Commit Graph

440 Commits

Author SHA1 Message Date
Linus Torvalds
d1794f2c5b Merge branch 'bkl-removal' of git://git.lwn.net/linux-2.6
* 'bkl-removal' of git://git.lwn.net/linux-2.6: (146 commits)
  IB/umad: BKL is not needed for ib_umad_open()
  IB/uverbs: BKL is not needed for ib_uverbs_open()
  bf561-coreb: BKL unneeded for open()
  Call fasync() functions without the BKL
  snd/PCM: fasync BKL pushdown
  ipmi: fasync BKL pushdown
  ecryptfs: fasync BKL pushdown
  Bluetooth VHCI: fasync BKL pushdown
  tty_io: fasync BKL pushdown
  tun: fasync BKL pushdown
  i2o: fasync BKL pushdown
  mpt: fasync BKL pushdown
  Remove BKL from remote_llseek v2
  Make FAT users happier by not deadlocking
  x86-mce: BKL pushdown
  vmwatchdog: BKL pushdown
  vmcp: BKL pushdown
  via-pmu: BKL pushdown
  uml-random: BKL pushdown
  uml-mmapper: BKL pushdown
  ...
2008-07-14 14:48:31 -07:00
Jonathan Corbet
2fceef397f Merge commit 'v2.6.26' into bkl-removal 2008-07-14 15:29:34 -06:00
Arnd Bergmann
0410e689b1 sony-laptop: BKL pushdown
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2008-07-02 15:06:25 -06:00
Sedji Gaouaou
8405996ff6 atmel_pwm: Rename the "mck" clock to "pwm_clk"
The name "mck" causes a conflict on AT91. Call it "pwm_clk" instead.

Signed-off-by: Sedji Gaouaou <sedji.gaouaou@atmel.com>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
2008-06-27 15:32:30 +02:00
Arnd Bergmann
4a7e79a7de hdpu_cpustate: BKL pushdown
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2008-06-20 14:05:57 -06:00
Jonathan Corbet
4541b5ec9f phantom: BKL pushdown
Add explicit lock_kernel calls to phantom_open().

Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2008-06-20 14:05:51 -06:00
Henrique de Moraes Holschuh
24e45bbe69 thinkpad-acpi: fix LED handling on older ThinkPads
The less tested codepaths for LED handling, used on ThinkPads 570, 600e/x,
770e, 770x, A21e, A2xm/p, T20-22, X20 and maybe a few others, would write
data to kernel memory it had no business touching, for leds number 3 and
above.  If one is lucky, that illegal write would cause an OOPS, but
chances are it would silently corrupt a byte.

The problem was introduced in commit af116101, "ACPI: thinkpad-acpi: add
sysfs led class support to thinkpad leds (v3.2)".

Fix the bug by refactoring the entire code to be far more obvious on what
it wants to do.  Also do some defensive "constification".

Issue reported by Karol Lewandowski <lmctlx@gmail.com> (he's an lucky guy
and got an OOPS instead of silent corruption :-) ).

Root cause of the OOPS identified by Adrian Bunk <bunk@kernel.org>.
Thanks, Adrian!

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Tested-by: Karol Lewandowski <lmctlx@gmail.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-06-11 19:13:45 -04:00
Henrique de Moraes Holschuh
9c0a76e16e thinkpad-acpi: fix initialization error paths
Rework some subdriver init and exit handlers, in order to fix some
initialization error paths that were missing, or broken.

Hitting those bugs should be extremely rare in the real world, but should
that happen, thinkpad-acpi would fail to dealocate some resources and a
reboot might well be needed to be able to load the driver again.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-06-11 19:13:45 -04:00
Henrique de Moraes Holschuh
197a2cd907 thinkpad-acpi: SW_RADIO to SW_RFKILL_ALL rename
Rename SW_RADIO to SW_RFKILL_ALL in thinkpad-acpi code and docs, following
5adad01339 "Input: rename SW_RADIO to
SW_RFKILL_ALL".

