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b97ea289cf
Previously, pci_scan_root_bus() created a root PCI bus, enumerated the
devices on it, and called pci_bus_add_devices(), which made the devices
available for drivers to claim them.
Most callers assigned resources to devices after pci_scan_root_bus()
returns, which may be after drivers have claimed the devices. This is
incorrect; the PCI core should not change device resources while a driver
is managing the device.
Remove pci_bus_add_devices() from pci_scan_root_bus() and do it after any
resource assignment in the callers.
Note that ARM's pci_common_init_dev() already called pci_bus_add_devices()
after pci_scan_root_bus(), so we only need to remove the first call:
pci_common_init_dev
pcibios_init_hw
pci_scan_root_bus
pci_bus_add_devices # first call
pci_bus_assign_resources
pci_bus_add_devices # second call
[bhelgaas: changelog, drop "root_bus" var in alpha common_init_pci(),
return failure earlier in mn10300, add "return" in x86 pcibios_scan_root(),
return early if xtensa platform_pcibios_fixup() fails]
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Richard Henderson <rth@twiddle.net>
CC: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
CC: Matt Turner <mattst88@gmail.com>
CC: David Howells <dhowells@redhat.com>
CC: Tony Luck <tony.luck@intel.com>
CC: Michal Simek <monstr@monstr.eu>
CC: Ralf Baechle <ralf@linux-mips.org>
CC: Koichi Yasutake <yasutake.koichi@jp.panasonic.com>
CC: Sebastian Ott <sebott@linux.vnet.ibm.com>
CC: "David S. Miller" <davem@davemloft.net>
CC: Chris Metcalf <cmetcalf@ezchip.com>
CC: Chris Zankel <chris@zankel.net>
CC: Max Filippov <jcmvbkbc@gmail.com>
CC: Thomas Gleixner <tglx@linutronix.de>
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| .. | ||
| fixup-bcm63xx.c | ||
| fixup-capcella.c | ||
| fixup-cobalt.c | ||
| fixup-emma2rh.c | ||
| fixup-fuloong2e.c | ||
| fixup-ip32.c | ||
| fixup-jmr3927.c | ||
| fixup-lantiq.c | ||
| fixup-lemote2f.c | ||
| fixup-loongson3.c | ||
| fixup-malta.c | ||
| fixup-mpc30x.c | ||
| fixup-pmcmsp.c | ||
| fixup-rbtx4927.c | ||
| fixup-rbtx4938.c | ||
| fixup-rc32434.c | ||
| fixup-sb1250.c | ||
| fixup-sni.c | ||
| fixup-tb0219.c | ||
| fixup-tb0226.c | ||
| fixup-tb0287.c | ||
| Makefile | ||
| msi-octeon.c | ||
| msi-xlp.c | ||
| ops-bcm63xx.c | ||
| ops-bonito64.c | ||
| ops-bridge.c | ||
| ops-emma2rh.c | ||
| ops-gt64xxx_pci0.c | ||
| ops-lantiq.c | ||
| ops-loongson2.c | ||
| ops-loongson3.c | ||
| ops-mace.c | ||
| ops-msc.c | ||
| ops-nile4.c | ||
| ops-pmcmsp.c | ||
| ops-rc32434.c | ||
| ops-sni.c | ||
| ops-tx3927.c | ||
| ops-tx4927.c | ||
| ops-vr41xx.c | ||
| pci-alchemy.c | ||
| pci-ar71xx.c | ||
| pci-ar724x.c | ||
| pci-ar2315.c | ||
| pci-bcm47xx.c | ||
| pci-bcm63xx.c | ||
| pci-bcm63xx.h | ||
| pci-bcm1480.c | ||
| pci-bcm1480ht.c | ||
| pci-emma2rh.c | ||
| pci-ip27.c | ||
| pci-ip32.c | ||
| pci-lantiq.c | ||
| pci-lantiq.h | ||
| pci-lasat.c | ||
| pci-malta.c | ||
| pci-octeon.c | ||
| pci-rc32434.c | ||
| pci-rt2880.c | ||
| pci-rt3883.c | ||
| pci-sb1250.c | ||
| pci-tx4927.c | ||
| pci-tx4938.c | ||
| pci-tx4939.c | ||
| pci-virtio-guest.c | ||
| pci-vr41xx.c | ||
| pci-vr41xx.h | ||
| pci-xlp.c | ||
| pci-xlr.c | ||
| pci.c | ||
| pcie-octeon.c | ||