resource: add bus number support

Add support for bus number resources.  This is for bridges with a range of
bus numbers behind them.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>

2 files changed, 10 insertions, 0 deletions

diff --git a/include/linux/ioport.h b/include/linux/ioport.h
index b126209a40e2..510e4ac918dd 100644
--- a/include/linux/ioport.h
+++ b/include/linux/ioport.h
@@ -39,6 +39,7 @@ struct resource_list {
 #define IORESOURCE_MEM          0x00000200
 #define IORESOURCE_IRQ          0x00000400
 #define IORESOURCE_DMA          0x00000800
+#define IORESOURCE_BUS          0x00001000
 
 #define IORESOURCE_PREFETCH     0x00002000      /* No side effects */
 #define IORESOURCE_READONLY     0x00004000
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index 0d461c7c14db..ebbecf90d5d7 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -609,6 +609,12 @@ static char *resource_string(char *buf, char *end, struct resource *res,
                 .precision = -1,
                 .flags = SPECIAL | SMALL | ZEROPAD,
         };
+        static const struct printf_spec bus_spec = {
+                .base = 16,
+                .field_width = 2,
+                .precision = -1,
+                .flags = SMALL | ZEROPAD,
+        };
         static const struct printf_spec dec_spec = {
                 .base = 10,
                 .precision = -1,
@@ -651,6 +657,9 @@ static char *resource_string(char *buf, char *end, struct resource *res,
         } else if (res->flags & IORESOURCE_DMA) {
                 p = string(p, pend, "dma ", str_spec);
                 specp = &dec_spec;
+        } else if (res->flags & IORESOURCE_BUS) {
+                p = string(p, pend, "bus ", str_spec);
+                specp = &bus_spec;
         } else {
                 p = string(p, pend, "??? ", str_spec);
                 specp = &mem_spec;