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-06-11 19:13:45 -04:00
Dan Williams
a361a82c10 fujitsu-laptop: autoload module on Lifebook P1510D
Signed-off-by: Dan Williams <dcbw@redhat.com>
Cc: Jonathan Woithe <jwoithe@physics.adelaide.edu.au>
Cc: Len Brown <len.brown@intel.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>
2008-06-06 11:29:09 -07:00
Linus Torvalds
3b5b60b821 Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb:
  kgdbts: Use HW breakpoints with CONFIG_DEBUG_RODATA
  kgdb: use common ascii helpers and put_unaligned_be32 helper
2008-06-04 08:08:27 -07:00
Harvey Harrison
e3aa51fecd acpi: fix sparse const errors
In this case we want a constant pointer to constant chars:

drivers/misc/thinkpad_acpi.c:3824:19: error: Just how const do you want this type to be?

Like the error says.

drivers/misc/thinkpad_acpi.c:3863:19: error: Just how const do you want this type to be?
drivers/misc/thinkpad_acpi.c:3864:19: error: Just how const do you want this type to be?
drivers/misc/thinkpad_acpi.c:3865:19: error: Just how const do you want this type to be?
drivers/misc/thinkpad_acpi.c:3866:19: error: Just how const do you want this type to be?

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Acked-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-05-30 07:43:24 -07:00
Jason Wessel
b33cb815b5 kgdbts: Use HW breakpoints with CONFIG_DEBUG_RODATA
Whenever CONFIG_DEBUG_RODATA is set in the kernel config many kernel
text sections become read-only, and the use of software breakpoints in
the kgdb tests will cause the kernel to fail to complete the start up.

Until such time that there is an official API for modifying read-only
text sections hardware breakpoints must be used to run the do_fork or
sys_open tests or the tests get skipped.

Also fix the duplicated include reported by:
Huang Weiyi <weiyi.huang@gmail.com>

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
2008-05-28 12:49:57 -05:00
Harvey Harrison
827e609b45 kgdb: use common ascii helpers and put_unaligned_be32 helper
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
2008-05-28 12:49:56 -05:00
Dean Nelson
64d032ba43 drivers/misc/sgi-xp: replace partid_t with a short
In preparation for supporting greater than 64 partitions replace partid_t by
short in drivers/misc/sgi-xp.

Signed-off-by: Dean Nelson <dcn@sgi.com>
Acked-by: Robin Holt <holt@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-05-13 08:02:23 -07:00
Dean Nelson
65c17b801e drivers/misc/sgi-xp: clean up return values
Make XP return values more generic to XP and not so tied to XPC by changing
enum xpc_retval to xp_retval, along with changing return value prefixes from
xpc to xp.  Also, cleanup a comment block that referenced some of these return
values as well as the handling of BTE related return values.

Signed-off-by: Dean Nelson <dcn@sgi.com>
Acked-by: Robin Holt <holt@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-05-13 08:02:23 -07:00
Jason Wessel
7cfcd985d3 kgdb: 1000 loops for the single step test in kgdbts
The single step test is not terribly costly and it should be able to
pass at 1000 loops successfully in under 1 second.  A non-kgdb timing
regression was found using this test, but it did not occur frequently
because by default the test was only executed a single time.

This patch changes the default for the single step test to 1000
iterations and allows for individual configuration of the single step
test to further exercise the kgdb subsystem when needed.

