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* ALSA: snd-usb-caiaq: Missing lock around use of buffer positionsMark Hills2009-10-301-3/+9
| | | | | | | | Fix a race which causes snd_pcm_update_hw_ptr_pos() to report a bug. Signed-off-by: Mark Hills <mark@pogo.org.uk> Acked-by: Daniel Mack <daniel@caiaq.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* ALSA: sound/parisc: Move dereference after NULL testJulia Lawall2009-10-301-1/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | If the NULL test on h is needed in snd_harmony_mixer_init, then the dereference should be after the NULL test. Actually, there is a sequence of calls: snd_harmony_create, then snd_harmony_pcm_init, and then snd_harmony_mixer_init. snd_harmony_create initializes h, but may indeed leave it as NULL. There was no NULL test at the beginning of snd_harmony_pcm_init, so I have added one. The NULL test in snd_harmony_mixer_init is then not necessary, but in case the ordering of the calls changes, I have left it, and moved the dereference after it. A simplified version of the semantic match that detects this problem is as follows (http://coccinelle.lip6.fr/): // <smpl> @match exists@ expression x, E; identifier fld; @@ * x->fld ... when != \(x = E\|&x\) * x == NULL // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* ALSA: sound: Move dereference after NULL test and drop unnecessary NULL testsJulia Lawall2009-10-303-5/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | In pcm.c, if the NULL test on pcm is needed, then the dereference should be after the NULL test. In dummy.c and ali5451.c, the context of the calls to snd_card_dummy_new_mixer and snd_ali_free_voice show that dummy and pvoice, respectively cannot be NULL. A simplified version of the semantic match that detects this problem is as follows (http://coccinelle.lip6.fr/): // <smpl> @match exists@ expression x, E; identifier fld; @@ * x->fld ... when != \(x = E\|&x\) * x == NULL // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* ALSA: pcsp - Fix nforce workaroundStas Sergeev2009-10-302-32/+35
| | | | | | | | | | | | | The attached patch fixes the problems introduced in this commit: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=eea0579fc85e64e9f05361d5aacf496fe7a151aa - Fix nForce workaround by honouring the pointer_update var - Revert "ns" to u64, as per the hrtimer API - Revert to the zero-delay timer startup, since I can't reproduce any problem with it (please, give me the hint!) Signed-off-by: Stas Sergeev <stsp@aknet.ru> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* ALSA: SND_CS5535AUDIO: Remove the X86 platform dependencyWu Zhangjin2009-10-301-1/+0
| | | | | | | | | | | SND_CS5535AUDIO is available on Loongson(MIPS compatible) family machines, and checked it with ARCH=x86_64, no relative compiling warnings & errors, so, remove the platform dependency directly. Reported-by: rixed@happyleptic.org Acked-by: Andres Salomon <dilinger@collabora.co.uk> Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* Merge branch 'fix/hda' into for-linusTakashi Iwai2009-10-134-8/+55
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| * ALSA: hda - Allow all formats as default for Nvidia HDMITakashi Iwai2009-10-131-1/+1
| | | | | | | | | | | | | | | | | | | | | | In the commit f0613d5752d8f7d1d02e6d40947f38877fdf9c90 ALSA: hda - Add full rates/formats support for Nvidia HDMI the flag LIMITIED_RATE_FMT_SUPPORT was set as default, as I forgot to clear before commit. Let's enable all formats/rates as default. Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * ALSA: hda - Fix volume-knob setup for Dell laptops with STAC9228Takashi Iwai2009-10-131-1/+11
