Changes the pci_{enable,disable}_device() functions to work in a
nested basis, so that eg, three calls to enable_device() require three
calls to disable_device().
The reason for this is to simplify PCI drivers for
multi-interface/capability devices. These are devices that cram more
than one interface in a single function. A relevant example of that is
the Wireless [USB] Host Controller Interface (similar to EHCI) [see
http://www.intel.com/technology/comms/wusb/whci.htm].
In these kind of devices, multiple interfaces are accessed through a
single bar and IRQ line. For that, the drivers map only the smallest
area of the bar to access their register banks and use shared IRQ
handlers.
However, because the order at which those drivers load cannot be known
ahead of time, the sequence in which the calls to pci_enable_device()
and pci_disable_device() cannot be predicted. Thus:
1. driverA starts pci_enable_device()
2. driverB starts pci_enable_device()
3. driverA shutdown pci_disable_device()
4. driverB shutdown pci_disable_device()
between steps 3 and 4, driver B would loose access to it's device,
even if it didn't intend to.
By using this modification, the device won't be disabled until all the
callers to enable() have called disable().
This is implemented by replacing 'struct pci_dev->is_enabled' from a
bitfield to an atomic use count. Each caller to enable increments it,
each caller to disable decrements it. When the count increments from 0
to 1, __pci_enable_device() is called to actually enable the
device. When it drops to zero, pci_disable_device() actually does the
disabling.
We keep the backend __pci_enable_device() for pci_default_resume() to
use and also change the sysfs method implementation, so that userspace
enabling/disabling the device doesn't disable it one time too much.
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
ioremap must be balanced by an iounmap and failing to do so can result
in a memory leak.
Tested (compilation only):
- using allmodconfig
- making sure the files are compiling without any warning/error due to
new changes
Signed-off-by: Amol Lad <amol@verismonetworks.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Mostly CodingStyle cleanups for arch/i386/pci/i386.c:
- fit in 80 columns;
- use a #defined value instead of an inline constant;
Also change one resource_size_t (DBG) printk from %08lx to %lx since
it can be more than 32 bits (more than 8 hexits).
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
The existing implementation of pci_block_user_cfg_access() was recently
criticised for providing out of date information and for returning errors
on write, which applications won't be expecting.
This reimplementation uses a global wait queue and a bit per device.
I've open-coded prepare_to_wait() / finish_wait() as I could optimise
it significantly by knowing that the pci_lock protected us at all points.
It looked a bit funny to be doing a spin_unlock_irqsave(); schedule(),
so I used spin_lock_irq() for the _user versions of pci_read_config and
pci_write_config. Not carrying a flags pointer around made the code
much less nasty.
Attempts to block an already blocked device hit a BUG() and attempts to
unblock an already unblocked device hit a WARN(). If we need to block
access to a device from userspace, it's because it's unsafe for even
another bit of the kernel to access the device. An attempt to block
a device for a second time means we're about to access the device to
perform some other operation, which could provoke undefined behaviour
from the device.
Signed-off-by: Matthew Wilcox <matthew@wil.cx>
Acked-by: Adam Belay <abelay@novell.com>
Acked-by: Alan Cox <alan@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
__pci_register_driver() error path forgot to unwind.
driver_unregister() needs to be called when pci_create_newid_file() failed.
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
So it looks like pci aer code will call pci_osc_support_set to tell the
firmware about OSC_EXT_PCI_CONFIG_SUPPORT flag. that causes
ctrlset_buf[OSC_SUPPORT_TYPE] to evaluate to true when pciehp calls
pci_osc_control_set() is called (to attempt to use OSC to gain native
pcie control from firmware), regardless of whether or not _OSC was
actually successfully executed. That causes this section of code:
if (ctrlset_buf[OSC_SUPPORT_TYPE] &&
((global_ctrlsets & ctrlset) != ctrlset)) {
return AE_SUPPORT;
}
to be hit.
This patch will reset the OSC_SUPPORT_TYPE field if _OSC fails, and then
would allow pciehp to go ahead and try to run _OSC again.
Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
acpiphp_glue_exit() needs to be called to unwind when no slots found.
(It fixes data corruption when reloading acpiphp driver with no such devices)
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This patch fixes invalid usage of list_for_each()
list_for_each (node, &bridge_list) {
bridge = (struct acpiphp_bridge *)node;
...
}
This code works while the member of list node is located at the
head of struct acpiphp_bridge.
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Support a shadowed ROM when running with an ACPI capable PROM.
Define a new dev.resource flag IORESOURCE_ROM_BIOS_COPY to
describe the case of a BIOS shadowed ROM, which can then
be used to avoid pci_map_rom() making an unneeded call to
pci_enable_rom().
