Wifi rfkill state changes can race with pci hotplug cleanup. A simple
fix is to refresh the hotplug state just before deregistering the pci
hotplug slot.
There is also potential for a hotplug notification to fire too early
during setup, while the structures it uses are still being initialised.
(This could only happen if the BIOS performs hotplug itself; a bug
triggered by removing the battery while hibernated). Avoid this by
registering the notifier later. The same refresh mechanism is used
to handle rfkill state changes which can now race with registration.
Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Len Brown <len.brown@intel.com>
Commit d0265f0 "eeepc-laptop: fix hot-unplug on resume" used a workqueue
to protect pci hotplug against multiple simultaneous calls during
resume. It seems to work, but a mutex would be more appropriate.
This is in preparation to fix the potential pci hotplug race on unload.
Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Len Brown <len.brown@intel.com>
The whole point of registering as a PCI hotplug driver was to prevent
conflict with pciehp. At the moment it happens to work because
eeepc-laptop is loaded first, but it doesn't work the other way round.
If pciehp is loaded first then we fail to claim the slot - we need to
respect this and not handle hotplug events.
Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Len Brown <len.brown@intel.com>
Summary:
Kernel panic arise when stack protection is enabled, since strncat will
add a null terminating byte '\0'; So in functions
like this one (wmi_query_block):
char wc[4]="WC";
....
strncat(method, block->object_id, 2);
...
the length of wc should be n+1 (wc[5]) or stack protection
fault will arise. This is not noticeable when stack protection is
disabled,but , isn't good either.
Config used: [CONFIG_CC_STACKPROTECTOR_ALL=y,
CONFIG_CC_STACKPROTECTOR=y]
Panic Trace
------------
.... stack-protector: kernel stack corrupted in : fa7b182c
2.6.30-rc8-obelisco-generic
call_trace:
[<c04a6c40>] ? panic+0x45/0xd9
[<c012925d>] ? __stack_chk_fail+0x1c/0x40
[<fa7b182c>] ? wmi_query_block+0x15a/0x162 [wmi]
[<fa7b182c>] ? wmi_query_block+0x15a/0x162 [wmi]
[<fa7e7000>] ? acer_wmi_init+0x00/0x61a [acer_wmi]
[<fa7e7135>] ? acer_wmi_init+0x135/0x61a [acer_wmi]
[<c0101159>] ? do_one_initcall+0x50+0x126
Addresses http://bugzilla.kernel.org/show_bug.cgi?id=13514
Signed-off-by: Costantino Leandro <lcostantino@gmail.com>
Signed-off-by: Carlos Corbacho <carlos@strangeworlds.co.uk>
Cc: Len Brown <len.brown@intel.com>
Cc: Bjorn Helgaas <bjorn.helgaas@hp.com>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
OOPS on resume when the wireless adaptor is disabled during suspend was
introduced by "eeepc-laptop: read rfkill soft-blocked state on resume".
Unable to handle kernel NULL pointer dereference
Process s2disk
Tainted: G W
IP: klist_put
Call trace:
? klist_del
? device_del
? device_unregister
? pci_stop_dev
? pci_stop_bus
? pci_remove_device
? eeepc_rfkill_hotplug [eeepc_laptop]
? eeepc_hotk_resume [eeepc_laptop]
? acpi_device_resume
? device_resume
? hibernation_snapshot
It appears the PCI device is removed twice. The eeepc_rfkill_hotplug()
call from the resume handler is racing against the call from the ACPI
notifier callback. The ACPI notification is triggered by the resume
handler when it refreshes the value of CM_ASL_WLAN.
The fix is to serialize hotplug calls using a workqueue.
http://bugzilla.kernel.org/show_bug.cgi?id=13825
Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Acked-by: Corentin Chary <corentin.chary@gmail.com>
Signed-off-by: Len Brown <len.brown@intel.com>
HBRV-based default selection of backlight control strategy didn't work
well, at least the X41 defines it but doesn't use it and I don't think
it will stop there.