| | | | | | | | | | | | | | | | | | | | The volume-knob widget needs to be set with 0x7f instead of 0xff for Dell laptops with STAC9228 codec, too, like the previous commit. Reference: Novell bnc#545013 http://bugzilla.novell.com/show_bug.cgi?id=545013 Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * ALSA: hda - Fix mute sound with STAC9227/9228 codecsTakashi Iwai2009-10-132-0/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | On FSC laptops, the sound gets muted gradually when the volume is chnaged. This is due to the wrong volume-knob widget setup. The delta bit (bit 7) shouldn't be set for these devices. This patch adds a new quirk to set the value 0x7f to the widget 0x24 instead of 0xff. Reference: Novell bnc#546006 http://bugzilla.novell.com/show_bug.cgi?id=546006 Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * ALSA: hda - Fix overflow of spec->init_verbs in patch_realtek.cTakashi Iwai2009-10-131-1/+1
| | | | | | | | | | | | | | | | ALC861-VD lenovo model causes overflow of spec->init_verbs entries due to the recent changes. Simply increase the array size to avoid the overflow. Reported-by: Luca Tettamanti <kronos.it@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * ALSA: hda - Add full rates/formats support for Nvidia HDMITakashi Iwai2009-10-091-6/+25
| | | | | | | | | | | | | | | | | | | | | | | | Allow Nvidia HDMI to support more possible sample rates and formats. At best, the really supported rates and formats should be determined together with the negotiation with the HDMI receiver, but it's currently not implemented yet (Nvidia stuff seems incompatible with HDMI 1.3 standard in this regard). As a compromise, we enable all bits, assuming that all recent devices do support such rates/formats. Tested-by: Alan Alan <alanwww1@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* | ALSA: aaci: ARM1176 aaci-pl041 AC97 register read timeoutPhilby John2009-10-131-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | After a reboot on an ARM1176 which amounts to a softreset, it has been noted that the ALSA driver does not get registered and the probe fails with the error "aaci-pl041 fpga:04: ac97 read back fail". In the process of reading from a register the SL1TxBusy bit is set indicating that the transceiver is busy and remains so until the default timeout occurs. Set the Power down register 0x26 to an arbitrary value as specified in the PL041 manual (page: 3-18) so that AACISL1TX/AACISL2TX registers take their default state. Signed-off-by: Philby John <pjohn@in.mvista.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* | ALSA: bt87x - Add a whitelist for Pinnacle PCTV (11bd:0012)Takashi Iwai2009-10-131-0/+2
| | | | | | | | Signed-off-by: Takashi Iwai <tiwai@suse.de>
* | ALSA: ice1724 - Make call to set hw params succeed on ESI Juli@David Henningsson2009-10-111-1/+1
| | | | | | | | | | | | | | | | | | | | If two streams are started immediately after one another (such as a playback and a recording stream), the call to set hw params fails with EBUSY. This patch makes the call succeed, so playback and recording will work properly. Signed-off-by: David Henningsson <launchpad.web@epost.diwic.se> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* | ALSA: ice1724: Fix surround on Chaintech AV-710Robert Hancock2009-10-101-3/+5
| | | | | | | | | | | | | | | | | | | | | | | | Fix the num_total_dacs setting for Chaintech AV710. The existing comment that only PSDOUT0 is connected is correct, but since the card is using packed AC97 mode to send 6 channels to the codec, num_total_dacs should be set to 6 and not 2. This allows 6-channel surround to work. Also clarify a comment regarding the additional WM8728 codec on this card (it's connected to the SPDIF output and always receives the same data). Signed-off-by: Robert Hancock <hancockrwd@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* | Merge branch 'fix/misc' into for-linusTakashi Iwai2009-10-084-21/+42
