[PATCH 6.1 020/481] PCI: Introduce pci_dev_for_each_resource()

Greg Kroah-Hartman
2026-03-23T14:52:12Z

6.1-stable review patch. If anyone has any objections, please let me know.

------------------

From: Mika Westerberg <mika.westerberg@linux.intel.com>

[ Upstream commit 09cc900632400079619e9154604fd299c2cc9a5a ]

Instead of open-coding it everywhere introduce a tiny helper that can be
used to iterate over each resource of a PCI device, and convert the most
obvious users into it.

While at it drop doubled empty line before pdev_sort_resources().

No functional changes intended.

Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20230330162434.35055-4-andriy.shevchenko@linux.intel.com
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Krzysztof Wilczyński <kw@linux.com>
Stable-dep-of: 11721c45a826 ("PCI: Use resource_set_range() that correctly sets ->end")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
.clang-format | 1 +
arch/alpha/kernel/pci.c | 5 ++--
arch/arm/kernel/bios32.c | 16 ++++++-------
arch/arm/mach-dove/pcie.c | 10 ++++----
arch/arm/mach-mv78xx0/pcie.c | 10 ++++----
arch/arm/mach-orion5x/pci.c | 10 ++++----
arch/mips/pci/ops-bcm63xx.c | 8 +++----
arch/mips/pci/pci-legacy.c | 3 +--
arch/powerpc/kernel/pci-common.c | 21 ++++++++--------
arch/powerpc/platforms/4xx/pci.c | 8 +++----
arch/powerpc/platforms/52xx/mpc52xx_pci.c | 5 ++--
arch/powerpc/platforms/pseries/pci.c | 16 ++++++-------
arch/sh/drivers/pci/pcie-sh7786.c | 10 ++++----
arch/sparc/kernel/leon_pci.c | 5 ++--
arch/sparc/kernel/pci.c | 10 ++++----
arch/sparc/kernel/pcic.c | 5 ++--
drivers/pci/remove.c | 5 ++--
drivers/pci/setup-bus.c | 27 ++++++++-------------
drivers/pci/setup-res.c | 4 +---
drivers/pci/vgaarb.c | 17 ++++---------
drivers/pci/xen-pcifront.c | 4 +---
drivers/pnp/quirks.c | 29 ++++++++---------------
include/linux/pci.h | 14 +++++++++++
23 files changed, 111 insertions(+), 132 deletions(-)

diff --git a/.clang-format b/.clang-format
index 8d01225bfcb7d..d4e2dcb76609a 100644
--- a/.clang-format
+++ b/.clang-format
@@ -516,6 +516,7 @@ ForEachMacros:
- 'of_property_for_each_string'
- 'of_property_for_each_u32'
- 'pci_bus_for_each_resource'
+ - 'pci_dev_for_each_resource'
- 'pci_doe_for_each_off'
- 'pcl_for_each_chunk'
- 'pcl_for_each_segment'
diff --git a/arch/alpha/kernel/pci.c b/arch/alpha/kernel/pci.c
index 64fbfb0763b29..4458eb7f44f0c 100644
--- a/arch/alpha/kernel/pci.c
+++ b/arch/alpha/kernel/pci.c
@@ -288,11 +288,10 @@ pcibios_claim_one_bus(struct pci_bus *b)
struct pci_bus *child_bus;

list_for_each_entry(dev, &b->devices, bus_list) {
+ struct resource *r;
int i;

- for (i = 0; i < PCI_NUM_RESOURCES; i++) {
- struct resource *r = &dev->resource[i];
-
+ pci_dev_for_each_resource(dev, r, i) {
if (r->parent || !r->start || !r->flags)
continue;
if (pci_has_flag(PCI_PROBE_ONLY) ||
diff --git a/arch/arm/kernel/bios32.c b/arch/arm/kernel/bios32.c
index e7ef2b5bea9c2..d334c7fb672b7 100644
--- a/arch/arm/kernel/bios32.c
+++ b/arch/arm/kernel/bios32.c
@@ -142,15 +142,15 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_WINBOND2, PCI_DEVICE_ID_WINBOND2_89C940F,
*/
static void pci_fixup_dec21285(struct pci_dev *dev)
{
- int i;
-
if (dev->devfn == 0) {
+ struct resource *r;
+
dev->class &= 0xff;
dev->class |= PCI_CLASS_BRIDGE_HOST << 8;
- for (i = 0; i < PCI_NUM_RESOURCES; i++) {
- dev->resource[i].start = 0;
- dev->resource[i].end = 0;
- dev->resource[i].flags = 0;
+ pci_dev_for_each_resource(dev, r) {
+ r->start = 0;
+ r->end = 0;
+ r->flags = 0;
}
}
}
@@ -162,13 +162,11 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_DEC_21285, pci_fixup_d
static void pci_fixup_ide_bases(struct pci_dev *dev)
{
struct resource *r;
- int i;

if ((dev->class >> 8) != PCI_CLASS_STORAGE_IDE)
return;

