linux-kernel - [PATCH v2 4/7] resource: add bus number support

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Date:	Fri, 05 Mar 2010 10:47:42 -0700
From:	Bjorn Helgaas <bjorn.helgaas@...com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Len Brown <lenb@...nel.org>
Cc:	linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
	Adam Belay <abelay@....edu>
Subject: [PATCH v2 4/7] 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@...com>
---

 include/linux/ioport.h |    1 +
 lib/vsprintf.c         |    9 +++++++++
 2 files changed, 10 insertions(+), 0 deletions(-)


diff --git a/include/linux/ioport.h b/include/linux/ioport.h
index b126209..510e4ac 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 4d58d28..bcabb2f 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;

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