resource/PCI: align functions now return start of resource
As suggested by Linus, align functions should return the start
of a resource, not void. An update of "res->start" is no longer
necessary.
Cc: Bjorn Helgaas <bjorn.helgaas@hp.com>
Cc: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
diff --git a/arch/alpha/kernel/pci.c b/arch/alpha/kernel/pci.c
index a91ba28..5cf111e 100644
--- a/arch/alpha/kernel/pci.c
+++ b/arch/alpha/kernel/pci.c
@@ -126,7 +126,7 @@
#define MB (1024*KB)
#define GB (1024*MB)
-void
+resource_size_t
pcibios_align_resource(void *data, struct resource *res,
resource_size_t size, resource_size_t align)
{
@@ -184,7 +184,7 @@
}
}
- res->start = start;
+ return start;
}
#undef KB
#undef MB
diff --git a/arch/arm/kernel/bios32.c b/arch/arm/kernel/bios32.c
index 8096819..a7c85f8 100644
--- a/arch/arm/kernel/bios32.c
+++ b/arch/arm/kernel/bios32.c
@@ -616,15 +616,17 @@
* but we want to try to avoid allocating at 0x2900-0x2bff
* which might be mirrored at 0x0100-0x03ff..
*/
-void pcibios_align_resource(void *data, struct resource *res,
- resource_size_t size, resource_size_t align)
+resource_size_t pcibios_align_resource(void *data, struct resource *res,
+ resource_size_t size, resource_size_t align)
{
resource_size_t start = res->start;
if (res->flags & IORESOURCE_IO && start & 0x300)
start = (start + 0x3ff) & ~0x3ff;
- res->start = (start + align - 1) & ~(align - 1);
+ start = (start + align - 1) & ~(align - 1);
+
+ return start;
}
/**
diff --git a/arch/cris/arch-v32/drivers/pci/bios.c b/arch/cris/arch-v32/drivers/pci/bios.c
index 77ee319..5811e2f 100644
--- a/arch/cris/arch-v32/drivers/pci/bios.c
+++ b/arch/cris/arch-v32/drivers/pci/bios.c
@@ -41,18 +41,16 @@
return 0;
}
-void
+resource_size_t
pcibios_align_resource(void *data, struct resource *res,
resource_size_t size, resource_size_t align)
{
- if (res->flags & IORESOURCE_IO) {
- resource_size_t start = res->start;
+ resource_size_t start = res->start;
- if (start & 0x300) {
- start = (start + 0x3ff) & ~0x3ff;
- res->start = start;
- }
- }
+ if ((res->flags & IORESOURCE_IO) && (start & 0x300))
+ start = (start + 0x3ff) & ~0x3ff;
+
+ return start
}
int pcibios_enable_resources(struct pci_dev *dev, int mask)
diff --git a/arch/frv/mb93090-mb00/pci-frv.c b/arch/frv/mb93090-mb00/pci-frv.c
index 566bdeb..c947aa4 100644
--- a/arch/frv/mb93090-mb00/pci-frv.c
+++ b/arch/frv/mb93090-mb00/pci-frv.c
@@ -32,18 +32,16 @@
* but we want to try to avoid allocating at 0x2900-0x2bff
* which might have be mirrored at 0x0100-0x03ff..
*/
-void
+resource_size_t
pcibios_align_resource(void *data, struct resource *res,
resource_size_t size, resource_size_t align)
{
- if (res->flags & IORESOURCE_IO) {
- resource_size_t start = res->start;
+ resource_size_t start = res->start;
- if (start & 0x300) {
- start = (start + 0x3ff) & ~0x3ff;
- res->start = start;
- }
- }
+ if ((res->flags & IORESOURCE_IO) && (start & 0x300))
+ start = (start + 0x3ff) & ~0x3ff;
+
+ return start
}
diff --git a/arch/ia64/pci/pci.c b/arch/ia64/pci/pci.c
index df639db7..ef574cd 100644
--- a/arch/ia64/pci/pci.c
+++ b/arch/ia64/pci/pci.c
@@ -547,10 +547,11 @@
acpi_pci_irq_disable(dev);
}
-void
+resource_size_t
pcibios_align_resource (void *data, struct resource *res,
resource_size_t size, resource_size_t align)
{
+ return res->start;
}
/*
diff --git a/arch/mips/pci/pci.c b/arch/mips/pci/pci.c
index 9a11c22..9085988 100644
--- a/arch/mips/pci/pci.c
+++ b/arch/mips/pci/pci.c
@@ -49,7 +49,7 @@
* but we want to try to avoid allocating at 0x2900-0x2bff
* which might have be mirrored at 0x0100-0x03ff..
