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[PATCH v8 3/7] PCI: Introduce pci_dev_for_each_resource()



From: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>

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@xxxxxxxxxxxxxxx>
Signed-off-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Reviewed-by: Krzysztof Wilczyński <kw@xxxxxxxxx>
---
 .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                       | 15 ++++++++++++
 23 files changed, 112 insertions(+), 132 deletions(-)

diff --git a/.clang-format b/.clang-format
index d988e9fa9b26..2048b0296d76 100644
--- a/.clang-format
+++ b/.clang-format
@@ -520,6 +520,7 @@ 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 64fbfb0763b2..4458eb7f44f0 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 e7ef2b5bea9c..d334c7fb672b 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 754ca381f600..3044b7e03890 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 6190f538a124..0ebc909ea273 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 888fdc9099c5..3313bc5a63ea 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 dc6dc2741272..b0ea023c47c0 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 468722c8a5c6..ec2567f8efd8 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 d67cf79bf5d0..e88d7c9feeec 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 ca5dd7a5842a..07dcc2b8007f 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 859e2818c43d..0ca4401ba781 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 60e0a58928ef..1772ae3d193d 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 b0c2a5238d04..4f5e49f10805 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 e5e5ff6b9a5c..b6663a3fbae9 100644
--- a/arch/sparc/kernel/leon_pci.c
+++ b/arch/sparc/kernel/leon_pci.c
@@ -62,15 +62,14 @@ 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 cb1ef25116e9..a948a49817c7 100644
--- a/arch/sparc/kernel/pci.c
+++ b/arch/sparc/kernel/pci.c
@@ -663,11 +663,10 @@ 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;
 
@@ -724,15 +723,14 @@ 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 ee4c9a9a171c..25fe0a061732 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 0145aef1b930..c049eddc1e2f 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 c690572b10ce..027b985dd1ee 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;
 
@@ -895,10 +892,9 @@ 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))
@@ -1014,10 +1010,10 @@ 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) ||
@@ -1358,11 +1354,10 @@ 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)))
@@ -1795,11 +1790,9 @@ 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 b492e67c3d87..967f9a758923 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 f80b6ec88dc3..5a696078b382 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 fcd029ca2eb1..83c0ab50676d 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 ac98b9919029..6085a1471de2 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 aeaa95455d4c..5cacd9e4c8cd 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -26,6 +26,7 @@
 
 #include <linux/mod_devicetable.h>
 
+#include <linux/args.h>
 #include <linux/types.h>
 #include <linux/init.h>
 #include <linux/ioport.h>
@@ -2003,6 +2004,20 @@ 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
-- 
2.40.0.1.gaa8946217a0b




 


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