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| * | ALSA: ice1724: increase SPDIF and independent stereo buffer sizesRobert Hancock2009-10-081-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Increase the default and maximum PCM buffer prellocation size for ice1724's SPDIF and independent stereo pair outputs to 256K, which is the hardware's maximum supported size. This allows a reduction in interrupt rate and potentially power usage when an application is not latency-critical. Signed-off-by: Robert Hancock <hancockrwd@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * | ALSA: opl3: circular locking in the snd_opl3_note_on() and snd_opl3_note_off()Krzysztof Helt2009-10-081-8/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix following circular locking in the opl3 driver. ======================================================= [ INFO: possible circular locking dependency detected ] 2.6.32-rc3 #87 ------------------------------------------------------- swapper/0 is trying to acquire lock: (&opl3->voice_lock){..-...}, at: [<cca748fe>] snd_opl3_note_off+0x1e/0xe0 [snd_opl3_synth] but task is already holding lock: (&opl3->sys_timer_lock){..-...}, at: [<cca75169>] snd_opl3_timer_func+0x19/0xc0 [snd_opl3_synth] which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&opl3->sys_timer_lock){..-...}: [<c02461d5>] validate_chain+0xa25/0x1040 [<c0246aca>] __lock_acquire+0x2da/0xab0 [<c024731a>] lock_acquire+0x7a/0xa0 [<c044c300>] _spin_lock_irqsave+0x40/0x60 [<cca75046>] snd_opl3_note_on+0x686/0x790 [snd_opl3_synth] [<cca68912>] snd_midi_process_event+0x322/0x590 [snd_seq_midi_emul] [<cca74245>] snd_opl3_synth_event_input+0x15/0x20 [snd_opl3_synth] [<cca4dcc0>] snd_seq_deliver_single_event+0x100/0x200 [snd_seq] [<cca4de07>] snd_seq_deliver_event+0x47/0x1f0 [snd_seq] [<cca4e50b>] snd_seq_dispatch_event+0x3b/0x140 [snd_seq] [<cca5008c>] snd_seq_check_queue+0x10c/0x120 [snd_seq] [<cca5037b>] snd_seq_enqueue_event+0x6b/0xe0 [snd_seq] [<cca4e0fd>] snd_seq_client_enqueue_event+0xdd/0x100 [snd_seq] [<cca4eb7a>] snd_seq_write+0xea/0x190 [snd_seq] [<c02827b6>] vfs_write+0x96/0x160 [<c0282c9d>] sys_write+0x3d/0x70 [<c0202c45>] syscall_call+0x7/0xb -> #0 (&opl3->voice_lock){..-...}: [<c02467e6>] validate_chain+0x1036/0x1040 [<c0246aca>] __lock_acquire+0x2da/0xab0 [<c024731a>] lock_acquire+0x7a/0xa0 [<c044c300>] _spin_lock_irqsave+0x40/0x60 [<cca748fe>] snd_opl3_note_off+0x1e/0xe0 [snd_opl3_synth] [<cca751f0>] snd_opl3_timer_func+0xa0/0xc0 [snd_opl3_synth] [<c022ac46>] run_timer_softirq+0x166/0x1e0 [<c02269e8>] __do_softirq+0x78/0x110 [<c0226ac6>] do_softirq+0x46/0x50 [<c0226e26>] irq_exit+0x36/0x40 [<c0204bd2>] do_IRQ+0x42/0xb0 [<c020328e>] common_interrupt+0x2e/0x40 [<c021092f>] apm_cpu_idle+0x10f/0x290 [<c0201b11>] cpu_idle+0x21/0x40 [<c04443cd>] rest_init+0x4d/0x60 [<c055c835>] start_kernel+0x235/0x280 [<c055c066>] i386_start_kernel+0x66/0x70 other info that might help us debug this: 2 locks held by swapper/0: #0: (&opl3->tlist){+.-...}, at: [<c022abd0>] run_timer_softirq+0xf0/0x1e0 #1: (&opl3->sys_timer_lock){..-...