kernel/git/stable/linux.git/drivers/pci/probe.c, branch linux-3.3.y

PCI: workaround hard-wired bus number V2

2012-02-10T19:34:42+00:00

Fixes PCI device detection on IBM xSeries IBM 3850 M2 / x3950 M2 when using ACPI resources (_CRS). This is default, a manual workaround (without this patch) would be pci=nocrs boot param. V2: Add dev_warn if the workaround is hit. This should reveal how common such setups are (via google) and point to possible problems if things are still not working as expected. -> Suggested by Jan Beulich. Cc: stable@vger.kernel.org Tested-by: garyhade@us.ibm.com Signed-off-by: Yinghai Lu Signed-off-by: Jesse Barnes

PCI: remove pci_create_bus()

2012-01-06T20:11:15+00:00

All users of pci_create_bus() have been converted to pci_create_root_bus(), so remove it. Signed-off-by: Bjorn Helgaas Signed-off-by: Jesse Barnes

PCI: deprecate pci_scan_bus_parented()

2012-01-06T20:10:55+00:00

Users of pci_scan_bus_parented() should be converted to use either pci_scan_root_bus() (preferred, but also calls pci_bus_add_devices) or pci_create_root_bus() pci_scan_child_bus() Since pci_scan_bus_parented(), I'm marking it deprecated now and will actually remove it later. Signed-off-by: Bjorn Helgaas Signed-off-by: Jesse Barnes

PCI: convert pci_scan_bus_parented() to use pci_create_root_bus()

2012-01-06T20:10:54+00:00

This converts pci_scan_bus_parented() to use pci_create_root_bus() instead of pci_create_bus(). The new bus still has the default (incorrect) resources, so this patch doesn't help fix that problem, but it does remove one more use of pci_create_bus(). Signed-off-by: Bjorn Helgaas Signed-off-by: Jesse Barnes

PCI: convert pci_scan_bus() to use pci_create_root_bus()

2012-01-06T20:10:53+00:00

I plan to deprecate pci_scan_bus_parented(), so use pci_create_root_bus() directly instead. pci_scan_bus() itself will be removed as soon as all callers are gone, so this is just an interim step. v2: export pci_scan_bus Signed-off-by: Bjorn Helgaas Signed-off-by: Jesse Barnes

PCI: add pci_scan_root_bus() that accepts resource list

2012-01-06T20:10:52+00:00

"Early" and "header" quirks often use incorrect bus resources because they see the default resources assigned by pci_create_bus(), before the architecture fixes them up (typically in pcibios_fixup_bus()). Regions reserved by these quirks end up with the wrong parents. Here's the standard path for scanning a PCI root bus: pci_scan_bus or pci_scan_bus_parented pci_create_bus <-- A create with default resources pci_scan_child_bus pci_scan_slot pci_scan_single_device pci_scan_device pci_setup_device pci_fixup_device(early) <-- B pci_device_add pci_fixup_device(header) <-- C pcibios_fixup_bus <-- D fill in correct resources Early and header quirks at B and C use the default (incorrect) root bus resources rather than those filled in at D. This patch adds a new pci_scan_root_bus() function that sets the bus resources correctly from a supplied list of resources. I intend to remove pci_scan_bus() and pci_scan_bus_parented() after fixing all callers. Signed-off-by: Bjorn Helgaas Signed-off-by: Jesse Barnes

PCI: add pci_create_root_bus() that accepts resource list

2012-01-06T20:10:51+00:00

pci_create_bus() assigns ioport_resource and iomem_resource as the default bus resources, i.e., the entire address space. Architectures fix these later, typically in pcibios_fixup_bus() or after pci_scan_bus_parented() returns, but code that runs in the interim sees incorrect resource information. This patch adds a new pci_create_root_bus() that sets the bus resources correctly from a supplied list of resources. I intend to remove pci_create_bus() after changing all callers. Based on original patch by Deng-Cheng Zhu. Reference: http://www.spinics.net/lists/mips/msg41654.html Reference: https://lkml.org/lkml/2011/8/26/88 Signed-off-by: Deng-Cheng Zhu Signed-off-by: Bjorn Helgaas Signed-off-by: Jesse Barnes

PCI: show host bridges and root bus resources

2012-01-06T20:10:51+00:00

Show the bus number and resources for every root bus we create. This will become more interesting when we supply the correct resources instead of using the defaults (ioport_resource and iomem_resource). Signed-off-by: Bjorn Helgaas Signed-off-by: Jesse Barnes

PCI: fix a brace coding style issue in probe.c

2012-01-06T20:10:31+00:00

Fixed a brace coding style issue. Signed-off-by: Zac Storer Signed-off-by: Jesse Barnes

PCI: Clean-up MPS debug output

2011-10-27T19:45:44+00:00

Clean-up MPS debug output to make it a single line and aligned, thus making it more readable for a large number of buses and devices in a single system. Suggested by Benjamin Herrenschmidt Signed-off-by: Jon Mason Signed-off-by: Jesse Barnes