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
2008-05-05 07:13:21 -05:00
Harvey Harrison
001fddf5fd kgdb: trivial sparse fixes in kgdb test-suite
Shadowed variable and integer as NULL pointer fixes:
drivers/misc/kgdbts.c:877:6: warning: symbol 'sys_open_test' shadows an earlier one
drivers/misc/kgdbts.c:537:27: originally declared here
drivers/misc/kgdbts.c:378:22: warning: Using plain integer as NULL pointer
drivers/misc/kgdbts.c:386:22: warning: Using plain integer as NULL pointer
drivers/misc/kgdbts.c:468:30: warning: Using plain integer as NULL pointer
drivers/misc/kgdbts.c:472:15: warning: Using plain integer as NULL pointer
drivers/misc/kgdbts.c:502:30: warning: Using plain integer as NULL pointer
drivers/misc/kgdbts.c:506:30: warning: Using plain integer as NULL pointer
drivers/misc/kgdbts.c:509:30: warning: Using plain integer as NULL pointer
drivers/misc/kgdbts.c:523:20: warning: Using plain integer as NULL pointer
drivers/misc/kgdbts.c:527:20: warning: Using plain integer as NULL pointer
drivers/misc/kgdbts.c:530:15: warning: Using plain integer as NULL pointer
drivers/misc/kgdbts.c:541:21: warning: Using plain integer as NULL pointer
drivers/misc/kgdbts.c:545:21: warning: Using plain integer as NULL pointer
drivers/misc/kgdbts.c:548:15: warning: Using plain integer as NULL pointer
drivers/misc/kgdbts.c:559:30: warning: Using plain integer as NULL pointer
drivers/misc/kgdbts.c:563:15: warning: Using plain integer as NULL pointer
drivers/misc/kgdbts.c:573:16: warning: Using plain integer as NULL pointer
drivers/misc/kgdbts.c:574:19: warning: Using plain integer as NULL pointer
drivers/misc/kgdbts.c:578:15: warning: Using plain integer as NULL pointer
drivers/misc/kgdbts.c:588:16: warning: Using plain integer as NULL pointer
drivers/misc/kgdbts.c:589:19: warning: Using plain integer as NULL pointer
drivers/misc/kgdbts.c:593:15: warning: Using plain integer as NULL pointer
drivers/misc/kgdbts.c:602:16: warning: Using plain integer as NULL pointer
drivers/misc/kgdbts.c:604:15: warning: Using plain integer as NULL pointer
drivers/misc/kgdbts.c:925:3: warning: Using plain integer as NULL pointer
drivers/misc/kgdbts.c:938:3: warning: Using plain integer as NULL pointer

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
2008-05-05 07:13:21 -05:00
Linus Torvalds
08acd4f8af Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: (179 commits)
  ACPI: Fix acpi_processor_idle and idle= boot parameters interaction
  acpi: fix section mismatch warning in pnpacpi
  intel_menlo: fix build warning
  ACPI: Cleanup: Remove unneeded, multiple local dummy variables
  ACPI: video - fix permissions on some proc entries
  ACPI: video - properly handle errors when registering proc elements
  ACPI: video - do not store invalid entries in attached_array list
  ACPI: re-name acpi_pm_ops to acpi_suspend_ops
  ACER_WMI/ASUS_LAPTOP: fix build bug
  thinkpad_acpi: fix possible NULL pointer dereference if kstrdup failed
  ACPI: check a return value correctly in acpi_power_get_context()
  #if 0 acpi/bay.c:eject_removable_drive()
  eeepc-laptop: add hwmon fan control
  eeepc-laptop: add backlight
  eeepc-laptop: add base driver
  ACPI: thinkpad-acpi: bump up version to 0.20
  ACPI: thinkpad-acpi: fix selects in Kconfig
  ACPI: thinkpad-acpi: use a private workqueue
  ACPI: thinkpad-acpi: fluff really minor fix
  ACPI: thinkpad-acpi: use uppercase for "LED" on user documentation
  ...

Fixed conflicts in drivers/acpi/video.c and drivers/misc/intel_menlow.c
manually.
2008-04-30 11:52:52 -07:00
Len Brown
96916090f4 Merge branches 'release', 'acpica', 'bugzilla-10224', 'bugzilla-9772', 'bugzilla-9916', 'ec', 'eeepc', 'idle', 'misc', 'pm-legacy', 'sysfs-links-2.6.26', 'thermal', 'thinkpad' and 'video' into release 2008-04-30 13:58:00 -04:00
Linus Torvalds
7cece14acd Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
  sparc64: remove duplicated include
  sparc: Add kgdb support.
  kgdbts: Sparc needs sstep emulation.
  sparc32: Kill smp_message_pass() and related code.
  sparc64: Kill PIL_RESERVED, unused.
  sparc64: Split entry.S up into seperate files.
2008-04-30 08:46:16 -07:00
Dean Nelson
e4a064dfa2 [IA64] allocate multiple contiguous pages via uncached allocator
Enable the uncached allocator to allocate multiple pages of contiguous
uncached memory.