}, at: [<cca75169>] snd_opl3_timer_func+0x19/0xc0 [snd_opl3_synth] stack backtrace: Pid: 0, comm: swapper Not tainted 2.6.32-rc3 #87 Call Trace: [<c0245188>] print_circular_bug+0xc8/0xd0 [<c02467e6>] validate_chain+0x1036/0x1040 [<c0247f14>] ? check_usage_forwards+0x54/0xd0 [<c0246aca>] __lock_acquire+0x2da/0xab0 [<c024731a>] lock_acquire+0x7a/0xa0 [<cca748fe>] ? snd_opl3_note_off+0x1e/0xe0 [snd_opl3_synth] [<c044c300>] _spin_lock_irqsave+0x40/0x60 [<cca748fe>] ? snd_opl3_note_off+0x1e/0xe0 [snd_opl3_synth] [<cca748fe>] snd_opl3_note_off+0x1e/0xe0 [snd_opl3_synth] [<c044c307>] ? _spin_lock_irqsave+0x47/0x60 [<cca751f0>] snd_opl3_timer_func+0xa0/0xc0 [snd_opl3_synth] [<c022ac46>] run_timer_softirq+0x166/0x1e0 [<c022abd0>] ? run_timer_softirq+0xf0/0x1e0 [<cca75150>] ? snd_opl3_timer_func+0x0/0xc0 [snd_opl3_synth] [<c02269e8>] __do_softirq+0x78/0x110 [<c044c0fd>] ? _spin_unlock+0x1d/0x20 [<c025915f>] ? handle_level_irq+0xaf/0xe0 [<c0226ac6>] do_softirq+0x46/0x50 [<c0226e26>] irq_exit+0x36/0x40 [<c0204bd2>] do_IRQ+0x42/0xb0 [<c024463c>] ? trace_hardirqs_on_caller+0x12c/0x180 [<c020328e>] common_interrupt+0x2e/0x40 [<c0208d88>] ? default_idle+0x38/0x50 [<c021092f>] apm_cpu_idle+0x10f/0x290 [<c0201b11>] cpu_idle+0x21/0x40 [<c04443cd>] rest_init+0x4d/0x60 [<c055c835>] start_kernel+0x235/0x280 [<c055c210>] ? unknown_bootoption+0x0/0x210 [<c055c066>] i386_start_kernel+0x66/0x70 Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * | ALSA: ICE1712/24 - Change the Multi Track Peak control (level meters) from ↵Pavel Hofman2009-10-082-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | MIXER to PCM type * PLEASE NOTE - this change requires the corresponding update of envy24control for ice1712 - kind of an ABI change. * The "Multi Track Peak" control is read-only level meters indicator. * The control is VERY confusing to most users since it is currently displayed in regular mixers. E.g. alsamixer ignores its read-only status and allows changing the levels with keys which makes no sense. Signed-off-by: Pavel Hofman <pavel.hofman@ivitera.com> Acked-by: Jaroslav Kysela <perex@perex.cz> Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * | sound: via82xx: move DXS volume controls to PCM interfaceClemens Ladisch2009-10-061-9/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The "VIA DXS" controls are actually volume controls that apply to the four PCM substreams, so we better indicate this connection by moving the controls to the PCM interface. Commit b452e08e73c0e3dbb0be82130217be4b7084299e in 2.6.30 broke the restoring of these volumes by "alsactl restore" that most distributions use; the renaming in this patch cures that regression by preventing alsactl from applying the old, wrong volume levels to the new controls. http://bugzilla.kernel.org/show_bug.cgi?id=14151 http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=532613 Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Cc: <stable@kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* | | Merge branch 'fix/hda' into for-linusTakashi Iwai2009-10-081-22/+67
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| * | ALSA: hda - Fix yet another auto-mic bug in ALC268Takashi Iwai2009-10-071-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Since patch_alc268() doesn't call set_capture_mixer() (due to its h/w design different from other siblings), it needs to call fixup_automic_adc() explicitly to set up the auto-mic routing. Otherwise the indices for int/ext mics aren't set properly. Reference: Novell bnc#544899 http://bugzilla.novell.com/show_bug.cgi?id=544899 Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * | ALSA: hda - Don't pick up invalid HP pins in alc_subsystem_id()Takashi Iwai2009-10-061-3/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | alc_subsystem_id() tries to pick up a headphone pin if not configured, but this caused side-effects as the problem in commit 15870f05e90a365f8022da416e713be0c5024e2f. This patch fixes the driver behavior to pick up invalid HP pins; at least, the pins that are listed as the primary outputs aren't taken any more. Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * | ALSA: hda - Add a workaround for ASUS A7KTakashi Iwai2009-10-061-11/+48
