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PCI: Cleanup control flow

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Return errors immediately so the straightline path is the normal,
no-error path.  No functional change.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Bjorn Helgaas 2015-03-12 15:07:04 -05:00
parent a0c8a4d9f9
commit 9e808eb6a7
6 changed files with 63 additions and 71 deletions
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12
arch/arm/mach-dove/pcie.c
View File

@ -155,17 +155,13 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL, PCI_ANY_ID, rc_pci_fixup);
static struct pci_bus __init *
dove_pcie_scan_bus(int nr, struct pci_sys_data *sys)
{
struct pci_bus *bus;
if (nr < num_pcie_ports) {
bus = pci_scan_root_bus(NULL, sys->busnr, &pcie_ops, sys,
&sys->resources);
} else {
bus = NULL;
if (nr >= num_pcie_ports) {
BUG();
return NULL;
}
return bus;
return pci_scan_root_bus(NULL, sys->busnr, &pcie_ops, sys,
&sys->resources);
}
static int __init dove_pcie_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)

12
arch/arm/mach-mv78xx0/pcie.c
View File

@ -197,17 +197,13 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MARVELL, PCI_ANY_ID, rc_pci_fixup);
static struct pci_bus __init *
mv78xx0_pcie_scan_bus(int nr, struct pci_sys_data *sys)
{
struct pci_bus *bus;
if (nr < num_pcie_ports) {
bus = pci_scan_root_bus(NULL, sys->busnr, &pcie_ops, sys,
&sys->resources);
} else {
bus = NULL;
if (nr >= num_pcie_ports) {
BUG();
return NULL;
}
return bus;
return pci_scan_root_bus(NULL, sys->busnr, &pcie_ops, sys,
&sys->resources);
}
static int __init mv78xx0_pcie_map_irq(const struct pci_dev *dev, u8 slot,

34
arch/arm/mach-orion5x/pci.c
View File

@ -540,37 +540,33 @@ void __init orion5x_pci_set_cardbus_mode(void)
int __init orion5x_pci_sys_setup(int nr, struct pci_sys_data *sys)
{
int ret = 0;
vga_base = ORION5X_PCIE_MEM_PHYS_BASE;
if (nr == 0) {
orion_pcie_set_local_bus_nr(PCIE_BASE, sys->busnr);
ret = pcie_setup(sys);
} else if (nr == 1 && !orion5x_pci_disabled) {
orion5x_pci_set_bus_nr(sys->busnr);
ret = pci_setup(sys);
return pcie_setup(sys);
}
return ret;
if (nr == 1 && !orion5x_pci_disabled) {
orion5x_pci_set_bus_nr(sys->busnr);
return pci_setup(sys);
}
return 0;
}
struct pci_bus __init *orion5x_pci_sys_scan_bus(int nr, struct pci_sys_data *sys)
{
struct pci_bus *bus;
if (nr == 0)
return pci_scan_root_bus(NULL, sys->busnr, &pcie_ops, sys,
&sys->resources);
if (nr == 0) {
bus = pci_scan_root_bus(NULL, sys->busnr, &pcie_ops, sys,
&sys->resources);
} else if (nr == 1 && !orion5x_pci_disabled) {
bus = pci_scan_root_bus(NULL, sys->busnr, &pci_ops, sys,
&sys->resources);
} else {
bus = NULL;
BUG();
}
if (nr == 1 && !orion5x_pci_disabled)
return pci_scan_root_bus(NULL, sys->busnr, &pci_ops, sys,
&sys->resources);
return bus;
BUG();
return NULL;
}
int __init orion5x_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)

33
arch/mips/pci/pci.c
View File

@ -94,28 +94,29 @@ static void pcibios_scanbus(struct pci_controller *hose)
pci_add_resource_offset(&resources, hose->io_resource, hose->io_offset);
bus = pci_scan_root_bus(NULL, next_busno, hose->pci_ops, hose,
&resources);
if (!bus)
pci_free_resource_list(&resources);
hose->bus = bus;
need_domain_info = need_domain_info || hose->index;
hose->need_domain_info = need_domain_info;
if (bus) {
next_busno = bus->busn_res.end + 1;
/* Don't allow 8-bit bus number overflow inside the hose -
reserve some space for bridges. */
if (next_busno > 224) {
next_busno = 0;
need_domain_info = 1;
}
if (!pci_has_flag(PCI_PROBE_ONLY)) {
pci_bus_size_bridges(bus);
pci_bus_assign_resources(bus);
}
pci_bus_add_devices(bus);
if (!bus) {
pci_free_resource_list(&resources);
return;
}
next_busno = bus->busn_res.end + 1;
/* Don't allow 8-bit bus number overflow inside the hose -
reserve some space for bridges. */
if (next_busno > 224) {
next_busno = 0;
need_domain_info = 1;
}
if (!pci_has_flag(PCI_PROBE_ONLY)) {
pci_bus_size_bridges(bus);
pci_bus_assign_resources(bus);
}
pci_bus_add_devices(bus);
}
#ifdef CONFIG_OF

26
arch/sh/drivers/pci/pci.c
View File

@ -58,21 +58,23 @@ static void pcibios_scanbus(struct pci_channel *hose)
need_domain_info = need_domain_info || hose->index;
hose->need_domain_info = need_domain_info;
if (bus) {
next_busno = bus->busn_res.end + 1;
/* Don't allow 8-bit bus number overflow inside the hose -
reserve some space for bridges. */
if (next_busno > 224) {
next_busno = 0;
need_domain_info = 1;
}
pci_bus_size_bridges(bus);
pci_bus_assign_resources(bus);
pci_bus_add_devices(bus);
} else {
if (!bus) {
pci_free_resource_list(&resources);
return;
}
next_busno = bus->busn_res.end + 1;
/* Don't allow 8-bit bus number overflow inside the hose -
reserve some space for bridges. */
if (next_busno > 224) {
next_busno = 0;
need_domain_info = 1;
}
pci_bus_size_bridges(bus);
pci_bus_assign_resources(bus);
pci_bus_add_devices(bus);
}
/*

17
arch/sparc/kernel/leon_pci.c
View File

@ -34,16 +34,17 @@ void leon_pci_init(struct platform_device *ofdev, struct leon_pci_info *info)
root_bus = pci_scan_root_bus(&ofdev->dev, 0, info->ops, info,
&resources);
if (root_bus) {
/* Setup IRQs of all devices using custom routines */
pci_fixup_irqs(pci_common_swizzle, info->map_irq);
/* Assign devices with resources */
pci_assign_unassigned_resources();
pci_bus_add_devices(root_bus);
} else {
if (!root_bus) {
pci_free_resource_list(&resources);
return;
}
/* Setup IRQs of all devices using custom routines */
pci_fixup_irqs(pci_common_swizzle, info->map_irq);
/* Assign devices with resources */
pci_assign_unassigned_resources();
pci_bus_add_devices(root_bus);
}
void pcibios_fixup_bus(struct pci_bus *pbus)