[SeaBIOS] [PATCH] Replace CONFIG_PCI_ROOT1/2 with CONFIG_EXTRA_PCI_ROOTS.

[Kevin O'Connor]

Instead of defining the bus id of each extra root bus, define the
number of extra root buses.  The bus id isn't necessarily stable from
one boot to the next.
---
 src/Kconfig |   20 ++++++++------------
 src/pci.c   |   10 ++++------
 2 files changed, 12 insertions(+), 18 deletions(-)

diff --git a/src/Kconfig b/src/Kconfig
index bbed963..70e3509 100644
--- a/src/Kconfig
+++ b/src/Kconfig
@@ -201,19 +201,15 @@ menu "Hardware support"
             Support parallel ports. This also enables int 17 parallel port calls.
 
     config EXTRA_PCI_ROOTS
-        bool "Extra root buses"
-        default n
+        int "Number of extra root buses"
+        default 0
         help
-            If the target machine has multiple independent root buses,
-            the extra buses may be specified here.
-    config PCI_ROOT1
-        depends on EXTRA_PCI_ROOTS
-        hex "Extra primary PCI root bus number"
-        default 0x00
-    config PCI_ROOT2
-        depends on EXTRA_PCI_ROOTS
-        hex "Extra secondary PCI root bus number"
-        default 0x00
+            If the target machine has multiple independent root buses
+            set this to a positive value.  The SeaBIOS PCI probe will
+            then search for the given number of extra root buses.
+
+            Most machines do not have multiple root buses and this
+            setting should be zero.
 
     config USE_SMM
         depends on !COREBOOT
diff --git a/src/pci.c b/src/pci.c
index 0de8ec5..23a6878 100644
--- a/src/pci.c
+++ b/src/pci.c
@@ -93,16 +93,12 @@ void
 pci_probe(void)
 {
     dprintf(3, "PCI probe\n");
-    if (CONFIG_PCI_ROOT1 && CONFIG_PCI_ROOT1 > MaxPCIBus)
-        MaxPCIBus = CONFIG_PCI_ROOT1;
-    if (CONFIG_PCI_ROOT2 && CONFIG_PCI_ROOT2 > MaxPCIBus)
-        MaxPCIBus = CONFIG_PCI_ROOT2;
-
     struct pci_device *busdevs[256];
     memset(busdevs, 0, sizeof(busdevs));
     struct pci_device **pprev = &PCIDevices;
     int bus = -1, lastbus = 0, rootbuses = 0, count=0;
-    while (bus < MaxPCIBus) {
+    while (bus < 0xff && (bus < MaxPCIBus
+                          || rootbuses < CONFIG_EXTRA_PCI_ROOTS)) {
         bus++;
         int bdf;
         foreachbdf(bdf, bus) {
@@ -125,6 +121,8 @@ pci_probe(void)
                     rootbuses++;
                 lastbus = bus;
                 rootbus = rootbuses;
+                if (bus > MaxPCIBus)
+                    MaxPCIBus = bus;
             } else {
                 rootbus = parent->rootbus;
             }
-- 
1.7.4.4