[PATCH] ASoC: rsnd: add missing of_node_put

From: Julia Lawall
Date: Sat Jul 15 2017 - 03:44:35 EST


for_each_child_of_node performs an of_node_get on each iteration, so a
jump out of the loop requires an of_node_put.

The semantic patch that fixes this problem is as follows
(http://coccinelle.lip6.fr):

// <smpl>
@@
local idexpression n;
expression e,e1;
identifier l;
@@

for_each_child_of_node(e1,n) {
...
(
of_node_put(n);
|
e = n
|
+ of_node_put(n);
? goto l;
)
...
}
...
l: ... when != n
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@xxxxxxx>

---
sound/soc/sh/rcar/ctu.c | 5 ++++-
sound/soc/sh/rcar/dvc.c | 5 ++++-
sound/soc/sh/rcar/mix.c | 5 ++++-
sound/soc/sh/rcar/src.c | 6 +++++-
sound/soc/sh/rcar/ssi.c | 6 +++++-
5 files changed, 22 insertions(+), 5 deletions(-)

diff -u -p a/sound/soc/sh/rcar/mix.c b/sound/soc/sh/rcar/mix.c
--- a/sound/soc/sh/rcar/mix.c
+++ b/sound/soc/sh/rcar/mix.c
@@ -168,13 +168,16 @@ int rsnd_mix_probe(struct rsnd_priv *pri
clk = devm_clk_get(dev, name);
if (IS_ERR(clk)) {
ret = PTR_ERR(clk);
+ of_node_put(np);
goto rsnd_mix_probe_done;
}

ret = rsnd_mod_init(priv, rsnd_mod_get(mix), &rsnd_mix_ops,
clk, rsnd_mod_get_status, RSND_MOD_MIX, i);
- if (ret)
+ if (ret) {
+ of_node_put(np);
goto rsnd_mix_probe_done;
+ }

i++;
}
diff -u -p a/sound/soc/sh/rcar/ctu.c b/sound/soc/sh/rcar/ctu.c
--- a/sound/soc/sh/rcar/ctu.c
+++ b/sound/soc/sh/rcar/ctu.c
@@ -394,13 +394,16 @@ int rsnd_ctu_probe(struct rsnd_priv *pri
clk = devm_clk_get(dev, name);
if (IS_ERR(clk)) {
ret = PTR_ERR(clk);
+ of_node_put(np);
goto rsnd_ctu_probe_done;
}

ret = rsnd_mod_init(priv, rsnd_mod_get(ctu), &rsnd_ctu_ops,
clk, rsnd_mod_get_status, RSND_MOD_CTU, i);
- if (ret)
+ if (ret) {
+ of_node_put(np);
goto rsnd_ctu_probe_done;
+ }

i++;
}
diff -u -p a/sound/soc/sh/rcar/ssi.c b/sound/soc/sh/rcar/ssi.c
--- a/sound/soc/sh/rcar/ssi.c
+++ b/sound/soc/sh/rcar/ssi.c
@@ -1079,6 +1079,7 @@ int rsnd_ssi_probe(struct rsnd_priv *pri
clk = devm_clk_get(dev, name);
if (IS_ERR(clk)) {
ret = PTR_ERR(clk);
+ of_node_put(np);
goto rsnd_ssi_probe_done;
}

@@ -1091,6 +1092,7 @@ int rsnd_ssi_probe(struct rsnd_priv *pri
ssi->irq = irq_of_parse_and_map(np, 0);
if (!ssi->irq) {
ret = -EINVAL;
+ of_node_put(np);
goto rsnd_ssi_probe_done;
}

@@ -1101,8 +1103,10 @@ int rsnd_ssi_probe(struct rsnd_priv *pri

ret = rsnd_mod_init(priv, rsnd_mod_get(ssi), ops, clk,
rsnd_ssi_get_status, RSND_MOD_SSI, i);
- if (ret)
+ if (ret) {
+ of_node_put(np);
goto rsnd_ssi_probe_done;
+ }

i++;
}
diff -u -p a/sound/soc/sh/rcar/src.c b/sound/soc/sh/rcar/src.c
--- a/sound/soc/sh/rcar/src.c
+++ b/sound/soc/sh/rcar/src.c
@@ -581,20 +581,24 @@ int rsnd_src_probe(struct rsnd_priv *pri
src->irq = irq_of_parse_and_map(np, 0);
if (!src->irq) {
ret = -EINVAL;
+ of_node_put(np);
goto rsnd_src_probe_done;
}

clk = devm_clk_get(dev, name);
if (IS_ERR(clk)) {
ret = PTR_ERR(clk);
+ of_node_put(np);
goto rsnd_src_probe_done;
}

ret = rsnd_mod_init(priv, rsnd_mod_get(src),
&rsnd_src_ops, clk, rsnd_mod_get_status,
RSND_MOD_SRC, i);
- if (ret)
+ if (ret) {
+ of_node_put(np);
goto rsnd_src_probe_done;
+ }

skip:
i++;
diff -u -p a/sound/soc/sh/rcar/dvc.c b/sound/soc/sh/rcar/dvc.c
--- a/sound/soc/sh/rcar/dvc.c
+++ b/sound/soc/sh/rcar/dvc.c
@@ -380,13 +380,16 @@ int rsnd_dvc_probe(struct rsnd_priv *pri
clk = devm_clk_get(dev, name);
if (IS_ERR(clk)) {
ret = PTR_ERR(clk);
+ of_node_put(np);
goto rsnd_dvc_probe_done;
}

ret = rsnd_mod_init(priv, rsnd_mod_get(dvc), &rsnd_dvc_ops,
clk, rsnd_mod_get_status, RSND_MOD_DVC, i);
- if (ret)
+ if (ret) {
+ of_node_put(np);
goto rsnd_dvc_probe_done;
+ }

i++;
}