The fakephp driver was scheduled for removal in 2011.
Fakephp presented /sys/bus/pci/slots/.../power files for every PCI
function. Writing "0" to one of these files logically removed the device
from the system. The PCI core now provides the same functionality with
/sys/bus/pci/devices/.../remove.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This fixes a kernel warning https://lkml.org/lkml/2012/7/31/682
pci_get_subsys() may get called in late system reboot stage, using
a sleepable kmalloc() sounds fragile and will cause a kernel warning
with my recent commmit 55c844a "x86/reboot: Fix a warning message
triggered by stop_other_cpus()" which disable local interrupt in
late system shutdown/reboot phase. Using a local parameter instead
will fix it and make it eligible for calling from atomic context.
Do the same change for the pci_get_class() as suggested by Bjorn Helgaas.
Initializing the on-stack struct pci_device_id suggested by Fengguang Wu
and Jiri Slaby. Section 6.7.8 of the C99 standard guarantees that when we
initialize some of the struct members, the rest of the struct is implicitly
initialized the same as objects with static storage duration, i.e., to zero
in this case.
[bhelgaas: changelog, incorporate Fengguang/Jiri initialization fix]
Bisected-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Feng Tang <feng.tang@intel.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Fengguang Wu <fengguang.wu@intel.com>
* pci/bjorn-cleanup-remove:
PCI: Remove unused pci_dev_b()
sgi-agp: Use list_for_each_entry() for bus->devices traversal
parisc/PCI: Use list_for_each_entry() for bus->devices traversal
parisc/PCI: Enable PERR/SERR on all devices
frv/PCI: Use list_for_each_entry() for bus->devices traversal
PCI: Leave normal LIST_POISON in deleted list entries
PCI: Rename local variables to conventional names
PCI: Remove unused, commented-out, code
PCI: Stop and remove devices in one pass
PCI: Fold stop and remove helpers into their callers
PCI: Use list_for_each_entry() for bus->devices traversal
PCI: Remove pci_stop_and_remove_behind_bridge()
PCI: Don't export stop_bus_device and remove_bus_device interfaces
pcmcia: Use common pci_stop_and_remove_bus_device()
PCI: acpiphp: Use common pci_stop_and_remove_bus_device()
PCI: acpiphp: Stop disabling bridges on remove
If we try to print to the console device while its decoding is disabled,
the system will hang.
Reported-and-tested-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Olof Johansson <olof@lixom.net>
Before initiating an FLR, we should wait for completion of any outstanding
non-posted requests. See PCIe spec r3.0, sec 6.6.2.
This makes reset_intel_82599_sfp_virtfn() very similar to the generic
pcie_flr(). The only difference is that the 82599 doesn't report FLR
support in the VF Device Capability register.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
The PCI Express Capability (PCIe spec r3.0, sec 7.8) comes in two
versions, v1 and v2. In v1 Capability structures (PCIe spec r1.0 and
r1.1), some fields are optional, so the structure size depends on the
device type.
This patch adds functions to access this capability so drivers don't
have to be aware of the differences between v1 and v2. Note that these
new functions apply only to the "PCI Express Capability," not to any of
the other "PCI Express Extended Capabilities" (AER, VC, ACS, MFVC, etc.)
Function pcie_capability_read_word/dword() reads the PCIe Capabilities
register and returns the value in the reference parameter "val". If
the PCIe Capabilities register is not implemented on the PCIe device,
"val" is set to 0.
Function pcie_capability_write_word/dword() writes the value to the
specified PCIe Capability register.
Function pcie_capability_clear_and_set_word/dword() sets and/or clears bits
of a PCIe Capability register.
[bhelgaas: changelog, drop "pci_" prefixes, don't export
pcie_capability_reg_implemented()]
Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
With introduction of pci_pcie_type(), pci_dev->pcie_type field becomes
redundant, so remove it.
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Introduce an inline function pci_pcie_type(dev) to extract PCIe
device type from pci_dev->pcie_flags_reg field, and prepare for
removing pci_dev->pcie_type.
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Some extended capabilities, e.g., the vendor-specific capability, can
occur several times. The existing pci_find_ext_capability() only finds
the first occurrence. This adds pci_find_next_ext_capability(), which
can iterate through all of them.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Fix kernel-doc warnings in drivers/pci/pci.c:
Warning(drivers/pci/pci.c:1550): No description found for parameter 'pci_dev'
Warning(drivers/pci/pci.c:1550): Excess function parameter 'dev' description in 'pci_wakeup'
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
list_del() already sets next/prev to LIST_POISON1/LIST_POISON2, so we
don't need to do anything special here to prevent further list accesses.
Tested-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Yinghai Lu <yinghai@kernel.org>
Previously, when we removed a PCI device, we made two passes over the
hierarchy rooted at the device. In the first pass, we stopped all
the devices, and in the second, we removed them.
This patch combines the two passes into one so that we remove a device as
soon as it and all its children have been stopped.
Note that we previously stopped devices in reverse order and removed them
in forward order. Now we stop and remove them in reverse order.
Tested-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Yinghai Lu <yinghai@kernel.org>
pci_stop_bus_devices() is only two lines of code and is only called by
pci_stop_bus_device(), so I think it's easier to read if we just fold it
into the caller. Similarly for __pci_remove_behind_bridge().
Tested-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Yinghai Lu <yinghai@kernel.org>
The PCMCIA CardBus driver was the only user of
pci_stop_and_remove_behind_bridge(), and it now uses
pci_stop_and_remove_bus_device() instead, so remove this interface.
This removes exported symbol pci_stop_and_remove_behind_bridge.
Tested-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Yinghai Lu <yinghai@kernel.org>
Bjorn Helgaas
Feng Tang
Jiang Liu
Yijing Wang
Randy Dunlap