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| Started by | Julia Lawall <Julia.Lawall@lip6.fr> |
|---|---|
| First post | 2015-10-24 17:00 +0200 |
| Last post | 2015-10-27 17:20 +0100 |
| Articles | 3 — 3 participants |
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[PATCH 9/9] pinctrl: at91: add missing of_node_put Julia Lawall <Julia.Lawall@lip6.fr> - 2015-10-24 17:00 +0200
Re: [PATCH 9/9] pinctrl: at91: add missing of_node_put Ludovic Desroches <ludovic.desroches@atmel.com> - 2015-10-26 11:00 +0100
Re: [PATCH 9/9] pinctrl: at91: add missing of_node_put Linus Walleij <linus.walleij@linaro.org> - 2015-10-27 17:20 +0100
| From | Julia Lawall <Julia.Lawall@lip6.fr> |
|---|---|
| Date | 2015-10-24 17:00 +0200 |
| Subject | [PATCH 9/9] pinctrl: at91: add missing of_node_put |
| Message-ID | <qn8sx-3q2-7@gated-at.bofh.it> |
for_each_child_of_node performs an of_node_get on each iteration, so
a break out of the loop requires an of_node_put.
A simplified version of the semantic patch that fixes this problem is as
follows (http://coccinelle.lip6.fr):
// <smpl>
@@
expression root,e;
local idexpression child;
@@
for_each_child_of_node(root, child) {
... when != of_node_put(child)
when != e = child
(
return child;
|
+ of_node_put(child);
? return ...;
)
...
}
// </smpl>
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
---
drivers/pinctrl/pinctrl-at91.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/pinctrl/pinctrl-at91.c b/drivers/pinctrl/pinctrl-at91.c
index ce6e589..0d2fc0c 100644
--- a/drivers/pinctrl/pinctrl-at91.c
+++ b/drivers/pinctrl/pinctrl-at91.c
@@ -1122,8 +1122,10 @@ static int at91_pinctrl_parse_functions(struct device_node *np,
func->groups[i] = child->name;
grp = &info->groups[grp_index++];
ret = at91_pinctrl_parse_groups(child, grp, info, i++);
- if (ret)
+ if (ret) {
+ of_node_put(child);
return ret;
+ }
}
return 0;
@@ -1196,6 +1198,7 @@ static int at91_pinctrl_probe_dt(struct platform_device *pdev,
ret = at91_pinctrl_parse_functions(child, info, i++);
if (ret) {
dev_err(&pdev->dev, "failed to parse function\n");
+ of_node_put(child);
return ret;
}
}
--
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| From | Ludovic Desroches <ludovic.desroches@atmel.com> |
|---|---|
| Date | 2015-10-26 11:00 +0100 |
| Message-ID | <qnMJj-6CU-5@gated-at.bofh.it> |
| In reply to | #1255197 |
On Sat, Oct 24, 2015 at 04:42:35PM +0200, Julia Lawall wrote:
> for_each_child_of_node performs an of_node_get on each iteration, so
> a break out of the loop requires an of_node_put.
>
> A simplified version of the semantic patch that fixes this problem is as
> follows (http://coccinelle.lip6.fr):
>
> // <smpl>
> @@
> expression root,e;
> local idexpression child;
> @@
>
> for_each_child_of_node(root, child) {
> ... when != of_node_put(child)
> when != e = child
> (
> return child;
> |
> + of_node_put(child);
> ? return ...;
> )
> ...
> }
> // </smpl>
>
> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Acked-by: Ludovic Desroches <ludovic.desroches@atmel.com>
>
> ---
> drivers/pinctrl/pinctrl-at91.c | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/pinctrl/pinctrl-at91.c b/drivers/pinctrl/pinctrl-at91.c
> index ce6e589..0d2fc0c 100644
> --- a/drivers/pinctrl/pinctrl-at91.c
> +++ b/drivers/pinctrl/pinctrl-at91.c
> @@ -1122,8 +1122,10 @@ static int at91_pinctrl_parse_functions(struct device_node *np,
> func->groups[i] = child->name;
> grp = &info->groups[grp_index++];
> ret = at91_pinctrl_parse_groups(child, grp, info, i++);
> - if (ret)
> + if (ret) {
> + of_node_put(child);
> return ret;
> + }
> }
>
> return 0;
> @@ -1196,6 +1198,7 @@ static int at91_pinctrl_probe_dt(struct platform_device *pdev,
> ret = at91_pinctrl_parse_functions(child, info, i++);
> if (ret) {
> dev_err(&pdev->dev, "failed to parse function\n");
> + of_node_put(child);
> return ret;
> }
> }
>
> --
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> the body of a message to majordomo@vger.kernel.org
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| From | Linus Walleij <linus.walleij@linaro.org> |
|---|---|
| Date | 2015-10-27 17:20 +0100 |
| Message-ID | <qof8C-7mI-19@gated-at.bofh.it> |
| In reply to | #1255197 |
On Sat, Oct 24, 2015 at 4:42 PM, Julia Lawall <Julia.Lawall@lip6.fr> wrote:
> for_each_child_of_node performs an of_node_get on each iteration, so
> a break out of the loop requires an of_node_put.
>
> A simplified version of the semantic patch that fixes this problem is as
> follows (http://coccinelle.lip6.fr):
>
> // <smpl>
> @@
> expression root,e;
> local idexpression child;
> @@
>
> for_each_child_of_node(root, child) {
> ... when != of_node_put(child)
> when != e = child
> (
> return child;
> |
> + of_node_put(child);
> ? return ...;
> )
> ...
> }
> // </smpl>
>
> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Patch applied with Ludovic's ACK.
Yours,
Linus Walleij
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