* [PATCH] of/irq: Avoid calling list_first_entry() for empty list
@ 2013-06-23 7:50 Axel Lin
2013-07-20 5:35 ` Grant Likely
0 siblings, 1 reply; 2+ messages in thread
From: Axel Lin @ 2013-06-23 7:50 UTC (permalink / raw)
To: Grant Likely
Cc: Rob Herring, Stephen Warren, devicetree-discuss, linux-kernel
list_first_entry() expects the list is not empty, we need to check if list is
empty before calling list_first_entry(). Thus use list_first_entry_or_null()
instead of list_first_entry().
Signed-off-by: Axel Lin <axel.lin@ingics.com>
---
drivers/of/irq.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/of/irq.c b/drivers/of/irq.c
index a3c1c5a..5c645c7 100644
--- a/drivers/of/irq.c
+++ b/drivers/of/irq.c
@@ -482,8 +482,9 @@ void __init of_irq_init(const struct of_device_id *matches)
}
/* Get the next pending parent that might have children */
- desc = list_first_entry(&intc_parent_list, typeof(*desc), list);
- if (list_empty(&intc_parent_list) || !desc) {
+ desc = list_first_entry_or_null(&intc_parent_list,
+ typeof(*desc), list);
+ if (!desc) {
pr_err("of_irq_init: children remain, but no parents\n");
break;
}
--
1.8.1.2
^ permalink raw reply related [flat|nested] 2+ messages in thread* Re: [PATCH] of/irq: Avoid calling list_first_entry() for empty list
2013-06-23 7:50 [PATCH] of/irq: Avoid calling list_first_entry() for empty list Axel Lin
@ 2013-07-20 5:35 ` Grant Likely
0 siblings, 0 replies; 2+ messages in thread
From: Grant Likely @ 2013-07-20 5:35 UTC (permalink / raw)
To: Axel Lin
Cc: devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ, Stephen Warren,
linux-kernel-u79uwXL29TY76Z2rM5mHXA, Rob Herring
On Sun, 23 Jun 2013 15:50:07 +0800, Axel Lin <axel.lin-8E1dMatC8ynQT0dZR+AlfA@public.gmane.org> wrote:
> list_first_entry() expects the list is not empty, we need to check if list is
> empty before calling list_first_entry(). Thus use list_first_entry_or_null()
> instead of list_first_entry().
>
> Signed-off-by: Axel Lin <axel.lin-8E1dMatC8ynQT0dZR+AlfA@public.gmane.org>
Applied, thanks.
g.
> ---
> drivers/of/irq.c | 5 +++--
> 1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/of/irq.c b/drivers/of/irq.c
> index a3c1c5a..5c645c7 100644
> --- a/drivers/of/irq.c
> +++ b/drivers/of/irq.c
> @@ -482,8 +482,9 @@ void __init of_irq_init(const struct of_device_id *matches)
> }
>
> /* Get the next pending parent that might have children */
> - desc = list_first_entry(&intc_parent_list, typeof(*desc), list);
> - if (list_empty(&intc_parent_list) || !desc) {
> + desc = list_first_entry_or_null(&intc_parent_list,
> + typeof(*desc), list);
> + if (!desc) {
> pr_err("of_irq_init: children remain, but no parents\n");
> break;
> }
> --
> 1.8.1.2
>
>
>
^ permalink raw reply [flat|nested] 2+ messages in thread
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