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ASUS A7K needs additional GPIO1 bit setup; it has to be cleared. Added a new fixup hook for this laptop so that it works as is. Refernece: Novell bnc#494309 http://bugzilla.novell.com/show_bug.cgi?id=494309 Signed-off-by: Takashi Iwai <tiwai@suse.de>
| * | ALSA: hda - Fix invalid initializations for ALC861 auto modeTakashi Iwai2009-10-051-7/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The recent auto-parser doesn't work for machines with a single output with ALC861, such as Toshiba laptops, because alc_subsystem_id() sets the hp_pins[0] while it's listed in line_outs[0]. This ends up with the doubled initialization of the same mixer widget, and it mutes the DAC route because hp_pins has no DAC assigned. To fix this problem, just check spec->autocfg.hp_outs and speaker_outs so that they are really detected pins. Reference: Novell bnc#544161 http://bugzilla.novell.com/show_bug.cgi?id=544161 Signed-off-by: Takashi Iwai <tiwai@suse.de>
* | | Merge branch 'upstream/wm8350' into for-2.6.32Mark Brown2009-10-061-2/+2
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| * | | ASoC: WM8350 capture PGA mutes are invertedMark Brown2009-10-061-2/+2
| | | | | | | | | | | | | | | | | | | | Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Cc: stable@kernel.org
* | | | ASoC: Remove absent SYNC and TDM DAI format options from i.MX SSIMark Brown2009-10-061-8/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | These should be handled via set_tdm_slot() now and cause build failures as-is. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* | | | Merge branch 'for-2.6.32' of ↵Mark Brown2009-10-062-3/+4
|\ \ \ \ | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound-2.6 into for-2.6.32
| * | | | ASoC: wm8940: Fix check on error code form snd_soc_codec_set_cache_ioJonathan Cameron2009-10-021-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix for typo in commit 8d50e447d19fec64adebeef55f2b60d695435412 ASoC: Factor out I/O for Wolfson 8 bit data 16 bit register CODECs Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| * | | | ASoC: Fix SND_SOC_DAPM_LINE handlingPeter Ujfalusi2009-10-021-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Since the SND_SOC_DAPM_LINE can be input or output, additional check is needed in order to determine if the widget is connected as input or output. When checking for connected outputs, if the widget is line, than check if the sources list is not empty (line is connected as output) For input endpoint check, when the widget is line, also check if the sinks list is not empty (line is connected as input). Signed-off-by: Peter Ujfalusi <peter.ujfalusi@nokia.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* | | | | Linux 2.6.32-rc3v2.6.32-rc3Linus Torvalds2009-10-051-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I'm skipping -rc2 because the -rc1 Makefile mistakenly said -rc2, so in order to avoid confusion, I'm jumping from -rc1 to -rc3. That way, when 'uname' (or an oops report) says 2.6.32-rc2, there's no confusion about whether people perhaps meant -rc1 or -rc2.
* | | | | headers: remove sched.h from poll.hAlexey Dobriyan2009-10-0526-1/+27
| | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | | | Merge branch 'acpi-pad' of ↵Linus Torvalds2009-10-054-0/+535
|\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 * 'acpi-pad' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: acpi_pad: build only on X86 ACPI: create Processor Aggregator Device driver Fixup trivial conflicts in MAINTAINERS file.
