#include <linux/sfi_acpi.h>
#include <linux/bitmap.h>
#include <linux/dmi.h>
+#include <linux/slab.h>
#include <asm/e820.h>
#include <asm/pci_x86.h>
#include <asm/acpi.h>
{
struct pci_mmcfg_region *cfg, *cfgx;
- /* last one*/
- cfg = list_entry(pci_mmcfg_list.prev, typeof(*cfg), list);
- if (cfg)
- if (cfg->end_bus < cfg->start_bus)
- cfg->end_bus = 255;
-
- if (list_is_singular(&pci_mmcfg_list))
- return;
-
- /* don't overlap please */
+ /* Fixup overlaps */
list_for_each_entry(cfg, &pci_mmcfg_list, list) {
if (cfg->end_bus < cfg->start_bus)
cfg->end_bus = 255;
+ /* Don't access the list head ! */
+ if (cfg->list.next == &pci_mmcfg_list)
+ break;
+
cfgx = list_entry(cfg->list.next, typeof(*cfg), list);
- if (cfg != cfgx && cfg->end_bus >= cfgx->start_bus)
+ if (cfg->end_bus >= cfgx->start_bus)
cfg->end_bus = cfgx->start_bus - 1;
}
}