- for (i = 0; i < PCI_NUM_RESOURCES; i++) {
- r = dev->resource + i;
+ pci_dev_for_each_resource(dev, r) {
if ((r->start & ~0x80) == 0x374) {
r->start |= 2;
r->end = r->start;
diff --git a/arch/arm/mach-dove/pcie.c b/arch/arm/mach-dove/pcie.c
index 754ca381f600a..3044b7e038901 100644
--- a/arch/arm/mach-dove/pcie.c
+++ b/arch/arm/mach-dove/pcie.c
@@ -142,14 +142,14 @@ static struct pci_ops pcie_ops = {
static void rc_pci_fixup(struct pci_dev *dev)
{
if (dev->bus->parent == NULL && dev->devfn == 0) {
- int i;
+ struct resource *r;

dev->class &= 0xff;
dev->class |= PCI_CLASS_BRIDGE_HOST << 8;
- for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
- dev->resource[i].start = 0;
- dev->resource[i].end = 0;
- dev->resource[i].flags = 0;
+ pci_dev_for_each_resource(dev, r) {
+ r->start = 0;
+ r->end = 0;
+ r->flags = 0;
}
}
}
diff --git a/arch/arm/mach-mv78xx0/pcie.c b/arch/arm/mach-mv78xx0/pcie.c
index 6190f538a124f..0ebc909ea273f 100644
--- a/arch/arm/mach-mv78xx0/pcie.c
+++ b/arch/arm/mach-mv78xx0/pcie.c
@@ -186,14 +186,14 @@ static struct pci_ops pcie_ops = {
static void rc_pci_fixup(struct pci_dev *dev)
{
if (dev->bus->parent == NULL && dev->devfn == 0) {
- int i;
+ struct resource *r;

dev->class &= 0xff;
dev->class |= PCI_CLASS_BRIDGE_HOST << 8;
- for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
- dev->resource[i].start = 0;
- dev->resource[i].end = 0;
- dev->resource[i].flags = 0;
+ pci_dev_for_each_resource(dev, r) {
+ r->start = 0;
+ r->end = 0;
+ r->flags = 0;
}
}
}
diff --git a/arch/arm/mach-orion5x/pci.c b/arch/arm/mach-orion5x/pci.c
index 888fdc9099c52..3313bc5a63ea6 100644
--- a/arch/arm/mach-orion5x/pci.c
+++ b/arch/arm/mach-orion5x/pci.c
@@ -522,14 +522,14 @@ static int __init pci_setup(struct pci_sys_data *sys)
static void rc_pci_fixup(struct pci_dev *dev)
{
if (dev->bus->parent == NULL && dev->devfn == 0) {
- int i;
+ struct resource *r;

dev->class &= 0xff;
dev->class |= PCI_CLASS_BRIDGE_HOST << 8;
- for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
- dev->resource[i].start = 0;
- dev->resource[i].end = 0;
- dev->resource[i].flags = 0;
+ pci_dev_for_each_resource(dev, r) {
+ r->start = 0;
+ r->end = 0;
+ r->flags = 0;
}
}
}
diff --git a/arch/mips/pci/ops-bcm63xx.c b/arch/mips/pci/ops-bcm63xx.c
index dc6dc2741272e..b0ea023c47c02 100644
--- a/arch/mips/pci/ops-bcm63xx.c
+++ b/arch/mips/pci/ops-bcm63xx.c
@@ -413,18 +413,18 @@ struct pci_ops bcm63xx_cb_ops = {
static void bcm63xx_fixup(struct pci_dev *dev)
{
static int io_window = -1;
- int i, found, new_io_window;
+ int found, new_io_window;
+ struct resource *r;
u32 val;