*/
-void
+resource_size_t
pcibios_align_resource(void *data, struct resource *res,
resource_size_t size, resource_size_t align)
{
@@ -73,7 +73,7 @@
start = PCIBIOS_MIN_MEM + hose->mem_resource->start;
}
- res->start = start;
+ return start;
}
static void __devinit pcibios_scanbus(struct pci_controller *hose)
diff --git a/arch/mips/pmc-sierra/yosemite/ht.c b/arch/mips/pmc-sierra/yosemite/ht.c
index 678388f..5e41008 100644
--- a/arch/mips/pmc-sierra/yosemite/ht.c
+++ b/arch/mips/pmc-sierra/yosemite/ht.c
@@ -345,14 +345,13 @@
return pcibios_enable_resources(dev);
}
-void pcibios_align_resource(void *data, struct resource *res,
- resource_size_t size, resource_size_t align)
+resource_size_t pcibios_align_resource(void *data, struct resource *res,
+ resource_size_t size, resource_size_t align)
{
struct pci_dev *dev = data;
+ resource_size_t start = res->start;
if (res->flags & IORESOURCE_IO) {
- resource_size_t start = res->start;
-
/* We need to avoid collisions with `mirrored' VGA ports
and other strange ISA hardware, so we always want the
addresses kilobyte aligned. */
@@ -363,8 +362,9 @@
}
start = (start + 1024 - 1) & ~(1024 - 1);
- res->start = start;
}
+
+ return start;
}
struct pci_ops titan_pci_ops = {
diff --git a/arch/mn10300/unit-asb2305/pci-asb2305.c b/arch/mn10300/unit-asb2305/pci-asb2305.c
index 78cd134..b0b3758 100644
--- a/arch/mn10300/unit-asb2305/pci-asb2305.c
+++ b/arch/mn10300/unit-asb2305/pci-asb2305.c
@@ -31,9 +31,11 @@
* but we want to try to avoid allocating at 0x2900-0x2bff
* which might have be mirrored at 0x0100-0x03ff..
*/
-void pcibios_align_resource(void *data, struct resource *res,
- resource_size_t size, resource_size_t align)
+resource_size_t pcibios_align_resource(void *data, struct resource *res,
+ resource_size_t size, resource_size_t align)
{
+ resource_size_t start = res->start;
+
#if 0
struct pci_dev *dev = data;
@@ -47,14 +49,10 @@
);
#endif
- if (res->flags & IORESOURCE_IO) {
- unsigned long start = res->start;
+ if ((res->flags & IORESOURCE_IO) && (start & 0x300))
+ start = (start + 0x3ff) & ~0x3ff;
- if (start & 0x300) {
- start = (start + 0x3ff) & ~0x3ff;
- res->start = start;
- }
- }
+ return start;
}
diff --git a/arch/parisc/kernel/pci.c b/arch/parisc/kernel/pci.c
index f7064ab..4463a31 100644
--- a/arch/parisc/kernel/pci.c
+++ b/arch/parisc/kernel/pci.c
@@ -254,10 +254,10 @@
* Since we are just checking candidates, don't use any fields other
* than res->start.
