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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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|---|---|---|
| .. | ||
| common.c | ||
| fixups-cayman.c | ||
| fixups-dreamcast.c | ||
| fixups-landisk.c | ||
| fixups-r7780rp.c | ||
| fixups-rts7751r2d.c | ||
| fixups-sdk7780.c | ||
| fixups-sdk7786.c | ||
| fixups-se7751.c | ||
| fixups-sh03.c | ||
| fixups-snapgear.c | ||
| fixups-titan.c | ||
| Makefile | ||
| ops-dreamcast.c | ||
| ops-sh4.c | ||
| ops-sh5.c | ||
| ops-sh7786.c | ||
| pci-dreamcast.c | ||
| pci-sh4.h | ||
| pci-sh5.c | ||
| pci-sh5.h | ||
| pci-sh7751.c | ||
| pci-sh7751.h | ||
| pci-sh7780.c | ||
| pci-sh7780.h | ||
| pci.c | ||
| pcie-sh7786.c | ||
| pcie-sh7786.h | ||