Switch to a white/blacklist. All models that have HBRV defined have
been included in the list, and initially all ATI GPUs will get
ECNVRAM, and the Intel GPUs will get UCMS_STEP.
Symptoms of incorrect backlight mode selection are:
1. Non-working backlight control through sysfs;
2. Backlight gets reset to the lowest level at every shutdown, reboot
and when thinkpad-acpi gets unloaded;
This fixes a regression in 2.6.30, bugzilla #13826
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Reported-by: Tobias Diedrich <ranma+kernel@tdiedrich.de>
Cc: stable@kernel.org
Signed-off-by: Len Brown <len.brown@intel.com>
The standard ACPI dock driver can handle the hotplug bays and docks of
the ThinkPads just fine (including batteries) as of 2.6.27, and the
code in thinkpad-acpi for the dock and bay subdrivers is currently
broken anyway...
Userspace needs some love to support the two-stage ejection nicely,
but it is simple enough to do through udev rules (you don't even need
HAL) so this wouldn't justify fixing the dock and bay subdrivers,
either.
That leaves warm-swap bays (_EJ3) support for thinkpad-acpi, as well
as support for the weird dock of the model 570, but since such support
has never left the "experimental" stage, it is also not a strong
enough reason to find a way to fix this code.
Users of ThinkPads with warm-swap bays are urged to request that _EJ3
support be added to the regular ACPI dock driver, if such feature is
indeed useful for them.
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
Currently, the ThinkPad-ACPI bay and dock drivers are completely
broken, and cause a NULL pointer derreference in kernel mode (and,
therefore, an OOPS) when they try to issue events (i.e. on dock,
undock, bay ejection, etc).
OTOH, the standard ACPI dock driver can handle the hotplug bays and
docks of the ThinkPads just fine (including batteries) as of 2.6.27.
In fact, it does a much better job of it than thinkpad-acpi ever did.
It is just not worth the hassle to find a way to fix this crap without
breaking the (deprecated) thinkpad-acpi dock/bay ABI. This is old,
deprecated code that sees little testing or use.
As a quick fix suitable for -stable backports, mark the thinkpad-acpi
bay and dock subdrivers as BROKEN in Kconfig. The dead code will be
removed by a later patch.
This fixes bugzilla #13669, and should be applied to 2.6.27 and later.
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Reported-by: Joerg Platte <jplatte@naasa.net>
Cc: stable@kernel.org
Signed-off-by: Len Brown <len.brown@intel.com>
Some systems may not support input events, or registering the input
handler may have failed. So check that an input device exists before
trying to set the docking and tablet mode state during resume.
Fixes: http://bugzilla.kernel.org/show_bug.cgi?id=13865
Reported-and-tested-by: Cédric Godin <cedric@belbone.be>
Signed-off-by: Frans Pop <elendil@planet.nl>
Acked-by: Matthew Garrett <mjg59@srcf.ucam.org>
Signed-off-by: Len Brown <len.brown@intel.com>
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (45 commits)
cnic: Fix ISCSI_KEVENT_IF_DOWN message handling.
net: irda: init spinlock after memcpy
ixgbe: fix for 82599 errata marking UDP checksum errors
r8169: WakeOnLan fix for the 8168
netxen: reset ring consumer during cleanup
net/bridge: use kobject_put to release kobject in br_add_if error path
smc91x.h: add config for Nomadik evaluation kit
NET: ROSE: Don't use static buffer.
eepro: Read buffer overflow
tokenring: Read buffer overflow
at1700: Read buffer overflow
fealnx: Write outside array bounds
ixgbe: remove unnecessary call to device_init_wakeup
ixgbe: Don't priority tag control frames in DCB mode
ixgbe: Enable FCoE offload when DCB is enabled for 82599
net: Rework mdio-ofgpio driver to use of_mdio infrastructure
register at91_ether using platform_driver_probe
skge: Enable WoL by default if supported
net: KS8851 needs to depend on MII
be2net: Bug fix in the non-lro path. Size of received packet was not updated in statistics properly.
...
Fix another polarity error introduced by the rfkill rewrite,
this time in acer_rfkill_set().
Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (29 commits)
cxgb3: Fix crash caused by stashing wrong netdev_queue
ixgbe: Fix coexistence of FCoE and Flow Director in 82599
memory barrier: adding smp_mb__after_lock
net: adding memory barrier to the poll and receive callbacks
netpoll: Fix carrier detection for drivers that are using phylib
includecheck fix: include/linux, rfkill.h
p54: tx refused but queue active
Atheros Kconfig needs to be dependent on WLAN_80211
mac80211: fix docbook
mac80211_hwsim: avoid NULL access
ssb: Add support for 4318E
b43: Add support for 4318E
zd1211rw: adding SONY IFU-WLM2 (054c:0257) as a zd1211b device
zd1211rw: 07b8:6001 is a ZD1211B
r6040: bump driver version to 0.24 and date to 08 July 2009
r6040: restore MIER register correctly when IRQ line is shared
ipv4: Fix fib_trie rebalancing, part 4 (root thresholds)
davinci_emac: fix kernel oops when changing MAC address while interface is down
igb: set lan id prior to configuring phy
mac80211: minstrel: avoid accessing negative indices in rix_to_ndx()
...
Fix the third (I think) polarity error I accidentally
introduced in the rfkill rewrite to make wireless work
again on (certain?) HP laptops.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Tested-by: Maciej Rutecki <maciej.rutecki@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
FYI, there's a post-rc1 build regression with certain configs:
drivers/built-in.o: In function `pci_hp_deregister':
(.text+0xb166): undefined reference to `pci_hp_remove_module_link'
drivers/built-in.o: In function `pci_hp_deregister':
(.text+0xb19f): undefined reference to `pci_destroy_slot'
drivers/built-in.o: In function `__pci_hp_register':
(.text+0xb583): undefined reference to `pci_create_slot'
drivers/built-in.o: In function `__pci_hp_register':
(.text+0xb5b1): undefined reference to `pci_hp_create_module_link'
make: *** [.tmp_vmlinux1] Error 1
Caused by:
| 2b121bc262 is first bad commit
| commit 2b121bc262
| Date: Thu Jun 25 13:25:36 2009 +0200
|
| eeepc-laptop: Register as a pci-hotplug device
which changed the driver to use the PCI hotplug infrastructure, but
didn't do a good job on the Kconfig rules.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Acked-by: Len Brown <len.brown@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
CMSG is an ACPI method used to find features available on
an Eee PC. But some features are never repported, even if present.
If the getter of a feature is present, this patch will set
the corresponding bit in cmsg.
Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Len Brown <len.brown@intel.com>
If there is there is no getter defined, get_acpi()
will return -ENODEV.
Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Len Brown <len.brown@intel.com>
Refactor rfkill code, because we'll add another
rfkill for wwan3g later.
Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Len Brown <len.brown@intel.com>
Convert the unusual printk(EEEPC_<level> uses to
the more standard pr_fmt and pr_<level>(.
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Len Brown <len.brown@intel.com>
The eee contains a logically (but not physically) hotpluggable PCIe slot.
Currently this is handled by adding or removing the PCI device in response
to rfkill events, but if a user has forced pciehp to bind to it (with the
force=1 argument) then both drivers will try to handle the event and
hilarity (in the form of oopses) will ensue. This can be avoided by having
eee-laptop register the slot as a hotplug slot. Only one of pciehp and
eee-laptop will successfully register this, avoiding the problem.
Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Tested-by: Darren Salt <linux@youmustbejoking.demon.co.uk>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Convert the unusual printk(ASUS_<level> uses to
the more standard pr_fmt and pr_<level>(.
Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Len Brown <len.brown@intel.com>
Limit cpufv input to acceptables values.
Add an available_cpufv file to show available
presets.
Change cpufv ouput format from %d to %#x, it won't
break compatibility with existing userspace tools, but
it provide a more human readable output.
Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Len Brown <len.brown@intel.com>
In the default Eee PC distribution, there is a modified
asus_acpi driver. eeepc-laptop is a cleaned version of this
driver. Sync ASL enum and getter/setters with asus_acpi.
Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Len Brown <len.brown@intel.com>
asus-laptop have been merged in the kernel two years ago,
it is now stable and used by most distribution instead of
the old asus_acpi driver.
Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Len Brown <len.brown@intel.com>
The bug tracker have moved from sourceforge to
http://dev.iksaif.net . The homepage of the project
is now http://acpi4asus.sf.net with links to the new
bug tracker. No change for the mailing list.
Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Len Brown <len.brown@intel.com>
Makes asus-laptop platform device the parent device of
backlight and led classes.
With this patch, leds and backlight are also available in
/sys/devices/platform/asus-laptop/ like thinkpad_acpi.
Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Len Brown <len.brown@intel.com>
If we leave the camera disabled by default, userspace programs (e.g.
Skype, Cheese) leave the user out in the cold saying that the machine
"has no camera." Therefore, it's better to enable camera by default and
let people who really don't want it just disable the thing.
To reduce power usage you should enable USB autosuspend:
echo -n auto > /sys/bus/usb/drivers/uvcvideo/*:*/../power/level
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Len Brown <len.brown@intel.com>
Acerhdf is a driver for Acer Aspire One netbooks. It allows
to access the temperature sensor and to control the fan.
Signed-off-by: Peter Feuerer <peter@piie.net>
Signed-off-by: Andreas Mohr <andi@lisas.de>
Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Len Brown <len.brown@intel.com>
"rfkill: rewrite" incorrectly reversed
the meaning of 'state' in acer_rfkill_update() when it changed
rfkill_force_state() to rfkill_set_sw_state(). Fix it.
Signed-off-by: Troy Moure <twmoure@szypr.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This will respect state changes over hibernation, e.g. if the user
disables the wireless in the BIOS setup screen.
It reveals an issue where ACPI silently kills the wireless on
suspend. Normally, the BIOS restores the correct state from
non-volatile storage on boot. But when hibernation is aborted,
the wireless would remain killed. Fortunately we can work around
this in the resume handler by simply writing back the same value we
read from NVS.
Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
The setting of the "persistent" flag is also made more explicit using
a new rfkill_init_sw_state() function, instead of special-casing
rfkill_set_sw_state() when it is called before registration.
Suspend is a bit of a corner case so we try to get away without adding
another hack to rfkill-input - it's going to be removed soon.
If the state does change over suspend, users will simply have to prod
rfkill-input twice in order to toggle the state.
Userspace policy agents will be able to implement a more consistent user
experience. For example, they can avoid the above problem if they
toggle devices individually. Then there would be no "global state"
to get out of sync.
Currently there are only two rfkill drivers with persistent soft-blocked
state. thinkpad-acpi already checks the software state on resume.
eeepc-laptop will require modification.
Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
CC: Marcel Holtmann <marcel@holtmann.org>
Acked-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Support reading the tachometer of the auxiliary fan of a X60/X61.
It was found out by sheer luck, that bit 0 of EC register 0x31
(formely HBRV) selects which fan is active for tachometer readings
through EC 0x84/0x085: 0 for fan1, 1 for fan2.
Many thanks to Christoph Kl??nter, to Whoopie, and to weasel, who
helped confirm that behaviour.
Fan control through EC HFSP applies to both fans equally, regardless
of the state of bit 0 of EC 0x31. That matches the way the DSDT uses
HFSP.
In order to better support the secondary fan, export a second
tachometer over hwmon, and add defensive measures to make sure we are
reading the correct tachometer.
Support for the second fan is whitelist-based, as I have not found
anything obvious to look for in the DSDT to detect the presence of
the second fan.
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
Forcing thinkpad-acpi to do EC-based brightness control (HBRV) on a
X61 has very... interesting effects, instead of doing nothing (since
it doesn't have EC-based backlight control), it causes "weirdness" in
the fan tachometer readings, for example.
This means the EC register that used to be HBRV has been reused by
Lenovo for something else, but they didn't remove it from the DSDT.
Make sure the documentation reflects this data, and forbid the user
from forcing the driver to access HBRV on Lenovo ThinkPads.