/* look for any io resource */
found = 0;
- for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
- if (pci_resource_flags(dev, i) & IORESOURCE_IO) {
+ pci_dev_for_each_resource(dev, r) {
+ if (resource_type(r) == IORESOURCE_IO) {
found = 1;
break;
}
}
-
if (!found)
return;

diff --git a/arch/mips/pci/pci-legacy.c b/arch/mips/pci/pci-legacy.c
index 468722c8a5c61..ec2567f8efd83 100644
--- a/arch/mips/pci/pci-legacy.c
+++ b/arch/mips/pci/pci-legacy.c
@@ -249,12 +249,11 @@ static int pcibios_enable_resources(struct pci_dev *dev, int mask)

pci_read_config_word(dev, PCI_COMMAND, &cmd);
old_cmd = cmd;
- for (idx = 0; idx < PCI_NUM_RESOURCES; idx++) {
+ pci_dev_for_each_resource(dev, r, idx) {
/* Only set up the requested stuff */
if (!(mask & (1<<idx)))
continue;

- r = &dev->resource[idx];
if (!(r->flags & (IORESOURCE_IO | IORESOURCE_MEM)))
continue;
if ((idx == PCI_ROM_RESOURCE) &&
diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c
index d67cf79bf5d03..e88d7c9feeec3 100644
--- a/arch/powerpc/kernel/pci-common.c
+++ b/arch/powerpc/kernel/pci-common.c
@@ -880,6 +880,7 @@ int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge)
static void pcibios_fixup_resources(struct pci_dev *dev)
{
struct pci_controller *hose = pci_bus_to_host(dev->bus);
+ struct resource *res;
int i;

if (!hose) {
@@ -891,9 +892,9 @@ static void pcibios_fixup_resources(struct pci_dev *dev)
if (dev->is_virtfn)
return;

- for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
- struct resource *res = dev->resource + i;
+ pci_dev_for_each_resource(dev, res, i) {
struct pci_bus_region reg;
+
if (!res->flags)
continue;

@@ -1452,11 +1453,10 @@ void pcibios_claim_one_bus(struct pci_bus *bus)
struct pci_bus *child_bus;

list_for_each_entry(dev, &bus->devices, bus_list) {
+ struct resource *r;
int i;

- for (i = 0; i < PCI_NUM_RESOURCES; i++) {
- struct resource *r = &dev->resource[i];
-
+ pci_dev_for_each_resource(dev, r, i) {
if (r->parent || !r->start || !r->flags)
continue;

@@ -1705,19 +1705,20 @@ EXPORT_SYMBOL_GPL(pcibios_scan_phb);

static void fixup_hide_host_resource_fsl(struct pci_dev *dev)
{
- int i, class = dev->class >> 8;
+ int class = dev->class >> 8;
/* When configured as agent, programming interface = 1 */
int prog_if = dev->class & 0xf;
+ struct resource *r;

if ((class == PCI_CLASS_PROCESSOR_POWERPC ||
class == PCI_CLASS_BRIDGE_OTHER) &&
(dev->hdr_type == PCI_HEADER_TYPE_NORMAL) &&
(prog_if == 0) &&
(dev->bus->parent == NULL)) {
- for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
- dev->resource[i].start = 0;
- dev->resource[i].end = 0;
- dev->resource[i].flags = 0;
+ pci_dev_for_each_resource(dev, r) {
+ r->start = 0;
+ r->end = 0;
+ r->flags = 0;
}
}
}
diff --git a/arch/powerpc/platforms/4xx/pci.c b/arch/powerpc/platforms/4xx/pci.c
index ca5dd7a5842ac..07dcc2b8007f9 100644
--- a/arch/powerpc/platforms/4xx/pci.c
+++ b/arch/powerpc/platforms/4xx/pci.c
@@ -57,7 +57,7 @@ static inline int ppc440spe_revA(void)
static void fixup_ppc4xx_pci_bridge(struct pci_dev *dev)
{
struct pci_controller *hose;
- int i;
+ struct resource *r;

if (dev->devfn != 0 || dev->bus->self != NULL)
return;
@@ -79,9 +79,9 @@ static void fixup_ppc4xx_pci_bridge(struct pci_dev *dev)
/* Hide the PCI host BARs from the kernel as their content doesn't
* fit well in the resource management
*/
- for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
- dev->resource[i].start = dev->resource[i].end = 0;
- dev->resource[i].flags = 0;
+ pci_dev_for_each_resource(dev, r) {
+ r->start = r->end = 0;
+ r->flags = 0;
}