*/
-void pcibios_align_resource(void *data, struct resource *res,
+resource_size_t pcibios_align_resource(void *data, struct resource *res,
resource_size_t size, resource_size_t alignment)
{
- resource_size_t mask, align;
+ resource_size_t mask, align, start = res->start;
DBG_RES("pcibios_align_resource(%s, (%p) [%lx,%lx]/%x, 0x%lx, 0x%lx)\n",
pci_name(((struct pci_dev *) data)),
@@ -269,10 +269,10 @@
/* Align to largest of MIN or input size */
mask = max(alignment, align) - 1;
- res->start += mask;
- res->start &= ~mask;
+ start += mask;
+ start &= ~mask;
- /* The caller updates the end field, we don't. */
+ return start;
}
diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c
index cadbed6..d7eebba 100644
--- a/arch/powerpc/kernel/pci-common.c
+++ b/arch/powerpc/kernel/pci-common.c
@@ -1181,21 +1181,20 @@
* but we want to try to avoid allocating at 0x2900-0x2bff
* which might have be mirrored at 0x0100-0x03ff..
*/
-void pcibios_align_resource(void *data, struct resource *res,
+resource_size_t pcibios_align_resource(void *data, struct resource *res,
resource_size_t size, resource_size_t align)
{
struct pci_dev *dev = data;
+ resource_size_t start = res->start;
if (res->flags & IORESOURCE_IO) {
- resource_size_t start = res->start;
-
if (skip_isa_ioresource_align(dev))
- return;
- if (start & 0x300) {
+ return start;
+ if (start & 0x300)
start = (start + 0x3ff) & ~0x3ff;
- res->start = start;
- }
}
+
+ return start;
}
EXPORT_SYMBOL(pcibios_align_resource);
diff --git a/arch/sh/drivers/pci/pci.c b/arch/sh/drivers/pci/pci.c
index c481df6..b36ca82 100644
--- a/arch/sh/drivers/pci/pci.c
+++ b/arch/sh/drivers/pci/pci.c
@@ -148,8 +148,8 @@
* addresses to be allocated in the 0x000-0x0ff region
* modulo 0x400.
*/
-void pcibios_align_resource(void *data, struct resource *res,
- resource_size_t size, resource_size_t align)
+resource_size_t pcibios_align_resource(void *data, struct resource *res,
+ resource_size_t size, resource_size_t align)
{
struct pci_dev *dev = data;
struct pci_channel *chan = dev->sysdata;
@@ -171,7 +171,7 @@
start = PCIBIOS_MIN_MEM + chan->mem_resource->start;
}
- res->start = start;
+ return start;
}
void pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region,
diff --git a/arch/sparc/kernel/pci.c b/arch/sparc/kernel/pci.c
index 592b03d..d56c1f3 100644
--- a/arch/sparc/kernel/pci.c
+++ b/arch/sparc/kernel/pci.c
@@ -722,9 +722,10 @@
{
}
-void pcibios_align_resource(void *data, struct resource *res,
- resource_size_t size, resource_size_t align)
+resource_size_t pcibios_align_resource(void *data, struct resource *res,
+ resource_size_t size, resource_size_t align)
{
+ return res->start;
}
int pcibios_enable_device(struct pci_dev *dev, int mask)
diff --git a/arch/sparc/kernel/pcic.c b/arch/sparc/kernel/pcic.c
index 4e2724e..46fda64 100644
--- a/arch/sparc/kernel/pcic.c
+++ b/arch/sparc/kernel/pcic.c
@@ -768,9 +768,10 @@
return str;
}
-void pcibios_align_resource(void *data, struct resource *res,
- resource_size_t size, resource_size_t align)
+resource_size_t pcibios_align_resource(void *data, struct resource *res,
+ resource_size_t size, resource_size_t align)
{
+ return res->start;
}
int pcibios_enable_device(struct pci_dev *pdev, int mask)
diff --git a/arch/x86/pci/i386.c b/arch/x86/pci/i386.c
index 5dc9e8c..924e40c 100644
--- a/arch/x86/pci/i386.c
+++ b/arch/x86/pci/i386.c
@@ -60,22 +60,20 @@
* but we want to try to avoid allocating at 0x2900-0x2bff
* which might have be mirrored at 0x0100-0x03ff..
