| Message ID | 1445697755-26341-10-git-send-email-Julia.Lawall@lip6.fr |
|---|---|
| State | New |
| Headers | show |
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; > } > } > > -- > To unsubscribe from this list: send the line "unsubscribe linux-gpio" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-gpio" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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 -- To unsubscribe from this list: send the line "unsubscribe linux-gpio" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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; } }
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(-) -- To unsubscribe from this list: send the line "unsubscribe linux-gpio" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html