printk(KERN_INFO "PCI: Hiding 4xx host bridge resources %s\n",
diff --git a/arch/powerpc/platforms/52xx/mpc52xx_pci.c b/arch/powerpc/platforms/52xx/mpc52xx_pci.c
index 859e2818c43d5..0ca4401ba7819 100644
--- a/arch/powerpc/platforms/52xx/mpc52xx_pci.c
+++ b/arch/powerpc/platforms/52xx/mpc52xx_pci.c
@@ -327,14 +327,13 @@ mpc52xx_pci_setup(struct pci_controller *hose,
static void
mpc52xx_pci_fixup_resources(struct pci_dev *dev)
{
- int i;
+ struct resource *res;

pr_debug("%s() %.4x:%.4x\n", __func__, dev->vendor, dev->device);

/* We don't rely on boot loader for PCI and resets all
devices */
- for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
- struct resource *res = &dev->resource[i];
+ pci_dev_for_each_resource(dev, res) {
if (res->end > res->start) { /* Only valid resources */
res->end -= res->start;
res->start = 0;
diff --git a/arch/powerpc/platforms/pseries/pci.c b/arch/powerpc/platforms/pseries/pci.c
index 6e671c3809ecf..f6cd534797864 100644
--- a/arch/powerpc/platforms/pseries/pci.c
+++ b/arch/powerpc/platforms/pseries/pci.c
@@ -240,7 +240,7 @@ void __init pSeries_final_fixup(void)
*/
static void fixup_winbond_82c105(struct pci_dev* dev)
{
- int i;
+ struct resource *r;
unsigned int reg;

if (!machine_is(pseries))
@@ -251,14 +251,14 @@ static void fixup_winbond_82c105(struct pci_dev* dev)
/* Enable LEGIRQ to use INTC instead of ISA interrupts */
pci_write_config_dword(dev, 0x40, reg | (1<<11));

- for (i = 0; i < DEVICE_COUNT_RESOURCE; ++i) {
+ pci_dev_for_each_resource(dev, r) {
/* zap the 2nd function of the winbond chip */
- if (dev->resource[i].flags & IORESOURCE_IO
- && dev->bus->number == 0 && dev->devfn == 0x81)
- dev->resource[i].flags &= ~IORESOURCE_IO;
- if (dev->resource[i].start == 0 && dev->resource[i].end) {
- dev->resource[i].flags = 0;
- dev->resource[i].end = 0;
+ if (dev->bus->number == 0 && dev->devfn == 0x81 &&
+ r->flags & IORESOURCE_IO)
+ r->flags &= ~IORESOURCE_IO;
+ if (r->start == 0 && r->end) {
+ r->flags = 0;
+ r->end = 0;
}
}
}
diff --git a/arch/sh/drivers/pci/pcie-sh7786.c b/arch/sh/drivers/pci/pcie-sh7786.c
index b0c2a5238d049..4f5e49f10805e 100644
--- a/arch/sh/drivers/pci/pcie-sh7786.c
+++ b/arch/sh/drivers/pci/pcie-sh7786.c
@@ -140,12 +140,12 @@ static void sh7786_pci_fixup(struct pci_dev *dev)
* Prevent enumeration of root complex resources.
*/
if (pci_is_root_bus(dev->bus) && dev->devfn == 0) {
- int i;
+ struct resource *r;

- for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
- dev->resource[i].start = 0;
- dev->resource[i].end = 0;
- dev->resource[i].flags = 0;
+ pci_dev_for_each_resource(dev, r) {
+ r->start = 0;
+ r->end = 0;
+ r->flags = 0;
}
}
}
diff --git a/arch/sparc/kernel/leon_pci.c b/arch/sparc/kernel/leon_pci.c
index 3a73bc466f95d..8de6646e9ce85 100644
--- a/arch/sparc/kernel/leon_pci.c
+++ b/arch/sparc/kernel/leon_pci.c
@@ -63,15 +63,14 @@ void leon_pci_init(struct platform_device *ofdev, struct leon_pci_info *info)

int pcibios_enable_device(struct pci_dev *dev, int mask)
{
+ struct resource *res;
u16 cmd, oldcmd;
int i;

pci_read_config_word(dev, PCI_COMMAND, &cmd);
oldcmd = cmd;

