On Mon, May 7, 2012 at 2:29 PM, Yinghai Lu <yinghai@xxxxxxxxxx> wrote:
> for no parent no siling case.
>
> Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx>
> ---
> kernel/resource.c | 13 ++++++++-----
> 1 files changed, 8 insertions(+), 5 deletions(-)
>
> diff --git a/kernel/resource.c b/kernel/resource.c
> index 7e8ea66..51ade23 100644
> --- a/kernel/resource.c
> +++ b/kernel/resource.c
> @@ -722,14 +722,12 @@ int adjust_resource(struct resource *res, resource_size_t start, resource_size_t
>
> write_lock(&resource_lock);
>
> + if (!parent)
> + goto skip;
> +
> if ((start < parent->start) || (end > parent->end))
> goto out;
>
> - for (tmp = res->child; tmp; tmp = tmp->sibling) {
> - if ((tmp->start < start) || (tmp->end > end))
> - goto out;
> - }
> -
> if (res->sibling && (res->sibling->start <= end))
> goto out;
>
> @@ -741,6 +739,11 @@ int adjust_resource(struct resource *res, resource_size_t start, resource_size_t
> goto out;
> }
>
> +skip:
> + for (tmp = res->child; tmp; tmp = tmp->sibling)
> + if ((tmp->start < start) || (tmp->end > end))
> + goto out;
> +
> res->start = start;
> res->end = end;
> result = 0;
Where does this case occur? When do you need to adjust a resource
that has no parent?
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