*/
-void
+resource_size_t
pcibios_align_resource(void *data, struct resource *res,
resource_size_t size, resource_size_t align)
{
struct pci_dev *dev = data;
+ resource_size_t start = res->start;
if (res->flags & IORESOURCE_IO) {
- resource_size_t start = res->start;
-
if (skip_isa_ioresource_align(dev))
- return;
- if (start & 0x300) {
+ return start;
+ if (start & 0x300)
start = (start + 0x3ff) & ~0x3ff;
- res->start = start;
- }
}
+ return start;
}
EXPORT_SYMBOL(pcibios_align_resource);
diff --git a/arch/xtensa/kernel/pci.c b/arch/xtensa/kernel/pci.c
index b7c0734..d7efab0 100644
--- a/arch/xtensa/kernel/pci.c
+++ b/arch/xtensa/kernel/pci.c
@@ -69,26 +69,25 @@
* but we want to try to avoid allocating at 0x2900-0x2bff
* which might have be mirrored at 0x0100-0x03ff..
*/
-void
+resource_size_t
pcibios_align_resource(void *data, struct resource *res, resource_size_t size,
resource_size_t align)
{
struct pci_dev *dev = data;
+ resource_size_t start = res->start;
if (res->flags & IORESOURCE_IO) {
- resource_size_t start = res->start;
-
if (size > 0x100) {
printk(KERN_ERR "PCI: I/O Region %s/%d too large"
" (%ld bytes)\n", pci_name(dev),
dev->resource - res, size);
}
- if (start & 0x300) {
+ if (start & 0x300)
start = (start + 0x3ff) & ~0x3ff;
- res->start = start;
- }
}
+
+ return start;
}
int
diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c
index cef28a7..d29d69a 100644
--- a/drivers/pci/bus.c
+++ b/drivers/pci/bus.c
@@ -36,8 +36,10 @@
pci_bus_alloc_resource(struct pci_bus *bus, struct resource *res,
resource_size_t size, resource_size_t align,
resource_size_t min, unsigned int type_mask,
- void (*alignf)(void *, struct resource *, resource_size_t,
- resource_size_t),
+ resource_size_t (*alignf)(void *,
+ struct resource *,
+ resource_size_t,
+ resource_size_t),
void *alignf_data)
{
int i, ret = -ENOMEM;
diff --git a/drivers/pcmcia/rsrc_mgr.c b/drivers/pcmcia/rsrc_mgr.c
index 52db172..f92a2da 100644
--- a/drivers/pcmcia/rsrc_mgr.c
+++ b/drivers/pcmcia/rsrc_mgr.c
@@ -114,22 +114,20 @@
unsigned long offset;
};
-static void pcmcia_align(void *align_data, struct resource *res,
- unsigned long size, unsigned long align)
+static resource_size_t pcmcia_align(void *align_data, struct resource *res,
+ resource_size_t size, resource_size_t align)
{
struct pcmcia_align_data *data = align_data;
- unsigned long start;
+ resource_size_t start;
start = (res->start & ~data->mask) + data->offset;
if (start < res->start)
start += data->mask + 1;
- res->start = start;
#ifdef CONFIG_X86
if (res->flags & IORESOURCE_IO) {
if (start & 0x300) {
start = (start + 0x3ff) & ~0x3ff;
- res->start = start;
}
}
#endif
@@ -137,9 +135,11 @@
#ifdef CONFIG_M68K
if (res->flags & IORESOURCE_IO) {
if ((res->start + size - 1) >= 1024)
- res->start = res->end;
+ start = res->end;
}
#endif
+
+ return start;
}
diff --git a/drivers/pcmcia/rsrc_nonstatic.c b/drivers/pcmcia/rsrc_nonstatic.c
index 9b0dc43..b659028 100644
--- a/drivers/pcmcia/rsrc_nonstatic.c
+++ b/drivers/pcmcia/rsrc_nonstatic.c
@@ -533,7 +533,7 @@
struct resource_map *map;
};
-static void
+static resource_size_t
pcmcia_common_align(void *align_data, struct resource *res,
resource_size_t size, resource_size_t align)
{
@@ -545,17 +545,18 @@
start = (res->start & ~data->mask) + data->offset;
if (start < res->start)
start += data->mask + 1;
- res->start = start;
+ return start;
}
-static void
+static resource_size_t
pcmcia_align(void *align_data, struct resource *res, resource_size_t size,
resource_size_t align)
{
struct pcmcia_align_data *data = align_data;
struct resource_map *m;
+ resource_size_t start;
- pcmcia_common_align(data, res, size, align);
+ start = pcmcia_common_align(data, res, size, align);
for (m = data->map->next; m != data->map; m = m->next) {
unsigned long start = m->base;
@@ -567,8 +568,7 @@
* fit here.