- for (i = 0; i < PCI_NUM_RESOURCES; i++) {
- struct resource *res = &dev->resource[i];
-
+ pci_dev_for_each_resource(dev, res, i) {
/* Only set up the requested stuff */
if (!(mask & (1<<i)))
continue;
diff --git a/arch/sparc/kernel/pci.c b/arch/sparc/kernel/pci.c
index 5637b37ba9114..f66005ce4cb56 100644
--- a/arch/sparc/kernel/pci.c
+++ b/arch/sparc/kernel/pci.c
@@ -664,11 +664,10 @@ static void pci_claim_bus_resources(struct pci_bus *bus)
struct pci_dev *dev;

list_for_each_entry(dev, &bus->devices, bus_list) {
+ struct resource *r;
int i;

- for (i = 0; i < PCI_NUM_RESOURCES; i++) {
- struct resource *r = &dev->resource[i];
-
+ pci_dev_for_each_resource(dev, r, i) {
if (r->parent || !r->start || !r->flags)
continue;

@@ -725,15 +724,14 @@ struct pci_bus *pci_scan_one_pbm(struct pci_pbm_info *pbm,

int pcibios_enable_device(struct pci_dev *dev, int mask)
{
+ struct resource *res;
u16 cmd, oldcmd;
int i;

pci_read_config_word(dev, PCI_COMMAND, &cmd);
oldcmd = cmd;

- for (i = 0; i < PCI_NUM_RESOURCES; i++) {
- struct resource *res = &dev->resource[i];
-
+ pci_dev_for_each_resource(dev, res, i) {
/* Only set up the requested stuff */
if (!(mask & (1<<i)))
continue;
diff --git a/arch/sparc/kernel/pcic.c b/arch/sparc/kernel/pcic.c
index ee4c9a9a171cc..25fe0a0617325 100644
--- a/arch/sparc/kernel/pcic.c
+++ b/arch/sparc/kernel/pcic.c
@@ -643,15 +643,14 @@ void pcibios_fixup_bus(struct pci_bus *bus)

int pcibios_enable_device(struct pci_dev *dev, int mask)
{
+ struct resource *res;
u16 cmd, oldcmd;
int i;

pci_read_config_word(dev, PCI_COMMAND, &cmd);
oldcmd = cmd;

- for (i = 0; i < PCI_NUM_RESOURCES; i++) {
- struct resource *res = &dev->resource[i];
-
+ pci_dev_for_each_resource(dev, res, i) {
/* Only set up the requested stuff */
if (!(mask & (1<<i)))
continue;
diff --git a/drivers/pci/remove.c b/drivers/pci/remove.c
index 22d39e12b236a..30a787d45d2e5 100644
--- a/drivers/pci/remove.c
+++ b/drivers/pci/remove.c
@@ -5,10 +5,9 @@

static void pci_free_resources(struct pci_dev *dev)
{
- int i;
+ struct resource *res;

- for (i = 0; i < PCI_NUM_RESOURCES; i++) {
- struct resource *res = dev->resource + i;
+ pci_dev_for_each_resource(dev, res) {
if (res->parent)
release_resource(res);
}
diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index 3ce68adda9b7c..05cebc39f7642 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -124,20 +124,17 @@ static resource_size_t get_res_add_align(struct list_head *head,
return dev_res ? dev_res->min_align : 0;
}

-
/* Sort resources by alignment */
static void pdev_sort_resources(struct pci_dev *dev, struct list_head *head)
{
+ struct resource *r;
int i;

- for (i = 0; i < PCI_NUM_RESOURCES; i++) {
- struct resource *r;
+ pci_dev_for_each_resource(dev, r, i) {
struct pci_dev_resource *dev_res, *tmp;
resource_size_t r_align;
struct list_head *n;

- r = &dev->resource[i];
-
if (r->flags & IORESOURCE_PCI_FIXED)
continue;

@@ -891,10 +888,9 @@ static void pbus_size_io(struct pci_bus *bus, resource_size_t min_size,

min_align = window_alignment(bus, IORESOURCE_IO);
list_for_each_entry(dev, &bus->devices, bus_list) {
- int i;
+ struct resource *r;