Signed-off-by: John Keller <jpk@sgi.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
A few minor changes to the way slot/device fixup is done.
No need to be calling sn_pci_controller_fixup(), as
a root bus cannot be hotplugged.
Signed-off-by: John Keller <jpk@sgi.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
First phase in introducing ACPI support to SN.
In this phase, when running with an ACPI capable PROM,
the DSDT will define the root busses and all SN nodes
(SGIHUB, SGITIO). An ACPI bus driver will be registered
for the node devices, with the acpi_pci_root_driver being
used for the root busses. An ACPI vendor descriptor is
now used to pass platform specific information for both
nodes and busses, eliminating the need for the current
SAL calls. Also, with ACPI support, SN fixup code is no longer
needed to initiate the PCI bus scans, as the acpi_pci_root_driver
does that.
However, to maintain backward compatibility with non-ACPI capable
PROMs, none of the current 'fixup' code can been deleted, though
much restructuring has been done. For example, the bulk of the code
in io_common.c is relocated code that is now common regardless
of what PROM is running, while io_acpi_init.c and io_init.c contain
routines specific to an ACPI or non ACPI capable PROM respectively.
A new pci bus fixup platform vector has been created to provide
a hook for invoking platform specific bus fixup from pcibios_fixup_bus().
The size of io_space[] has been increased to support systems with
large IO configurations.
Signed-off-by: John Keller <jpk@sgi.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This file no longer uses pci_cache_line_size, so delete the declaration
Signed-off-by: Matthew Wilcox <matthew@wil.cx>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
pSeries is the only architecture left using HAVE_ARCH_PCI_MWI and it's
really inappropriate for its needs. It really wants to disable MWI
altogether. So here are a pair of stub implementations for pci_set_mwi
and pci_clear_mwi.
Also rename pci_generic_prep_mwi to pci_set_cacheline_size since that
better reflects what it does.
Signed-off-by: Matthew Wilcox <matthew@wil.cx>
Cc: Paul Mackerras <paulus@samba.org>
Acked-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
The setting of the CACHE_LINE_SIZE register in sparc64's pci
initialisation code isn't quite adequate as the device may have
incompatible requirements. The generic code tests for this, so switch
sparc64 over to using it.
Since sparc64 has different L1 cache line size and PCI cache line size,
it would need to override the generic code like i386 and ia64 do. We
know what the cache line size is at compile time though, so introduce a
new optional constant PCI_CACHE_LINE_BYTES.
Signed-off-by: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: David Miller <davem@davemloft.net>
Acked-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
The pci_generic_prep_mwi() code does everything that pcibios_prep_mwi()
does on ia64. All we need to do is be sure that pci_cache_line_size
is set appropriately, and we can delete pcibios_prep_mwi().
Using SMP_CACHE_BYTES as the default was wrong on uniprocessor machines
as it is only 8 bytes. The default in the generic code of L1_CACHE_BYTES
is at least as good.
Signed-off-by: Matthew Wilcox <matthew@wil.cx>
Acked-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
The number of permutations of crap we do is amazing and almost all of it
has the wrong effect in 2.6.
At the heart of this is the PCI SFF magic which says that compatibility
mode PCI IDE controllers use ISA IRQ routing and hard coded addresses
not the BAR values. The old quirks variously clears them, sets them,
adjusts them and then IDE ignores the result.
In order to drive all this garbage out and to do it portably we need to
handle the SFF rules directly and properly. Because we know the device
BAR 0-3 are not used in compatibility mode we load them with the values
that are implied (and indeed which many controllers actually
thoughtfully put there in this mode anyway).
This removes special cases in the IDE layer and libata which now knows
that bar 0/1/2/3 always contain the correct address. It means our
resource allocation map is accurate from boot, not "mostly accurate"
after ide is loaded, and it shoots lots of code. There is also lots more
code and magic constant knowledge to shoot once this is in and settled.
Been in my test tree for a while both with drivers/ide and with libata.
Wants some -mm shakedown in case I've missed something dumb or there are
corner cases lurking.
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Shouldn't PCI-X state be saved/restored? No device really needs this
right now. qla24xx (fc HBA) and mthca (infiniband) don't do suspend,
and sky2 resets its tweaks when links are brought up.
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Move some MSI-X #defines into pci_regs.h so they can be used
outside of drivers/pci.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
It's not really broken, but people keep running into other problems
caused by it. Re-enable it so that the drivers get stress tested.
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This changes the type of variable "i" in rtl8169_init_one()
from "unsigned int" to "int". "i" is checked for < 0 later,
which can never happen for "unsigned". This results in broken
error handling.