*/
if (res->start < start) {
- res->start = start;
- pcmcia_common_align(data, res, size, align);
+ start = pcmcia_common_align(data, res, size, align);
}
/*
@@ -586,7 +586,9 @@
* If we failed to find something suitable, ensure we fail.
*/
if (m == data->map)
- res->start = res->end;
+ start = res->end;
+
+ return start;
}
/*
diff --git a/include/linux/ioport.h b/include/linux/ioport.h
index 7129504..f4195de 100644
--- a/include/linux/ioport.h
+++ b/include/linux/ioport.h
@@ -120,8 +120,10 @@
extern int allocate_resource(struct resource *root, struct resource *new,
resource_size_t size, resource_size_t min,
resource_size_t max, resource_size_t align,
- void (*alignf)(void *, struct resource *,
- resource_size_t, resource_size_t),
+ resource_size_t (*alignf)(void *,
+ struct resource *,
+ resource_size_t,
+ resource_size_t),
void *alignf_data);
int adjust_resource(struct resource *res, resource_size_t start,
resource_size_t size);
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 16f48e7..1bd9f52 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -592,7 +592,8 @@
char *pcibios_setup(char *str);
/* Used only when drivers/pci/setup.c is used */
-void pcibios_align_resource(void *, struct resource *, resource_size_t,
+resource_size_t pcibios_align_resource(void *, struct resource *,
+ resource_size_t,
resource_size_t);
void pcibios_update_irq(struct pci_dev *, int irq);
@@ -827,8 +828,9 @@
struct resource *res, resource_size_t size,
resource_size_t align, resource_size_t min,
unsigned int type_mask,
- void (*alignf)(void *, struct resource *,
- resource_size_t, resource_size_t),
+ resource_size_t (*alignf)(void *, struct resource *,
+ resource_size_t,
+ resource_size_t),
void *alignf_data);
void pci_enable_bridges(struct pci_bus *bus);
diff --git a/kernel/resource.c b/kernel/resource.c
index af96c1e..e697f20 100644
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -303,8 +303,10 @@
static int find_resource(struct resource *root, struct resource *new,
resource_size_t size, resource_size_t min,
resource_size_t max, resource_size_t align,
- void (*alignf)(void *, struct resource *,
- resource_size_t, resource_size_t),
+ resource_size_t (*alignf)(void *,
+ struct resource *,
+ resource_size_t,
+ resource_size_t),
void *alignf_data)
{
struct resource *this = root->child;
@@ -330,7 +332,7 @@
tmp.end = max;
tmp.start = ALIGN(tmp.start, align);
if (alignf)
- alignf(alignf_data, &tmp, size, align);
+ tmp.start = alignf(alignf_data, &tmp, size, align);
if (tmp.start < tmp.end && tmp.end - tmp.start >= size - 1) {
new->start = tmp.start;
new->end = tmp.start + size - 1;
@@ -358,8 +360,10 @@
int allocate_resource(struct resource *root, struct resource *new,
resource_size_t size, resource_size_t min,
resource_size_t max, resource_size_t align,
- void (*alignf)(void *, struct resource *,
- resource_size_t, resource_size_t),
+ resource_size_t (*alignf)(void *,
+ struct resource *,
+ resource_size_t,
+ resource_size_t),
void *alignf_data)
{
int err;