| * | | | | acpi_pad: build only on X86Len Brown2009-09-271-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | X86_FEATURE_MWAIT doesn't exist on ia64... Signed-off-by: Len Brown <len.brown@intel.com>
| * | | | | ACPI: create Processor Aggregator Device driverShaohua Li2009-08-014-0/+535
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ACPI 4.0 created the logical "processor aggregator device" as a mechinism for platforms to ask the OS to force otherwise busy processors to enter (power saving) idle. The intent is to lower power consumption to ride-out transient electrical and thermal emergencies, rather than powering off the server. On platforms that can save more power/performance via P-states, the platform will first exhaust P-states before forcing idle. However, the relative benefit of P-states vs. idle states is platform dependent, and thus this driver need not know or care about it. This driver does not use the kernel's CPU hot-plug mechanism because after the transient emergency is over, the system must be returned to its normal state, and hotplug would permanently break both cpusets and binding. So to force idle, the driver creates a power saving thread. The scheduler will migrate the thread to the preferred CPU. The thread has max priority and has SCHED_RR policy, so it can occupy one CPU. To save power, the thread will invoke the deep C-state entry instructions. To avoid starvation, the thread will sleep 5% of the time time for every second (current RT scheduler has threshold to avoid starvation, but if other CPUs are idle, the CPU can borrow CPU timer from other, which makes the mechanism not work here) Vaidyanathan Srinivasan has proposed scheduler enhancements to allow injecting idle time into the system. This driver doesn't depend on those enhancements, but could cut over to them when they are available. Peter Z. does not favor upstreaming this driver until the those scheduler enhancements are in place. However, we favor upstreaming this driver now because it is useful now, and can be enhanced over time. Signed-off-by: Shaohua Li <shaohua.li@intel.com> NACKed-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com> Signed-off-by: Len Brown <len.brown@intel.com>
* | | | | | Merge branch 'sfi-release' of ↵Linus Torvalds2009-10-051-4/+13
|\ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-sfi-2.6 * 'sfi-release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-sfi-2.6: SFI: remove __init from sfi_verify_table SFI: fix section mismatch warnings in sfi_core.c
| * | | | | | SFI: remove __init from sfi_verify_tableArjan van de Ven2009-10-031-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | sfi_verify_table() is called at runtime, and thus cannot be __init Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
| * | | | | | SFI: fix section mismatch warnings in sfi_core.cRakib Mullick2009-10-031-3/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The function sfi_map_memory/sfi_unmap_memory uses early_ioremap/early_iounmap respectively, which refers to a __init function. And function sfi_check_table also refers to a __init function sfi_verify_table. Since the references are valid, so use __ref to get rid of the warnings. We were warned by the following warnings: LD vmlinux.o MODPOST vmlinux.o WARNING: vmlinux.o(.text+0xb6ba3a): Section mismatch in reference from the function sfi_map_memory() to the function .init.text:early_ioremap() The function sfi_map_memory() references the function __init early_ioremap(). This is often because sfi_map_memory lacks a __init annotation or the annotation of early_ioremap is wrong. WARNING: vmlinux.o(.text+0xb6bab6): Section mismatch in reference from the function sfi_unmap_memory() to the function .init.text:early_iounmap() The function sfi_unmap_memory() references the function __init early_iounmap(). This is often because sfi_unmap_memory lacks a __init annotation or the annotation of early_iounmap is wrong. WARNING: vmlinux.o(.text+0xb6be30): Section mismatch in reference from the function sfi_check_table() to the function .init.text:sfi_verify_table() The function sfi_check_table() references the function __init sfi_verify_table(). This is often because sfi_check_table lacks a __init annotation or the annotation of sfi_verify_table is wrong. Signed-off-by: Rakib Mullick <rakib.mullick@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
* | | | | | | Merge branch 'release' of ↵Linus Torvalds2009-10-046-103/+112