- for (i = 0; i < PCI_NUM_RESOURCES; i++) {
- struct resource *r = &dev->resource[i];
+ pci_dev_for_each_resource(dev, r) {
unsigned long r_size;

if (r->parent || !(r->flags & IORESOURCE_IO))
@@ -1010,10 +1006,10 @@ static int pbus_size_mem(struct pci_bus *bus, unsigned long mask,
size = 0;

list_for_each_entry(dev, &bus->devices, bus_list) {
+ struct resource *r;
int i;

- for (i = 0; i < PCI_NUM_RESOURCES; i++) {
- struct resource *r = &dev->resource[i];
+ pci_dev_for_each_resource(dev, r, i) {
resource_size_t r_size;

if (r->parent || (r->flags & IORESOURCE_PCI_FIXED) ||
@@ -1354,11 +1350,10 @@ static void assign_fixed_resource_on_bus(struct pci_bus *b, struct resource *r)
*/
static void pdev_assign_fixed_resources(struct pci_dev *dev)
{
- int i;
+ struct resource *r;

- for (i = 0; i < PCI_NUM_RESOURCES; i++) {
+ pci_dev_for_each_resource(dev, r) {
struct pci_bus *b;
- struct resource *r = &dev->resource[i];

if (r->parent || !(r->flags & IORESOURCE_PCI_FIXED) ||
!(r->flags & (IORESOURCE_IO | IORESOURCE_MEM)))
@@ -1791,11 +1786,9 @@ static void remove_dev_resources(struct pci_dev *dev, struct resource *io,
struct resource *mmio,
struct resource *mmio_pref)
{
- int i;
-
- for (i = 0; i < PCI_NUM_RESOURCES; i++) {
- struct resource *res = &dev->resource[i];
+ struct resource *res;

+ pci_dev_for_each_resource(dev, res) {
if (resource_type(res) == IORESOURCE_IO) {
remove_dev_resource(io, dev, res);
} else if (resource_type(res) == IORESOURCE_MEM) {
diff --git a/drivers/pci/setup-res.c b/drivers/pci/setup-res.c
index b492e67c3d871..967f9a7589239 100644
--- a/drivers/pci/setup-res.c
+++ b/drivers/pci/setup-res.c
@@ -484,12 +484,10 @@ int pci_enable_resources(struct pci_dev *dev, int mask)
pci_read_config_word(dev, PCI_COMMAND, &cmd);
old_cmd = cmd;

- for (i = 0; i < PCI_NUM_RESOURCES; i++) {
+ pci_dev_for_each_resource(dev, r, i) {
if (!(mask & (1 << i)))
continue;

- r = &dev->resource[i];
-
if (!(r->flags & (IORESOURCE_IO | IORESOURCE_MEM)))
continue;
if ((i == PCI_ROM_RESOURCE) &&
diff --git a/drivers/pci/vgaarb.c b/drivers/pci/vgaarb.c
index f80b6ec88dc30..5a696078b382b 100644
--- a/drivers/pci/vgaarb.c
+++ b/drivers/pci/vgaarb.c
@@ -548,10 +548,8 @@ static bool vga_is_firmware_default(struct pci_dev *pdev)
#if defined(CONFIG_X86) || defined(CONFIG_IA64)
u64 base = screen_info.lfb_base;
u64 size = screen_info.lfb_size;
+ struct resource *r;
u64 limit;
- resource_size_t start, end;
- unsigned long flags;
- int i;

/* Select the device owning the boot framebuffer if there is one */

@@ -561,19 +559,14 @@ static bool vga_is_firmware_default(struct pci_dev *pdev)
limit = base + size;

/* Does firmware framebuffer belong to us? */
- for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
- flags = pci_resource_flags(pdev, i);
-
- if ((flags & IORESOURCE_MEM) == 0)
+ pci_dev_for_each_resource(pdev, r) {
+ if (resource_type(r) != IORESOURCE_MEM)
continue;

- start = pci_resource_start(pdev, i);
- end = pci_resource_end(pdev, i);
-
- if (!start || !end)
+ if (!r->start || !r->end)
continue;

- if (base < start || limit >= end)
+ if (base < r->start || limit >= r->end)
continue;

return true;
diff --git a/drivers/pci/xen-pcifront.c b/drivers/pci/xen-pcifront.c
index fcd029ca2eb18..83c0ab50676df 100644
--- a/drivers/pci/xen-pcifront.c
+++ b/drivers/pci/xen-pcifront.c
@@ -390,9 +390,7 @@ static int pcifront_claim_resource(struct pci_dev *dev, void *data)
int i;
struct resource *r;

