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> --- This applies on top of this patch I just sent out: https://lore.kernel.org/linux-pci/20221103103254.30497-1-mika.westerberg@xxxxxxxxxxxxxxx/ arch/alpha/kernel/pci.c | 5 ++--- arch/arm/kernel/bios32.c | 13 +++++++------ arch/mips/pci/pci-legacy.c | 3 +-- arch/powerpc/kernel/pci-common.c | 5 ++--- arch/sparc/kernel/leon_pci.c | 5 ++--- arch/sparc/kernel/pci.c | 10 ++++------ arch/sparc/kernel/pcic.c | 5 ++--- drivers/pci/remove.c | 4 ++-- drivers/pci/setup-bus.c | 23 ++++++++++------------- drivers/pci/setup-res.c | 4 +--- drivers/pci/xen-pcifront.c | 4 +--- include/linux/pci.h | 11 +++++++++++ 12 files changed, 45 insertions(+), 47 deletions(-) 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..6135b81c3351 100644 --- a/arch/arm/kernel/bios32.c +++ b/arch/arm/kernel/bios32.c @@ -145,12 +145,14 @@ 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, i) { + r->start = 0; + r->end = 0; + r->flags = 0; } } } @@ -167,8 +169,7 @@ static void pci_fixup_ide_bases(struct pci_dev *dev) 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, i) { if ((r->start & ~0x80) == 0x374) { r->start |= 2; r->end = r->start; 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..8ddcfa6bcb50 100644 --- a/arch/powerpc/kernel/pci-common.c +++ b/arch/powerpc/kernel/pci-common.c @@ -1452,11 +1452,10 @@ 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; 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 4c54c75050dc..dee2dcb60339 100644 --- a/drivers/pci/remove.c +++ b/drivers/pci/remove.c @@ -5,10 +5,10 @@ static void pci_free_resources(struct pci_dev *dev) { + struct resource *res; int i; - for (i = 0; i < PCI_NUM_RESOURCES; i++) { - struct resource *res = dev->resource + i; + pci_dev_for_each_resource(dev, res, i) { if (res->parent) release_resource(res); } diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c index e512f9ecb9d0..549283aa31e6 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 +892,10 @@ 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) { + 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) { unsigned long r_size; if (r->parent || !(r->flags & IORESOURCE_IO)) @@ -1014,10 +1011,10 @@ 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 +1355,11 @@ static void assign_fixed_resource_on_bus(struct pci_bus *b, struct resource *r) */ static void pdev_assign_fixed_resources(struct pci_dev *dev) { + struct resource *r; int i; - for (i = 0; i < PCI_NUM_RESOURCES; i++) { + pci_dev_for_each_resource(dev, r, i) { struct pci_bus *b; - struct resource *r = &dev->resource[i]; if (r->parent || !(r->flags & IORESOURCE_PCI_FIXED) || !(r->flags & (IORESOURCE_IO | IORESOURCE_MEM))) @@ -1845,6 +1842,7 @@ static void pci_bus_distribute_available_resources(struct pci_bus *bus, * distributing the rest. */ list_for_each_entry(dev, &bus->devices, bus_list) { + struct resource *dev_res; int i; if (dev == bridge) @@ -1857,8 +1855,7 @@ static void pci_bus_distribute_available_resources(struct pci_bus *bus, if (!dev->multifunction) return; - for (i = 0; i < PCI_NUM_RESOURCES; i++) { - const struct resource *dev_res = &dev->resource[i]; + pci_dev_for_each_resource(dev, dev_res, i) { resource_size_t dev_sz; struct resource *b_res; 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/xen-pcifront.c b/drivers/pci/xen-pcifront.c index 7378e2f3e525..ce485ef59656 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/include/linux/pci.h b/include/linux/pci.h index 2bda4a4e47e8..461ac1ecf6a6 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -1407,6 +1407,17 @@ int pci_request_selected_regions(struct pci_dev *, int, const char *); int pci_request_selected_regions_exclusive(struct pci_dev *, int, const char *); void pci_release_selected_regions(struct pci_dev *, int); +/** + * pci_dev_for_each_resource() - Iterate over each PCI device resource + * @dev: PCI device + * @res: Variable that holds the current resource + * @i: Iterator + */ +#define pci_dev_for_each_resource(dev, res, i) \ + for (i = 0; \ + res = &(dev)->resource[i], i < PCI_NUM_RESOURCES; \ + i++) + /* drivers/pci/bus.c */ void pci_add_resource(struct list_head *resources, struct resource *res); void pci_add_resource_offset(struct list_head *resources, struct resource *res, -- 2.35.1
