Add a call to of_node_put in the error handling code following a call to of_parse_phandle.
This patch also moves the existing call to of_node_put tothe end of the error handling code, to make it possible to jump to of_node_put without doing the other cleanup operations. These appear to be disjoint operations, so the ordering doesn't matter.
The semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/)
// <smpl> @r exists@ local idexpression x; expression E,E1,E2; statement S; @@
*x = (of_find_node_by_path |of_find_node_by_name |of_find_node_by_phandle |of_get_parent |of_get_next_parent |of_get_next_child |of_find_compatible_node |of_match_node |of_find_node_by_type |of_find_node_with_property |of_find_matching_node |of_parse_phandle )(...); ... if (x == NULL) S <... when != x = E *if (...) { ... when != of_node_put(x) when != if (...) { ... of_node_put(x); ... } ( return <+...x...+>; | * return ...; ) } ...> ( E2 = x; | of_node_put(x); ) // </smpl>
Signed-off-by: Julia Lawall julia@diku.dk
--- sound/soc/fsl/p1022_ds.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-)
diff --git a/sound/soc/fsl/p1022_ds.c b/sound/soc/fsl/p1022_ds.c index f8176e8..63b9eaa 100644 --- a/sound/soc/fsl/p1022_ds.c +++ b/sound/soc/fsl/p1022_ds.c @@ -346,8 +346,10 @@ static int p1022_ds_probe(struct platform_device *pdev) }
mdata = kzalloc(sizeof(struct machine_data), GFP_KERNEL); - if (!mdata) - return -ENOMEM; + if (!mdata) { + ret = -ENOMEM; + goto error_put; + }
mdata->dai[0].cpu_dai_name = dev_name(&ssi_pdev->dev); mdata->dai[0].ops = &p1022_ds_ops; @@ -502,13 +504,12 @@ static int p1022_ds_probe(struct platform_device *pdev) return 0;
error: - of_node_put(codec_np); - if (sound_device) platform_device_unregister(sound_device);
kfree(mdata); - +error_put: + of_node_put(codec_np); return ret; }