Commit Graph

41 Commits

Author SHA1 Message Date
Bjorn Helgaas 2c1f56acb2 Merge branch 'pci/feng-avoid-kmalloc' into next
* pci/feng-avoid-kmalloc:
  PCI: Remove the obsolete no_pci_devices() check
  PCI: Use pci_device_id on stack for pci_get_subsys/class() to avoid kmalloc
2012-09-10 16:31:08 -06:00
Feng Tang e9bf1040f6 PCI: Remove the obsolete no_pci_devices() check
In function pci_get_subsys() there is a check:

	/*
	 * pci_find_subsys() can be called on the ide_setup() path,
	 * super-early in boot.  But the down_read() will enable local
	 * interrupts, which can cause some machines to crash.  So here we
	 * detect and flag that situation and bail out early.
	 */
	if (unlikely(no_pci_devices()))
		return NULL;

But there is no ide_setup() now, and no down_read() either, which
makes the check obsolete. So remove it.

Signed-off-by: Feng Tang <feng.tang@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-09-10 16:23:29 -06:00
Feng Tang b9443f401b PCI: Use pci_device_id on stack for pci_get_subsys/class() to avoid kmalloc
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>
2012-08-24 12:33:13 -06:00
Bjorn Helgaas 7bf79d8a99 Merge branch 'pci/bjorn-cleanup-remove' into next
* 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
2012-08-23 18:36:10 -06:00
Yijing Wang 62f87c0e31 PCI: Introduce pci_pcie_type(dev) to replace pci_dev->pcie_type
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>
2012-08-23 09:40:57 -06:00
Bjorn Helgaas 66455f5472 PCI: Use list_for_each_entry() for bus->devices traversal
Replace list_for_each() + pci_dev_b() with the simpler
list_for_each_entry().

Tested-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Yinghai Lu <yinghai@kernel.org>
2012-08-22 11:31:37 -06:00
Amos Kong ce29ca3ea4 PCI: acpiphp: remove all functions in slot, even without ACPI _EJx
When we add a device with acpiphp, we enumerate all functions in the
slot with pci_scan_slot(), regardless of whether they have associated
ACPI methods such as _EJ0.

When removing the device, we previously removed only the functions
with those ACPI methods.  This patch makes the remove symmetric with the
add: we remove all functions in the slot, whether they have associated
ACPI methods or not.

With qemu-kvm and SeaBIOS, we can build a multi-function device where
only function 0 has _EJ0 and _ADR (see bugzilla below).  Removing and
re-adding that slot (including all functions of the device) works correctly
with Windows guests.  This patch makes it also work in Linux guests.

[bhelgaas: restructure loop iteration, pull out of slot->funcs loop]
Reference: https://bugzilla.kernel.org/show_bug.cgi?id=43219
Signed-off-by: Amos Kong <kongjianjun@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2012-06-13 16:38:10 -06:00
Kulikov Vasiliy 4e344b1cc5 PCI: use for_each_pci_dev()
Use for_each_pci_dev() to simplify the code.

Signed-off-by: Kulikov Vasiliy <segooon@gmail.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2010-07-30 09:47:22 -07:00
Tejun Heo 5a0e3ad6af include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-30 22:02:32 +09:00
Stefan Assmann 45e829ea41 PCI: change PCI nomenclature in drivers/pci/ (comment changes)
Changing occurrences of variants of PCI-X and PCIe to the PCI-SIG
terms listed in the "Trademark and Logo Usage Guidelines".
http://www.pcisig.com/developers/procedures/logos/Trademark_and_Logo_Usage_Guidelines_updated_112206.pdf

Patch is limited to drivers/pci/ and changes concern comments only.

Signed-off-by: Stefan Assmann <sassmann@redhat.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-12-16 13:37:53 -08:00
Kenji Kaneshige 5f4d91a122 PCI: use pci_is_pcie() in pci core
Change for PCI core to use pci_is_pcie() instead of checking
pci_dev->is_pcie.

Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-11-24 15:25:16 -08:00
Andrew Patterson 3c299dc226 PCI: add pci_get_domain_bus_and_slot function
Added the pci_get_domain_and_slot_function which is analogous to
pci_get_bus_and_slot. It returns a pci_dev given a domain (segment) number,
bus number, and devnr. Like pci_get_bus_and_slot,
pci_get_domain_bus_and_slot holds a reference to the returned pci_dev.

Converted pci_get_bus_and_slot to a wrapper that calls
pci_get_domain_bus_and_slot with the domain hard-coded to 0.

This routine was patterned off code suggested by Bjorn Helgaas.

