[PATCH 5/5] PCI: Rip out pci_bus_add_devices() from pci_scan_root_bus()

Yijing Wang
2014-11-19T06:52:14Z

Just like pci_scan_bus(), we also should rip out
pci_bus_add_devices() from pci_scan_root_bus().
Lots platforms first call pci_scan_root_bus(), but
after that, they call pci_bus_size_bridges() and
pci_bus_assign_resources(). Place pci_bus_add_devices()
in pci_scan_root_bus() hurts PCI scan logic.
Should no functional change.

Signed-off-by: Yijing Wang <wangyijing@huawei.com>
CC: linux-alpha@vger.kernel.org
CC: linux-ia64@vger.kernel.org
CC: linux-mips@linux-mips.org
CC: linux-xtensa@linux-xtensa.org
CC: linux-arm-kernel@lists.infradead.org
CC: linux-sh@vger.kernel.org
CC: sparclinux@vger.kernel.org
---
arch/alpha/kernel/pci.c | 2 ++
arch/frv/mb93090-mb00/pci-vdk.c | 6 ++++--
arch/ia64/sn/kernel/io_init.c | 1 +
arch/microblaze/pci/pci-common.c | 1 +
arch/mips/pci/pci.c | 1 +
arch/mn10300/unit-asb2305/pci.c | 5 ++++-
arch/s390/pci/pci.c | 2 +-
arch/sh/drivers/pci/pci.c | 1 +
arch/sparc/kernel/leon_pci.c | 1 +
arch/tile/kernel/pci.c | 2 ++
arch/tile/kernel/pci_gx.c | 2 ++
arch/x86/pci/common.c | 1 +
arch/xtensa/kernel/pci.c | 2 ++
drivers/pci/host/pci-xgene.c | 1 +
drivers/pci/probe.c | 1 -
15 files changed, 24 insertions(+), 5 deletions(-)

diff --git a/arch/alpha/kernel/pci.c b/arch/alpha/kernel/pci.c
index 076c35c..97f9730 100644
--- a/arch/alpha/kernel/pci.c
+++ b/arch/alpha/kernel/pci.c
@@ -334,6 +334,8 @@ common_init_pci(void)

bus = pci_scan_root_bus(NULL, next_busno, alpha_mv.pci_ops,
hose, &resources);
+ if (bus)
+ pci_bus_add_devices(bus);
hose->bus = bus;
hose->need_domain_info = need_domain_info;
next_busno = bus->busn_res.end + 1;
diff --git a/arch/frv/mb93090-mb00/pci-vdk.c b/arch/frv/mb93090-mb00/pci-vdk.c
index efa5d65..2b36044 100644
--- a/arch/frv/mb93090-mb00/pci-vdk.c
+++ b/arch/frv/mb93090-mb00/pci-vdk.c
@@ -316,6 +316,7 @@ void pcibios_fixup_bus(struct pci_bus *bus)

int __init pcibios_init(void)
{
+ struct pci_bus *bus;
struct pci_ops *dir = NULL;
LIST_HEAD(resources);

@@ -383,12 +384,13 @@ int __init pcibios_init(void)
printk("PCI: Probing PCI hardware\n");
pci_add_resource(&resources, &pci_ioport_resource);
pci_add_resource(&resources, &pci_iomem_resource);
- pci_scan_root_bus(NULL, 0, pci_root_ops, NULL, &resources);
+ bus = pci_scan_root_bus(NULL, 0, pci_root_ops, NULL, &resources);

pcibios_irq_init();
pcibios_fixup_irqs();
pcibios_resource_survey();
-
+ if (bus)
+ pci_bus_add_devices(bus);
return 0;
}

diff --git a/arch/ia64/sn/kernel/io_init.c b/arch/ia64/sn/kernel/io_init.c
index 0b5ce82..63b43a6 100644
--- a/arch/ia64/sn/kernel/io_init.c
+++ b/arch/ia64/sn/kernel/io_init.c
@@ -272,6 +272,7 @@ sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus)
kfree(res);
kfree(controller);
}
+ pci_bus_add_devices(bus);
}

/*
diff --git a/arch/microblaze/pci/pci-common.c b/arch/microblaze/pci/pci-common.c
index 9037914..651e25d 100644
--- a/arch/microblaze/pci/pci-common.c
+++ b/arch/microblaze/pci/pci-common.c
@@ -1346,6 +1346,7 @@ static void pcibios_scan_phb(struct pci_controller *hose)
hose->bus = bus;

hose->last_busno = bus->busn_res.end;
+ pci_bus_add_devices(bus);
}

static int __init pcibios_init(void)
diff --git a/arch/mips/pci/pci.c b/arch/mips/pci/pci.c
index 1bf60b1..f083688 100644
--- a/arch/mips/pci/pci.c
+++ b/arch/mips/pci/pci.c
@@ -113,6 +113,7 @@ static void pcibios_scanbus(struct pci_controller *hose)
if (!pci_has_flag(PCI_PROBE_ONLY)) {
pci_bus_size_bridges(bus);
pci_bus_assign_resources(bus);
+ pci_bus_add_devices(bus);
}
}
}
diff --git a/arch/mn10300/unit-asb2305/pci.c b/arch/mn10300/unit-asb2305/pci.c
index 6b4339f..860aa35 100644
--- a/arch/mn10300/unit-asb2305/pci.c
+++ b/arch/mn10300/unit-asb2305/pci.c
@@ -345,6 +345,7 @@ void pcibios_fixup_bus(struct pci_bus *bus)
*/
static int __init pcibios_init(void)
{
+ struct pci_bus *bus;
resource_size_t io_offset, mem_offset;
LIST_HEAD(resources);