|\ \ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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: ACPI: EC: Don't parse DSDT for EC early init on Compal ACPI: EC: Rewrite DMI checks ACPI: dock: fix "sibiling" typo ACPI: kill overly verbose "throttling states" log messages ACPI: Fix bound checks for copy_from_user in the acpi /proc code ACPI: fix bus scanning memory leaks ACPI: EC: Restart command even if no interrupts from EC sony-laptop: Don't unregister the SPIC driver if it wasn't registered sony-laptop: remove _INI call at init time sony-laptop: SPIC unset IRQF_SHARED, set IRQF_DISABLED sony-laptop: remove device_ctrl and the SPIC mini drivers
| * \ \ \ \ \ \ Merge branch 'misc' into releaseLen Brown2009-10-033-15/+10
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| | * | | | | | | ACPI: dock: fix "sibiling" typoAlex Chiang2009-10-031-8/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Crossword clues as haikus: Snakes from the same brood fighting Jackson on a plane? sibilant siblings I guess Will Shortz's job is still secure. Signed-off-by: Alex Chiang <achiang@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
| | * | | | | | | ACPI: kill overly verbose "throttling states" log messagesRoland Dreier2009-10-031-7/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I was recently lucky enough to get a 64-CPU system. The processors actually have T-states, so my kernel log ends up with 64 lines like: ACPI: Processor [CPU0] (supports xx throttling states) This is pretty useless clutter because - this info is already available after boot from /proc/acpi/processor/CPUnn/throttling - there's also an ACPI_DEBUG_PRINT() in processor_throttling.c that gives the same info on boot for anyone who *really* cares. So just delete the code that prints the throttling states in processor_core.c. Signed-off-by: Roland Dreier <rolandd@cisco.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
| | * | | | | | | ACPI: Fix bound checks for copy_from_user in the acpi /proc codeArjan van de Ven2009-10-031-0/+2
| | |/ / / / / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The ACPI /proc write() code takes an unsigned length argument like any write() function, but then assigned it to a *signed* integer called "len". Only after this is a sanity check for len done to make it not larger than 4. Due to the type change a len < 0 is in principle also possible; this patch adds a check for this. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
| * | | | | | | Merge branch 'bugzilla-14081' into releaseLen Brown2009-10-031-6/+46
| |\ \ \ \ \ \ \
| | * | | | | | | ACPI: EC: Don't parse DSDT for EC early init on CompalAlexey Starikovskiy2009-10-031-0/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Compal DSDT breaks if scanned early, while we need early scan for almost all ASUS machines. Safest workaround seems to be to continue do an early scan for all machines, but this Compal model. http://bugzilla.kernel.org/show_bug.cgi?id=14086 Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Len Brown <len.brown@intel.com>
| | * | | | | | | ACPI: EC: Rewrite DMI checksAlexey Starikovskiy2009-10-031-6/+31
| | |/ / / / / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use dmi_check_system() for DMI matching. Don't use string "Notebook" for matching MSI hardware. http://bugzilla.kernel.org/show_bug.cgi?id=14081 Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Len Brown <len.brown@intel.com>
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| | \ \ \ \ \ \
| *-. \ \ \ \ \ \ Merge branches 'sony-laptop', 'bugzilla-14247' and 'bugzilla-14271' into releaseLen Brown2009-10-02348-13884/+14603
| |\ \ \ \ \ \ \ \
| | | * | | | | | | ACPI: fix bus scanning memory leaksBjorn Helgaas2009-10-021-5/+2
| | | |/ / / / / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Free an acpi_get_object_info() buffer when we're finished. Skip the acpi_get_name() altogether -- it was only used for a printk that was really just for debug anyway. http://bugzilla.kernel.org/show_bug.cgi?id=14271 Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Reported-and-tested-by: Zdenek Kabelac <zdenek.kabelac@gmail.com> Signed-off-by: Len Brown <len.brown@intel.com>
| | * / / / / / / ACPI: EC: Restart command even if no interrupts from ECAlexey Starikovskiy2009-10-021-3/+1
| | |/ / / / / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | EC may forget a command without sending any "reset" interrupt, thus we need to lessen the requirement for transaction restart. Reference: http://bugzilla.kernel.org/show_bug.cgi?id=14247 Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Len Brown <len.brown@intel.com>
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