Signed-off-by: Dean Nelson <dcn@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-04-29 13:49:01 -07:00
Len Brown
7aa0f1a8b1 intel_menlo: fix build warning
drivers/misc/intel_menlow.c:191: warning: label ‘unregister’ defined but not used

Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29 12:24:24 -04:00
Denis V. Lunev
c7705f3449 drivers: use non-racy method for proc entries creation (2)
Use proc_create()/proc_create_data() to make sure that ->proc_fops and ->data
be setup before gluing PDE to main tree.

Signed-off-by: Denis V. Lunev <den@openvz.org>
Cc: Greg Kroah-Hartman <gregkh@suse.de>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Peter Osterlund <petero2@telia.com>
Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Cc: Dmitry Torokhov <dtor@mail.ru>
Cc: Neil Brown <neilb@suse.de>
Cc: Mauro Carvalho Chehab <mchehab@infradead.org>
Cc: Bjorn Helgaas <bjorn.helgaas@hp.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29 08:06:22 -07:00
Alexey Dobriyan
c74c120a21 proc: remove proc_root from drivers
Remove proc_root export.  Creation and removal works well if parent PDE is
supplied as NULL -- it worked always that way.

So, one useless export removed and consistency added, some drivers created
PDEs with &proc_root as parent but removed them as NULL and so on.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29 08:06:18 -07:00
Julia Lawall
3a8ca95e9d drivers/misc: elide a non-zero test on a result that is never 0
The function thermal_cooling_device_register always returns either a valid
pointer or a value made with ERR_PTR, so a test for non-zero on the result
will always succeed.

The problem was found using the following semantic match.
(http://www.emn.fr/x-info/coccinelle/)

//<smpl>
@a@
expression E, E1;
statement S,S1;
position p;
@@

E = thermal_cooling_device_register(...)
... when != E = E1
if@p (E) S else S1

@n@
position a.p;
expression E,E1;
statement S,S1;
@@

E = NULL
... when != E = E1
if@p (E) S else S1

@depends on !n@
expression E;
statement S,S1;
position a.p;
@@

* if@p (E)
  S else S1
//</smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Cc: Thomas Sujith <sujith.thomas@intel.com>
Cc: Len Brown <len.brown@intel.com>
Cc: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29 08:06:04 -07:00
Harvey Harrison
6e574195b7 drivers/misc: replace remaining __FUNCTION__ occurrences
__FUNCTION__ is gcc-specific, use __func__

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29 08:06:03 -07:00
Jiri Slaby
7d4f9f094b Misc, phantom, fix poll
Return ERR even if there are pending data, but hw is not running.  Do not
decrement count in poll, do it in ioctl, where data are actually read.

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29 08:06:02 -07:00
Jiri Slaby
7e4e8e689f Misc: phantom, add compat ioctl
Openhaptics uses pointers in _IOC() macros, implement compat for them. Also
add _IOC alternatives which are not 32/64 bit dependent (structures
passed through aren't yet) -- libphantom will use them.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29 08:06:02 -07:00
Ingo Molnar
e7ae1e7ef9 ACER_WMI/ASUS_LAPTOP: fix build bug
randconfig testing in x86.git found the following upstream build bug:

 drivers/built-in.o: In function `acer_led_exit':
 acer-wmi.c:(.text+0xdc76e): undefined reference to `led_classdev_unregister'
 drivers/built-in.o: In function `acer_platform_probe':
 acer-wmi.c:(.devinit.text+0x63e6): undefined reference to `led_classdev_register'

which was due to acer-wmi.o only depending on CONFIG_LEDS_CLASS, while
also using a symbol offered by CONFIG_NEW_LEDS. Also fix a similar bug
in CONFIG_ASUS_LAPTOP.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29 10:10:04 -04:00
Cyrill Gorcunov
90fe17f4df thinkpad_acpi: fix possible NULL pointer dereference if kstrdup failed
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Acked-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29 10:10:03 -04:00
Corentin Chary
e1faa9da28 eeepc-laptop: add hwmon fan control
Adds an hwmon interface to control the fan.

Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29 10:08:07 -04:00
Corentin Chary
a5fa429b4b eeepc-laptop: add backlight
Add backlight class support to the eeepc-laptop driver.

Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29 10:08:07 -04:00
Eric Cooper
e59f87966a eeepc-laptop: add base driver
This patch is based on Eric Cooper's work to clean the original asus_acpi
given by Asus.  It's a platform driver (/sys/devices/platform/eeepc/)
wich support:
     - hotkeys - wlan on/off - camera on/off - cardr on/off

Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29 10:08:06 -04:00
Henrique de Moraes Holschuh
68f12ae5d7 ACPI: thinkpad-acpi: bump up version to 0.20
Full LED sysfs support, and the rest of the assorted minor fixes and
enhancements are a good reason to checkpoint a new version...

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29 09:47:03 -04:00
Henrique de Moraes Holschuh
3f6cb5630a ACPI: thinkpad-acpi: fix selects in Kconfig
Add missing select for BACKLIGHT_LCD_SUPPORT, as select doesn't select the
dependencies of a symbol for us.

Also, "select INPUT" in Kconfig.  We are not an Input device, nor are we
anywhere close to the input subsystem in the Kconfig tree, so using
"depends on INPUT" is not user-friendly at all.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29 09:47:03 -04:00
Henrique de Moraes Holschuh
e0e3c0615a ACPI: thinkpad-acpi: use a private workqueue
Switch all task workers to a private thinkpad-acpi workqueue.

This way, we don't risk causing trouble for other tasks scheduled to the
default work queue, as our workers end up needing to access the ACPI EC,
run ACPI AML code, trigger SMI traps... and none of those are exactly known
to be fast, simple operations.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29 09:47:03 -04:00
Henrique de Moraes Holschuh
10cc92759b ACPI: thinkpad-acpi: fluff really minor fix
Fix a minor (nano?) thing that bothered me at exactly at the wrong time.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29 09:47:02 -04:00
Henrique de Moraes Holschuh
af11610192 ACPI: thinkpad-acpi: add sysfs led class support to thinkpad leds (v3.2)
Add a sysfs led class interface to the led subdriver.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29 09:47:02 -04:00
Henrique de Moraes Holschuh
e306501d1c ACPI: thinkpad-acpi: add sysfs led class support for thinklight (v3.1)
Add a sysfs led class interface to the thinklight (light subdriver).

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29 09:47:01 -04:00
Henrique de Moraes Holschuh
4fa6811b8a ACPI: thinkpad-acpi: prepare light and LED for sysfs support
Do some preparatory work to add sysfs support to the thinklight and
thinkpad leds driver.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29 09:47:01 -04:00
Henrique de Moraes Holschuh
95e57ab2cb ACPI: thinkpad-acpi: claim tpacpi as an official short handle (v1.1)
Unfortunately, a lot of stuff in the kernel has size limitations, so
"thinkpad-acpi" ends up eating up too much real estate.  We were using
"tpacpi" in symbols already, but this shorthand was not visible to
userland.

Document that the driver will use tpacpi as a short hand where necessary,
and use it to name the kernel thread for NVRAM polling (now named
"ktpacpi_nvramd").

Also, register a module alias with the shorthand.  One can refer to the
module using the shorthand name.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29 09:47:01 -04:00
Henrique de Moraes Holschuh
e11aecf137 ACPI: thinkpad-acpi: fix brightness dimming control bug
ibm-acpi and thinkpad-acpi did not know about bit 5 of the EC backlight
level control register (EC 0x31), so it was always forced to zero on
any writes.

This would disable the BIOS option to *not* use a dimmer backlight level
scale while on battery, and who knows what else (there are two other
control bits of unknown function).

Bit 5 controls the "reduce backlight levels when on battery" optional
functionality (active low).  Bits 6 and 7 are better left alone as well,
instead of being forced to zero.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29 09:47:01 -04:00
Henrique de Moraes Holschuh
2d5e94d7ca ACPI: thinkpad-acpi: rate-limit CMOS/EC unsynced error messages
If userspace applications mess with the CMOS NVRAM, or something causes
both the ACPI firmware and thinkpad-acpi to try to change the brightness at
the same time, it is possible to have the CMOS and EC registers for the
current brightness go out of sync.

