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pinctrl: samsung: Fix device node refcount leaks in init code 

Several functions use for_each_child_of_node() loop with a break to find
a matching child node.  Although each iteration of
for_each_child_of_node puts the previous node, but early exit from loop
misses it.  This leads to leak of device node.

Cc: <stable@vger.kernel.org>
Fixes: 9a2c1c3b91 ("pinctrl: samsung: Allow grouping multiple pinmux/pinconf nodes")
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
This commit is contained in:
Krzysztof Kozlowski 2019-08-05 18:27:10 +02:00
parent 7f028caadf
commit a322b3377f
1 changed files with 8 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/pinctrl/samsung/pinctrl-samsung.c
View File

@ -272,6 +272,7 @@ static int samsung_dt_node_to_map(struct pinctrl_dev *pctldev,
&reserved_maps, num_maps);
if (ret < 0) {
samsung_dt_free_map(pctldev, *map, *num_maps);
of_node_put(np);
return ret;
}
}
@ -785,8 +786,10 @@ static struct samsung_pmx_func *samsung_pinctrl_create_functions(
if (!of_get_child_count(cfg_np)) {
ret = samsung_pinctrl_create_function(dev, drvdata,
cfg_np, func);
if (ret < 0)
if (ret < 0) {
of_node_put(cfg_np);
return ERR_PTR(ret);
}
if (ret > 0) {
++func;
++func_cnt;
@ -797,8 +800,11 @@ static struct samsung_pmx_func *samsung_pinctrl_create_functions(
for_each_child_of_node(cfg_np, func_np) {
ret = samsung_pinctrl_create_function(dev, drvdata,
func_np, func);
if (ret < 0)
if (ret < 0) {
of_node_put(func_np);
of_node_put(cfg_np);
return ERR_PTR(ret);
}
if (ret > 0) {
++func;
++func_cnt;