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-rw-r--r--arch/i386/pci/common.c32
1 files changed, 32 insertions, 0 deletions
diff --git a/arch/i386/pci/common.c b/arch/i386/pci/common.c
index f6bc48da4d2a..dbece776c5b2 100644
--- a/arch/i386/pci/common.c
+++ b/arch/i386/pci/common.c
@@ -8,6 +8,7 @@
#include <linux/pci.h>
#include <linux/ioport.h>
#include <linux/init.h>
+#include <linux/dmi.h>
#include <asm/acpi.h>
#include <asm/segment.h>
@@ -120,11 +121,42 @@ void __devinit pcibios_fixup_bus(struct pci_bus *b)
pci_read_bridge_bases(b);
}
+/*
+ * Enable renumbering of PCI bus# ranges to reach all PCI busses (Cardbus)
+ */
+#ifdef __i386__
+static int __devinit assign_all_busses(struct dmi_system_id *d)
+{
+ pci_probe |= PCI_ASSIGN_ALL_BUSSES;
+ printk(KERN_INFO "%s detected: enabling PCI bus# renumbering"
+ " (pci=assign-busses)\n", d->ident);
+ return 0;
+}
+#endif
+
+/*
+ * Laptops which need pci=assign-busses to see Cardbus cards
+ */
+static struct dmi_system_id __devinitdata pciprobe_dmi_table[] = {
+#ifdef __i386__
+ {
+ .callback = assign_all_busses,
+ .ident = "Samsung X20 Laptop",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Samsung Electronics"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "SX20S"),
+ },
+ },
+#endif /* __i386__ */
+ {}
+};
struct pci_bus * __devinit pcibios_scan_root(int busnum)
{
struct pci_bus *bus = NULL;
+ dmi_check_system(pciprobe_dmi_table);
+
while ((bus = pci_find_next_bus(bus)) != NULL) {
if (bus->number == busnum) {
/* Already scanned */