Acked-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Andrew Patterson <andrew.patterson@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-11-04 13:06:36 -08:00
Andi Kleen e8b553bf4b PCI: disable pci_find_device warnings when deprecated pci functions are enabled
Shut off the long standing

linux/drivers/pci/search.c:144: warning: 'pci_find_device' is deprecated (declared at linux/drivers/pci/search.c:136)
linux/drivers/pci/search.c:144: warning: 'pci_find_device' is deprecated (declared at linux/drivers/pci/search.c:136)

warnings that appear on every build when CONFIG_PCI_LEGACY is enabled.

gcc warns for the use in EXPORT_SYMBOL

I moved these to a separate file and disabled the warning in the Makefile for that file.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-09-09 13:29:25 -07:00
Kenji Kaneshige 6e3f36df0f PCI: use pci_is_root_bus() in pci_find_upstream_pcie_bridge()
Use pci_is_root_bus() in pci_find_upstream_pcie_bridge() to check if
the pci bus is root, for code consistency.

Reviewed-by: Alex Chiang <achiang@hp.com>
Reviewed-by: Grant Grundler <grundler@parisc-linux.org>
Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-06-16 14:29:30 -07:00
Alex Chiang 3b073eda95 PCI: remove deprecated pci_find_slot() interface
The last in-tree caller of pci_find_slot has been converted, so
let's get rid of this deprecated interface.

Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-06-11 12:04:16 -07:00
Kenji Kaneshige 151ab36a2e PCI: fix wrong assumption in pci_find_upstream_pcie_bridge
Current pci_find_upstream_pcie_bridge() has a wrong assumption that
pci_bus->self is NULL on the root pci bus. But it might not true on
some platforms. Because of this wrong assumption, current
pci_find_upstream_pcie_bridge() might cause endless loop. We must
check pci_bus->parent instead.

Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-03-20 10:48:03 -07:00
Matthew Wilcox c4ed02fae7 PCI: Fix reference counting bug
pci_get_subsys() will decrement the reference count of the device that
it starts searching from.  Unfortunately, the pci_find_device() interface
will already have decremented the reference count of the device earlier,
so the device will end up losing all reference counts and be freed.

We can fix this by incrementing the reference count of the device to
start searching from before calling pci_get_subsys().

Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2008-10-22 16:42:35 -07:00
Greg KH b08508c40a PCI: fix compiler warnings in pci_get_subsys()
pci_get_subsys() changed in 2.6.26 so that the from pointer is modified
when the call is being invoked, so fix up the 'const' marking of it that
the compiler is complaining about.

Reported-by: Rufus & Azrael <rufus-azrael@numericable.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2008-09-16 15:52:08 -07:00
Greg KH ebca4f1bce PCI: fix reference leak in pci_get_dev_by_id()
Alex Chiang and Matthew Wilcox pointed out that pci_get_dev_by_id() does
not properly decrement the reference on the from pointer if it is
present, like the documentation for the function states it will.

It fixes a pretty bad leak in the hotplug core (we were leaking an
entire struct pci_dev for each function of each offlined card, the first
time around; subsequent onlines/offlines were ok).

Cc: Matthew Wilcox <matthew@wil.cx>
Cc: stable <stable@kernel.org>
Tested-by: Alex Chiang <achiang@hp.com>
Acked-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2008-08-21 15:22:46 -07:00
Greg Kroah-Hartman 95247b57ed PCI: clean up search.c a lot
This cleans up the search.c file, now using the pci list of devices that
are created for the driver core, instead of relying on our separate list
of devices.  It's better to use the functions already created for this
kind of thing, instead of rolling our own all the time.

This work is done in anticipation of getting rid of that second list of
pci devices all together.

And it ends up saving code, always a nice benefit.

This also removes one compiler warning for when CONFIG_PCI_LEGACY is
enabled as we no longer internally use the deprecated functions anymore.

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-04-20 21:46:54 -07:00
Greg Kroah-Hartman 34220909a2 PCI: remove pci_get_device_reverse
This removes the pci_get_device_reverse function as there should not be
any need to walk pci devices backwards anymore.  All users of this call
are now gone from the tree, so it is safe to remove it.

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-04-20 21:46:53 -07:00
Greg Kroah-Hartman 448432c4b8 PCI: remove pci_find_present
No one is using this function anymore for quite some time, so remove it.
Everyone calls pci_dev_present() instead anyway...

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-04-20 21:46:52 -07:00
Jeff Garzik bd3989e006 PCI: Add Kconfig option to disable deprecated pci_find_* API
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-11-05 13:35:17 -08:00
Keshavamurthy, Anil S 994a65e25d Intel IOMMU: PCI generic helper function
When devices are under a p2p bridge, upstream transactions get replaced by the
device id of the bridge as it owns the PCIE transaction.  Hence its necessary
to setup translations on behalf of the bridge as well.  Due to this limitation
all devices under a p2p share the same domain in a DMAR.