@@ -376,11 +377,13 @@ static int __init pcibios_init(void)

pci_add_resource_offset(&resources, &pci_ioport_resource, io_offset);
pci_add_resource_offset(&resources, &pci_iomem_resource, mem_offset);
- pci_scan_root_bus(NULL, 0, &pci_direct_ampci, NULL, &resources);
+ bus = pci_scan_root_bus(NULL, 0, &pci_direct_ampci, NULL, &resources);

pcibios_irq_init();
pcibios_fixup_irqs();
pcibios_resource_survey();
+ if (bus)
+ pci_bus_add_devices(bus);
return 0;
}

diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c
index 552b990..98247f8 100644
--- a/arch/s390/pci/pci.c
+++ b/arch/s390/pci/pci.c
@@ -755,7 +755,7 @@ static int zpci_scan_bus(struct zpci_dev *zdev)
zpci_cleanup_bus_resources(zdev);
return -EIO;
}
-
+ pci_bus_add_devices(zdev->bus);
zdev->bus->max_bus_speed = zdev->max_bus_speed;
return 0;
}
diff --git a/arch/sh/drivers/pci/pci.c b/arch/sh/drivers/pci/pci.c
index 1bc09ee..efc1051 100644
--- a/arch/sh/drivers/pci/pci.c
+++ b/arch/sh/drivers/pci/pci.c
@@ -69,6 +69,7 @@ static void pcibios_scanbus(struct pci_channel *hose)

pci_bus_size_bridges(bus);
pci_bus_assign_resources(bus);
+ pci_bus_add_devices(bus);
} else {
pci_free_resource_list(&resources);
}
diff --git a/arch/sparc/kernel/leon_pci.c b/arch/sparc/kernel/leon_pci.c
index 899b720..2971076 100644
--- a/arch/sparc/kernel/leon_pci.c
+++ b/arch/sparc/kernel/leon_pci.c
@@ -40,6 +40,7 @@ void leon_pci_init(struct platform_device *ofdev, struct leon_pci_info *info)

/* Assign devices with resources */
pci_assign_unassigned_resources();
+ pci_bus_add_devices(root_bus);
} else {
pci_free_resource_list(&resources);
}
diff --git a/arch/tile/kernel/pci.c b/arch/tile/kernel/pci.c
index 1f80a88..007466e 100644
--- a/arch/tile/kernel/pci.c
+++ b/arch/tile/kernel/pci.c
@@ -308,6 +308,8 @@ int __init pcibios_init(void)
pci_add_resource(&resources, &iomem_resource);
bus = pci_scan_root_bus(NULL, 0, controller->ops,
controller, &resources);
+ if (bus)
+ pci_bus_add_devices(bus);
controller->root_bus = bus;
controller->last_busno = bus->busn_res.end;
}
diff --git a/arch/tile/kernel/pci_gx.c b/arch/tile/kernel/pci_gx.c
index e39f9c5..3f8fb2c 100644
--- a/arch/tile/kernel/pci_gx.c
+++ b/arch/tile/kernel/pci_gx.c
@@ -889,6 +889,8 @@ int __init pcibios_init(void)
controller->first_busno = next_busno;
bus = pci_scan_root_bus(NULL, next_busno, controller->ops,
controller, &resources);
+ if (bus)
+ pci_bus_add_devices(bus);
controller->root_bus = bus;
next_busno = bus->busn_res.end + 1;
}
diff --git a/arch/x86/pci/common.c b/arch/x86/pci/common.c
index 7b20bcc..300d39e 100644
--- a/arch/x86/pci/common.c
+++ b/arch/x86/pci/common.c
@@ -475,6 +475,7 @@ void pcibios_scan_root(int busnum)
pci_free_resource_list(&resources);
kfree(sd);
}
+ pci_bus_add_devices(bus);
}

void __init pcibios_set_cache_line_size(void)
diff --git a/arch/xtensa/kernel/pci.c b/arch/xtensa/kernel/pci.c
index 5b34033..f2ae64e 100644
--- a/arch/xtensa/kernel/pci.c
+++ b/arch/xtensa/kernel/pci.c
@@ -185,6 +185,8 @@ static int __init pcibios_init(void)
pci_controller_apertures(pci_ctrl, &resources);
bus = pci_scan_root_bus(NULL, pci_ctrl->first_busno,
pci_ctrl->ops, pci_ctrl, &resources);
+ if (bus)
+ pci_bus_add_devices(bus);
pci_ctrl->bus = bus;
pci_ctrl->last_busno = bus->busn_res.end;
if (next_busno <= pci_ctrl->last_busno)
diff --git a/drivers/pci/host/pci-xgene.c b/drivers/pci/host/pci-xgene.c
index 9ecabfa..c17afe5 100644
--- a/drivers/pci/host/pci-xgene.c
+++ b/drivers/pci/host/pci-xgene.c
@@ -635,6 +635,7 @@ static int xgene_pcie_probe_bridge(struct platform_device *pdev)
if (!bus)
return -ENOMEM;

+ pci_bus_add_devices(bus);
platform_set_drvdata(pdev, port);
return 0;
}
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 79775b5..2ab5a40 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -2084,7 +2084,6 @@ struct pci_bus *pci_scan_root_bus(struct device *parent, int bus,
if (!found)
pci_bus_update_busn_res_end(b, max);

- pci_bus_add_devices(b);
return b;
}
EXPORT_SYMBOL(pci_scan_root_bus);
--
1.7.1