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Move declaration of struct pxa2xx_udc_mach_info from
include/asm-arm/arch-pxa/udc.h to new file
include/asm-arm/mach/udc_pxa2xx.h.
This allow us to use this structure with
multiple platforms - pxa and ixp4xx. USB
device controller used in pxa25x is the same
as controller used in ixp4xx.
Signed-off-by: Milan Svoboda <msvoboda@ra.rockwell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
MAX_HEADER is either set to LL_MAX_HEADER or LL_MAX_HEADER + 48, and
this is controlled by a set of CONFIG_* ifdef tests.
It is trying to use LL_MAX_HEADER + 48 when any of the tunnels are
enabled which set hard_header_len like this:
dev->hard_header_len = LL_MAX_HEADER + sizeof(struct xxx);
The correct set of tunnel drivers which do this are:
ipip
ip_gre
ip6_tunnel
sit
so make the ifdef test match.
Noticed by Patrick McHardy and with help from Herbert Xu.
Signed-off-by: David S. Miller <davem@davemloft.net>
On devices with hard_header_len > LL_MAX_HEADER ip_route_me_harder()
reallocates the skb, leading to memory corruption when using the stale
tcph pointer to update the checksum.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
All users of __{ip,nf}_conntrack_expect_find() don't expect that
it increments the reference count of expectation.
Signed-off-by: Yasuyuki Kozakai <yasuyuki.kozakai@toshiba.co.jp>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
When NFA_NEST exceeds the skb size the protocol reference is leaked.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
The found helper cannot be assigned to conntrack after unlocking
nf_conntrack_lock. This tries to find helper to assign again.
Signed-off-by: Yasuyuki Kozakai <yasuyuki.kozakai@toshiba.co.jp>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This fixes the bug which doesn't assign helper to newly created
conntrack via nf_conntrack_netlink.
Signed-off-by: Yasuyuki Kozakai <yasuyuki.kozakai@toshiba.co.jp>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
* 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev:
[PATCH] libata: Fixup ata_sas_queuecmd to handle __ata_scsi_queuecmd failure
[PATCH] ahci: AHCI mode SATA patch for Intel ICH9
[PATCH] libata: don't schedule EH on wcache on/off if old EH
* 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6:
[PATCH] x86-64: Use stricter in process stack check for unwinder
[PATCH] i386: Fix compilation with UP genericarch
[PATCH] x86-64: Fix warning in io_apic.c
[PATCH] x86-64: work around gcc4 issue with -Os in Dwarf2 stack unwind
[PATCH] x86_64: Align data segment to PAGE_SIZE boundary
* 'linus' of master.kernel.org:/pub/scm/linux/kernel/git/perex/alsa:
[ALSA] version 1.0.13
[ALSA] snd-emu10k1: Fix capture for one variant.
[ALSA] Fix hang-up at disconnection of usb-audio
[ALSA] hda: fix typo for xw4400 PCI sub-ID
[ALSA] hda: fix sigmatel dell system detection
[ALSA] Enable stereo line input for TAS codec
[ALSA] rtctimer: handle RTC interrupts with a tasklet
include/scsi/libsas.h:479: error: field 'smp_req' has incomplete type
include/scsi/libsas.h:480: error: field 'smp_resp' has incomplete type
Signed-off-by: Dave Jones <davej@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
The return value of crypto_alloc_blkcipher() should be checked by IS_ERR().
Cc: Mike Halcrow <mhalcrow@us.ibm.com>
Cc: Phillip Hellewell <phillip@hellewell.homeip.net>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
The return value of create_write_pipe()/create_read_pipe() should be
checked by IS_ERR().
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
When we sleep and wait for a suspended operation to be resumed, go
back and check until it's ready -- don't just continue after the first
time we're woken. This can cause file system corruption.
Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Previously it would check for alignment only, which could break
if the stack pointer was unaligned. Now explicitely check if the
stack pointer is in the stack page of the current process.
Ported from i386.
Signed-off-by: Andi Kleen <ak@suse.de>
Fix
arch/i386/mach-generic/built-in.o: In function `apicid_to_node':
summit.c:(.text+0x2f): undefined reference to `apicid_2_node'
with CONFIG_GENERICH_ARCH and !CONFIG_SMP
Signed-off-by: Andi Kleen <ak@suse.de>
This fixes a problem with gcc4 mis-compiling the stack unwind code under
-Os, which resulted in 'stuck' messages whenever an assembly routine was
encountered.
(The second hunk is trivial cleanup.)
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Commit 2c8c0e6b8d ("[PATCH] Convert x86-64
to early param") broke the earlyprintk=...,keep feature.
This restores that functionality. Tested on x86_64. Must-have for
v2.6.19, no risk.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