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
This patch adds a .notify() method. The presence of .notify() causes
Linux/ACPI to manage event handlers and notify handlers on our behalf,
so we don't have to install and remove them ourselves.
This driver relies on seeing system notify events, not device-specific
ones (because it used ACPI_SYSTEM_NOTIFY). We use the
ACPI_DRIVER_ALL_NOTIFY_EVENTS driver flag to request all events, then
just ignore any device events we get.
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
CC: Corentin Chary <corentincj@iksaif.net>
CC: acpi4asus-user@lists.sourceforge.net
CC: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This patch adds a .notify() method. The presence of .notify() causes
Linux/ACPI to manage event handlers and notify handlers on our behalf,
so we don't have to install and remove them ourselves.
This driver relies on seeing system notify events, not device-specific
ones (because it used ACPI_SYSTEM_NOTIFY). We use the
ACPI_DRIVER_ALL_NOTIFY_EVENTS driver flag to request all events, then
just ignore any device events we get.
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
CC: Corentin Chary <corentincj@iksaif.net>
CC: Karol Kozimor <sziwan@users.sourceforge.net>
CC: acpi4asus-user@lists.sourceforge.net
Signed-off-by: Len Brown <len.brown@intel.com>
This patch adds a .notify() method. The presence of .notify() causes
Linux/ACPI to manage event handlers and notify handlers on our behalf,
so we don't have to install and remove them ourselves.
This driver apparently relies on seeing ALL notify events, not just
device-specific ones (because it used ACPI_ALL_NOTIFY). We use the
ACPI_DRIVER_ALL_NOTIFY_EVENTS driver flag to request all events.
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
CC: Corentin Chary <corentincj@iksaif.net>
CC: acpi4asus-user@lists.sourceforge.net
Signed-off-by: Len Brown <len.brown@intel.com>
HP tablets send a WMI event when a tablet state change occurs, but use the
same method as is used for reporting docking and undocking. The same query
is used to obtain the state of the hardware. Bit 0 indicates the docking
state, while bit 2 indicates the tablet state. This patch breaks these out
and sends separate input events for tablet and dock state changes. An
additional sysfs file is added to report the tablet state.
Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Len Brown <len.brown@intel.com>
There's no point in generating kernel messages if we didn't receive a
parsable keyboard event - only do so if there appeared to be a scancode.
Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Len Brown <len.brown@intel.com>
Upcoming Dell hardware will send more keyboard events via WMI. Add
support for them.
Signed-off-by: Mario Limonciello <mario_limonciello@dell.com>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Len Brown <len.brown@intel.com>
In debugging with some future machines that actually contain BIOS level
support for dell-wmi, I've determined that the upper half of the data that
comes back from wmi_get_event_data may sometimes contain extra information
that isn't currently relevant when pulling scan codes out of the data.
This causes dell-wmi to improperly respond to these events.
Signed-off-by: Mario Limonciello <mario_limonciello@dell.com>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Len Brown <len.brown@intel.com>
Make use of acpi_video_backlight_support() also in hotkey_init, to make
sure this doesn't happen:
thinkpad_acpi: This ThinkPad has standard ACPI backlight brightness
control, supported by the ACPI video driver
thinkpad_acpi: Disabling thinkpad-acpi brightness events by default...
thinkpad_acpi: Standard ACPI backlight interface not available,
thinkpad_acpi native brightness control enabled
thinkpad_acpi: detected a 16-level brightness capable ThinkPad
Note that this is purely cosmetic, there is absolutely _no_ change in
behaviour. Those events are sometimes enabled at runtime by userspace, but
the driver never enables them by itself unless someone messed with the
default keymaps.
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Reported-by: Jochen Schulz <jrschulz@well-adjusted.de>
Signed-off-by: Len Brown <len.brown@intel.com>
Add support for extra LEDs on recent ThinkPads, and avoid registering
with the led class the LEDs which are not available for a given
ThinkPad model.
All non-restricted LEDs are always available through the procfs
interface, as the firmware doesn't care if an attempt is made to
access an invalid LED.
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
Alan Jenkins