- for (i = 0; i < PCI_NUM_RESOURCES; i++) {
- r = &dev->resource[i];
-
+ pci_dev_for_each_resource(dev, r, i) {
if (!r->parent && r->start && r->flags) {
dev_info(&pdev->xdev->dev, "claiming resource %s/%d\n",
pci_name(dev), i);
diff --git a/drivers/pnp/quirks.c b/drivers/pnp/quirks.c
index ac98b9919029c..6085a1471de21 100644
--- a/drivers/pnp/quirks.c
+++ b/drivers/pnp/quirks.c
@@ -229,8 +229,7 @@ static void quirk_ad1815_mpu_resources(struct pnp_dev *dev)
static void quirk_system_pci_resources(struct pnp_dev *dev)
{
struct pci_dev *pdev = NULL;
- struct resource *res;
- resource_size_t pnp_start, pnp_end, pci_start, pci_end;
+ struct resource *res, *r;
int i, j;

/*
@@ -243,32 +242,26 @@ static void quirk_system_pci_resources(struct pnp_dev *dev)
* so they won't be claimed by the PNP system driver.
*/
for_each_pci_dev(pdev) {
- for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
- unsigned long flags, type;
+ pci_dev_for_each_resource(pdev, r, i) {
+ unsigned long type = resource_type(r);

- flags = pci_resource_flags(pdev, i);
- type = flags & (IORESOURCE_IO | IORESOURCE_MEM);
- if (!type || pci_resource_len(pdev, i) == 0)
+ if (!(type == IORESOURCE_IO || type == IORESOURCE_MEM) ||
+ resource_size(r) == 0)
continue;

- if (flags & IORESOURCE_UNSET)
+ if (r->flags & IORESOURCE_UNSET)
continue;

- pci_start = pci_resource_start(pdev, i);
- pci_end = pci_resource_end(pdev, i);
for (j = 0;
(res = pnp_get_resource(dev, type, j)); j++) {
if (res->start == 0 && res->end == 0)
continue;

- pnp_start = res->start;
- pnp_end = res->end;
-
/*
* If the PNP region doesn't overlap the PCI
* region at all, there's no problem.
*/
- if (pnp_end < pci_start || pnp_start > pci_end)
+ if (!resource_overlaps(res, r))
continue;

/*
@@ -278,8 +271,7 @@ static void quirk_system_pci_resources(struct pnp_dev *dev)
* PNP device describes a bridge with PCI
* behind it.
*/
- if (pnp_start <= pci_start &&
- pnp_end >= pci_end)
+ if (res->start <= r->start && res->end >= r->end)
continue;

/*
@@ -288,9 +280,8 @@ static void quirk_system_pci_resources(struct pnp_dev *dev)
* driver from requesting its resources.
*/
dev_warn(&dev->dev,
- "disabling %pR because it overlaps "
- "%s BAR %d %pR\n", res,
- pci_name(pdev), i, &pdev->resource[i]);
+ "disabling %pR because it overlaps %s BAR %d %pR\n",
+ res, pci_name(pdev), i, r);
res->flags |= IORESOURCE_DISABLED;
}
}
diff --git a/include/linux/pci.h b/include/linux/pci.h
index e10b54642b7f2..8b13be1633db1 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -2029,6 +2029,20 @@ int pci_iobar_pfn(struct pci_dev *pdev, int bar, struct vm_area_struct *vma);
(pci_resource_end((dev), (bar)) ? \
resource_size(pci_resource_n((dev), (bar))) : 0)

+#define __pci_dev_for_each_res0(dev, res, ...) \
+ for (unsigned int __b = 0; \
+ res = pci_resource_n(dev, __b), __b < PCI_NUM_RESOURCES; \
+ __b++)
+
+#define __pci_dev_for_each_res1(dev, res, __b) \
+ for (__b = 0; \
+ res = pci_resource_n(dev, __b), __b < PCI_NUM_RESOURCES; \
+ __b++)
+
+#define pci_dev_for_each_resource(dev, res, ...) \
+ CONCATENATE(__pci_dev_for_each_res, COUNT_ARGS(__VA_ARGS__)) \
+ (dev, res, __VA_ARGS__)
+
/*
* Similar to the helpers above, these manipulate per-pci_dev
* driver-specific data. They are really just a wrapper around
--
2.51.0