We just cache the type of device, if its a native PCIe device
or not for later use.

[akpm@linux-foundation.org: BUG_ON -> WARN_ON+recover]
Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
Cc: Andi Kleen <ak@suse.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Muli Ben-Yehuda <muli@il.ibm.com>
Cc: "Siddha, Suresh B" <suresh.b.siddha@intel.com>
Cc: Arjan van de Ven <arjan@infradead.org>
Cc: Ashok Raj <ashok.raj@intel.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Christoph Lameter <clameter@sgi.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-22 08:13:18 -07:00
Andrew Morton 35ef63f635 use no_pci_devices() in pci/search.c
We have an API function for this now.

Cc: Zhang Yanmin <yanmin.zhang@intel.com>
Cc: Greg KH <greg@kroah.com>
Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-16 09:05:41 -07:00
Randy Dunlap 5463d9f0f3 PCI: limit pci_get_bus_and_slot to domain 0
Limit pci_get_bus_and_slot() to domain (segment) 0 since domain is not
specified in the function call and defaulting to domain 0 is the only
reasonable thing to do (rather than returning a device from some other
unknown domain).

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-07-11 16:02:13 -07:00
Ben Gardner 3c92c57af9 PCI: Fix pci_find_present
pci_find_present() is only matching the last item in the list of ids.

The break after the match is found only escapes the for loop, not the
while loop, so found gets reset to NULL on the next pass.

Signed-off-by: Ben Gardner <gardner.ben@gmail.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-05-31 16:56:37 -07:00
Sam Ravnborg 96bde06a2d pci: do not mark exported functions as __devinit
Functions marked __devinit will be removed after kernel init.  But being
exported they are potentially called by a module much later.

So the safer choice seems to be to keep the function even in the non
CONFIG_HOTPLUG case.

This silence the follwoing section mismatch warnings:
WARNING: drivers/built-in.o - Section mismatch: reference to .init.text:pci_bus_add_device from __ksymtab_gpl between '__ksymtab_pci_bus_add_device' (at offset 0x20) and '__ksymtab_pci_walk_bus'
WARNING: drivers/built-in.o - Section mismatch: reference to .init.text:pci_create_bus from __ksymtab_gpl between '__ksymtab_pci_create_bus' (at offset 0x40) and '__ksymtab_pci_stop_bus_device'
WARNING: drivers/built-in.o - Section mismatch: reference to .init.text:pci_bus_max_busnr from __ksymtab_gpl between '__ksymtab_pci_bus_max_busnr' (at offset 0xc0) and '__ksymtab_pci_assign_resource_fixed'
WARNING: drivers/built-in.o - Section mismatch: reference to .init.text:pci_claim_resource from __ksymtab_gpl between '__ksymtab_pci_claim_resource' (at offset 0xe0) and '__ksymtab_pcie_port_bus_type'
WARNING: drivers/built-in.o - Section mismatch: reference to .init.text:pci_bus_add_devices from __ksymtab between '__ksymtab_pci_bus_add_devices' (at offset 0x70) and '__ksymtab_pci_bus_alloc_resource'
WARNING: drivers/built-in.o - Section mismatch: reference to .init.text:pci_scan_bus_parented from __ksymtab between '__ksymtab_pci_scan_bus_parented' (at offset 0x90) and '__ksymtab_pci_root_buses'
WARNING: drivers/built-in.o - Section mismatch: reference to .init.text:pci_bus_assign_resources from __ksymtab between '__ksymtab_pci_bus_assign_resources' (at offset 0x4d0) and '__ksymtab_pci_bus_size_bridges'
WARNING: drivers/built-in.o - Section mismatch: reference to .init.text:pci_bus_size_bridges from __ksymtab between '__ksymtab_pci_bus_size_bridges' (at offset 0x4e0) and '__ksymtab_pci_setup_cardbus'

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-05-02 19:02:35 -07:00
Sam Ravnborg 128bf5cb54 pci: fix section mismatch warning
drivers/pci/search.c caused following section mismatch warning
(if compiled with CONFIG_HOTPLUG=n):

WARNING: drivers/pci/built-in.o - Section mismatch: reference to .init.text: from .text.pci_find_bus after 'pci_find_bus' (at offset 0x24)

This was due to pci_find_bus() calling a function marked __devinit.
Fix was to remove the __devinit from the offending function.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-03-09 15:36:30 -08:00
Adrian Bunk fd9b37cc4e PCI: remove pci_find_device_reverse()
This patch removes the no longer used pci_find_device_reverse().

