1 files changed, 12 insertions, 1 deletions

diff --git a/arch/i386/pci/common.c b/arch/i386/pci/common.c
index 3f78d4d8ecf3..85503deeda46 100644
--- a/arch/i386/pci/common.c
+++ b/arch/i386/pci/common.c
@@ -293,6 +293,7 @@ static struct dmi_system_id __devinitdata pciprobe_dmi_table[] = {
 struct pci_bus * __devinit pcibios_scan_root(int busnum)
 {
         struct pci_bus *bus = NULL;
+        struct pci_sysdata *sd;
 
         dmi_check_system(pciprobe_dmi_table);
 
@@ -303,9 +304,19 @@ struct pci_bus * __devinit pcibios_scan_root(int busnum)
                 }
         }
 
+        /* Allocate per-root-bus (not per bus) arch-specific data.
+         * TODO: leak; this memory is never freed.
+         * It's arguable whether it's worth the trouble to care.
+         */
+        sd = kzalloc(sizeof(*sd), GFP_KERNEL);
+        if (!sd) {
+                printk(KERN_ERR "PCI: OOM, not probing PCI bus %02x\n", busnum);
+                return NULL;
+        }
+
         printk(KERN_DEBUG "PCI: Probing PCI hardware (bus %02x)\n", busnum);
 
-        return pci_scan_bus_parented(NULL, busnum, &pci_root_ops, NULL);
+        return pci_scan_bus_parented(NULL, busnum, &pci_root_ops, sd);
 }
 
 extern u8 pci_cache_line_size;