Should that happen, thinkpad-acpi could be really obnoxious when using a
brightness_mode of 3 (both EC and CMOS).  Instead of complaining a massive
number of times, make sure to complain only once until EC and CMOS are back
in sync.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Cc: Joerg Platte <lists@naasa.net>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29 09:47:00 -04:00
Henrique de Moraes Holschuh
8c74adbc69 ACPI: thinkpad-acpi: enhance box identification output (v2)
During initialization, thinkpad-acpi outputs some messages to make sure
releavant box identification information is easily available in-line with
the rest of the driver messages.

Enhance those messages to output the alfanumeric model number as well.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29 09:47:00 -04:00
Henrique de Moraes Holschuh
9288902225 ACPI: thinkpad-acpi: warn once about weird hotkey masks
thinkpad-acpi knows for a while now how to best program the hotkeys by
default, and always enable them by default.  Unfortunately, this
information has not filtered down everywhere it needs to, yet.  Notably,
old ibm-acpi documentation and most "thinkpad setup guides" will have wrong
information on this area.

Warn the local admin once whenever any of the following patterns are met:

1. Attempts to set hotkey mask to 0xffff (artifact from docs and config
   for the old ibm-acpi driver and behaviour).  This mask makes no
   real-world sense;

2. Attempts to set hotkey mask to 0xffffffff, which means the user is
   trying to just have "everything work" without even reading the
   documentation, or that we need to get a bug report, because there
   is a new thinkpad out there with new exciting hot keys :-)

3. Attempts to set hotkey mask to 0xffffff, which is almost never the
   correct way to set up volume and brightness event reporting (and with
   the current state-of-the-art, it is known to never be right way to do
   it).

The driver will perform any and all requested operations, though,
regardless of any warnings.  I hope these warnings can be removed one or
two years from now.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29 09:47:00 -04:00
Henrique de Moraes Holschuh
b59727965d ACPI: thinkpad-acpi: BIOS backlight mode helper (v2.1)
Lenovo ThinkPads with generic ACPI backlight level control can be easily
set to react to keyboard brightness key presses in a more predictable way
than what they do when in "DOS / bootloader" mode after Linux brings
up the ACPI interface.

The switch to the ACPI backlight mode in the firmware is designed to be
safe to use only as an one way trapdoor.  One is not to force the firmware
to switch back to "DOS/bootloader" mode except by rebooting.  The mode
switch itself is performed by calling any of the ACPI _BCL methods at least
once.

When in ACPI mode, the backlight firmware just issues (standard) events for
the brightness up/down hot key presses along with the non-standard HKEY
events which thinkpad-acpi traps, and doesn't touch the hardware.

thinkpad-acpi will:

1. Place the ThinkPad firmware in ACPI backlight control mode
   if one is available
2. Suppress HKEY backlight change notifications by default
   to avoid double-reporting when ACPI video is loaded when
   the ThinkPad is in ACPI backlight control mode
3. Urge the user to load the ACPI video driver

The user is free to use either the ACPI video driver to get the brightness
key events, or to override the thinkpad-acpi default hotkey mask to get
them from thinkpad-acpi as well (this will result in duplicate events if
ACPI video is loaded, so let's hope distros won't screw this up).

Provided userspace is sane, all should work (and *keep* working), which is
more that can be said about the non-ACPI mode of the new Lenovo ThinkPad
BIOSes when coupled to current userspace and X.org drivers.

Full guidelines for backlight hot key reporting and use of the
thinkpad-acpi backlight interface have been added to the documentation.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Cc: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: Thomas Renninger <trenn@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29 09:46:59 -04:00
David S. Miller
4d7ffa4990 kgdbts: Sparc needs sstep emulation.
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-04-29 01:36:14 -07:00
Julia Lawall
9030062f3d ACPI: elide a non-zero test on a result that is never 0
thermal_cooling_device_register used to return NULL if THERMAL is "n".
As the ACPI fan, processor and video drivers SELECT the generic
thermal in PATCH 01, this is not a problem any more.

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29 02:52:45 -04:00
Zhang Rui
63c4ec905d thermal: add the support for building the generic thermal as a module
Build the generic thermal driver as module "thermal_sys".

Make ACPI thermal, video, processor and fan SELECT the generic
thermal driver, as these drivers rely on it to build the sysfs I/F.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Acked-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29 02:44:00 -04:00