1