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Acked-by: Alan Cox <alan@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-02-07 15:50:04 -08:00
Andrew Morton 6a4c24ec52 [PATCH] pci: remove warning messages
Remove these recently-added warnings.  They don't tell us anythng very
interesting and Kumar says "On an embedded PPC reference system I see this
message 6 times when I've got no cards in the PCI slots."

Acked-by: Kumar Gala <galak@kernel.crashing.org>
Acked-by: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-01 16:22:41 -08:00
Ard van Breemen 6ae4adf503 [PATCH] PCI: prevent down_read when pci_devices is empty
The pci_find_subsys gets called very early by obsolete ide setup parameters.
This is a bogus call since pci is not initialized yet, so the list is empty.
But in the mean time, interrupts get enabled by down_read.  This can result in
a kernel panic when the irq controller gets initialized.

This patch checks if the device list is empty before taking the semaphore, and
hence will not enable irq's.  Furthermore it will inform that it is called
while pci_devices is empty as a reminder that the ide code needs to be fixed.

The pci_get_subsys can get called in the same manner, and as such is patched
in the same manner.

[akpm@osdl.org: cleanups]
Signed-off-by: Ard van Breemen <ard@telegraafnet.nl>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2007-01-05 23:55:21 -08:00
Alan Cox 1597cacbe3 PCI: Fix multiple problems with VIA hardware
This patch is designed to fix:
- Disk eating corruptor on KT7 after resume from RAM
- VIA IRQ handling
- VIA fixups for bus lockups after resume from RAM

The core of this is to add a table of resume fixups run at resume time.
We need to do this for a variety of boards and features, but particularly
we need to do this to get various critical VIA fixups done on resume.

The second part of the problem is to handle VIA IRQ number rules which
are a bit odd and need special handling for PIC interrupts. Various
patches broke various boxes and while this one may not be perfect
(hopefully it is) it ensures the workaround is applied to the right
devices only.

From: Jean Delvare <khali@linux-fr.org>

Now that PCI quirks are replayed on software resume, we can safely
re-enable the Asus SMBus unhiding quirk even when software suspend support
is enabled.

[akpm@osdl.org: fix const warning]
Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-20 10:54:43 -08:00
Alan Cox d86f90f991 pci: Introduce pci_find_present
This works like pci_dev_present but instead of returning boolean returns
the matching pci_device_id entry.  This makes it much more useful.  Code
bloat is basically nil as the old boolean function is rewritten in terms of
the new one.

This will be used by the updated VIA PCI quirks for one

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-20 10:54:42 -08:00
Alan Cox 29f3eb6463 pci: Additional search functions
In order to finish converting to pci_get_* interfaces we need to add a couple
of bits of missing functionaility

pci_get_bus_and_slot() provides the equivalent to pci_find_slot()
(pci_get_slot is already taken as a name for something similar but not the
same)

pci_get_device_reverse() is the equivalent of pci_find_device_reverse but
refcounting

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-10-18 11:36:12 -07:00
Randy Dunlap c8439cfccc PCI: pci/search: EXPORTs cannot be __devinit
EXPORTed symbols cannot be __init/__devinit.

Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-08-03 13:20:06 -07:00
Randy Dunlap d75763d240 [PATCH] pci/search: cleanups, add to kernel-api.tmpl
Clean up kernel-doc comments in drivers/pci/search.c (line sizes and typos).

Enable that source file in DocBook/kernel-api.tmpl.

Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-07-31 13:28:40 -07:00
Zhang Yanmin d71374dafb [PATCH] PCI: fix race with pci_walk_bus and pci_destroy_dev
pci_walk_bus has a race with pci_destroy_dev. When cb is called
in pci_walk_bus, pci_destroy_dev might unlink the dev pointed by next.
Later on in the next loop, pointer next becomes NULL and cause
kernel panic.

Below patch against 2.6.17-rc4 fixes it by changing pci_bus_lock (spin_lock)
to pci_bus_sem (rw_semaphore).

Signed-off-by: Zhang Yanmin <yanmin.zhang@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-06-21 12:00:01 -07:00
Alan Stern b89b7ea05a [PATCH] PCI: Move pci_dev_put outside a spinlock
This patch (as659) fixes a might_sleep problem in the PCI core, by moving
a call to pci_dev_put() outside the scope of a spinlock.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-03-23 14:35:14 -08:00
Prarit Bhargava e07d01e0ae [IA64] hotplug/ia64: SN Hotplug Driver - pci_find_next_bus export
The pci_find_next_bus function is listed as being exported to drivers.  It is
not EXPORT_SYMBOL'd.

Signed-off-by: Prarit Bhargava <prarit@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2005-07-06 15:28:40 -07:00
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00