On Mon, Jul 27, 2015 at 04:29:25PM -0700, Yinghai Lu wrote:
> After we update size and alignment for must+optional resource, we
> reorder them with new alignment, but this is only for STARTALIGN.
>
> For SIZEALIGN type resource, after add back add_size, the alignment
> get changed, so need to do the sorting like STARTALIGN type resources.
>
> Also we need to reorder the sorting back after we restore
> resource to must only when must+optional fail to allocate for all.
>
> So move out the reordering code from the loop to separated function,
> and call it two times accordingly.
>
> Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx>
> ---
> drivers/pci/setup-bus.c | 62 +++++++++++++++++++++++++++++--------------------
> 1 file changed, 37 insertions(+), 25 deletions(-)
>
> diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
> index 7346bbf..6f2d508 100644
> --- a/drivers/pci/setup-bus.c
> +++ b/drivers/pci/setup-bus.c
> @@ -287,6 +287,31 @@ static inline void reset_resource(struct resource *res)
> res->flags = 0;
> }
>
> +static void __sort_resources(struct list_head *head)
Why did you add "__" before the function name?
> +{
> + struct pci_dev_resource *res1, *tmp_res, *res2;
> +
> + list_for_each_entry_safe(res1, tmp_res, head, list) {
> + resource_size_t align1, size1, align2, size2;
> +
> + align1 = pci_resource_alignment(res1->dev, res1->res);
> + size1 = resource_size(res1->res);
> +
> + /* reorder it */
> + list_for_each_entry(res2, head, list) {
> + if (res2 == res1)
> + break;
> +
> + align2 = pci_resource_alignment(res2->dev, res2->res);
> + size2 = resource_size(res2->res);
> + if (is_before(align1, size1, align2, size2)) {
> + list_move_tail(&res1->list, &res2->list);
> + break;
> + }
> + }
> + }
> +}
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