idle_cpu() is called on irq entry to guess if we need to call
tick_check_idle(). This way we can catch up with jiffies if the tick
was stopped, stop accounting idle time during the interrupt and
maintain the sched clock if it is unstable.
But if we are going to exit the idle loop to schedule a new task (ie:
if we have a task in the runqueue or a remotely enqueued ttwu to
perform), the idle_cpu() check will return 0 such that we miss the
call to tick_check_idle() for all interrupts happening before we
schedule the new task.
As a result these interrupts and the softirqs coming along may deal
with stale jiffies values, bad sched clock values, and won't substract
their time from the idle time accounting.
Fix this with using is_idle_task() instead that strictly checks that
we are running the idle task, without caring about the fact we are
going to schedule a task soon.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Ingo Molnar <mingo@elte.hu>
Link: http://lkml.kernel.org/r/1327427984-23282-3-git-send-email-fweisbec@gmail.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
ts->inidle is set by tick_nohz_idle_enter() and unset by
tick_nohz_idle_exit(). However these two calls are assumed
to be always paired. This means that by the time we call
tick_nohz_idle_exit(), ts->inidle is supposed to be always
set to 1.
Remove the checks for ts->inidle in tick_nohz_idle_exit().
This simplifies a bit the code and improves its debuggability
(ie: ensure the call is paired with a tick_nohz_idle_enter()
call).
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Reviewed-by: Yong Zhang <yong.zhang0@gmail.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Ingo Molnar <mingo@elte.hu>
Link: http://lkml.kernel.org/r/1327427984-23282-2-git-send-email-fweisbec@gmail.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
There is no reason to call update_ts_time_stat from tick_nohz_start_idle
anymore (after e0e37c20 sched: Eliminate the ts->idle_lastupdate field)
when we updated idle_lastupdate unconditionally.
We haven't set idle_active yet and do not provide last_update_time so
the whole call end up being just 2 wasted branches.
Signed-off-by: Michal Hocko <mhocko@suse.cz>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Link: http://lkml.kernel.org/r/1322755222-6951-1-git-send-email-mhocko@suse.cz
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Platforms with Always Running APIC Timer doesn't use the broadcast timer
but the kernel is leaving the broadcast timer (HPET in this case)
in oneshot mode.
On these platforms, before the switch to oneshot mode, broadcast device is
actually in shutdown mode. Code checks for empty tick_broadcast_mask and
avoids going into the periodic mode.
During switch to oneshot mode, add the same tick_broadcast_mask checks in the
tick_broadcast_switch_to_oneshot() and avoid the broadcast device going into
the oneshot mode.
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: john stultz <johnstul@us.ibm.com>
Cc: venki@google.com
Link: http://lkml.kernel.org/r/1320452301.15071.16.camel@sbsiddha-desk.sc.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
but commonly built configs which for some reason manage to survive for
an awfully long time in -next without any reports.
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator
One small bug fix from Axel plus a fix for a build failure in unrealistic
but commonly built configs which for some reason manage to survive for
an awfully long time in -next without any reports.
* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
regulator: Fix getting voltage in max8649_enable_time()
regulator: Fix mc13xxx regulator modular build (again)
Quoth BenH:
"Here are a few powerpc fixes for 3.3, all pretty trivial. I also
added the patch to define GET_IP/SET_IP so we can use some more
asm-generic goodness."
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
powerpc/pseries/eeh: Fix crash when error happens during device probe
powerpc/pseries: Fix partition migration hang in stop_topology_update
powerpc/powernv: Disable interrupts while taking phb->lock
powerpc: Fix WARN_ON in decrementer_check_overflow
powerpc/wsp: Fix IRQ affinity setting
powerpc: Implement GET_IP/SET_IP
powerpc/wsp: Permanently enable PCI class code workaround
* The most visible fix here is against a regression introduced in 3.3-rc1
that ran cards in Ultra High Speed mode even when they failed to initialize
in that mode, leading to lower-speed cards failing to mount.
* A lockdep warning introduced in 3.3-rc1 is fixed.
* Various other small driver fixes, most notably for a NULL dereference
when using highmem with dw_mmc.
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Merge tag 'mmc-fixes-for-3.3-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc
MMC fixes for 3.3-rc4:
* The most visible fix here is against a regression introduced in 3.3-rc1
that ran cards in Ultra High Speed mode even when they failed to initialize
in that mode, leading to lower-speed cards failing to mount.
* A lockdep warning introduced in 3.3-rc1 is fixed.
* Various other small driver fixes, most notably for a NULL dereference
when using highmem with dw_mmc.
* tag 'mmc-fixes-for-3.3-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc:
mmc: dw_mmc: Fix PIO mode with support of highmem
mmc: atmel-mci: save and restore sdioirq when soft reset is performed
mmc: block: Init ro_lock sysfs attr to fix lockdep warnings
mmc: sh_mmcif: fix late delayed work initialisation
mmc: tmio_mmc: fix card eject during IO with DMA
mmc: core: Fix comparison issue in mmc_compare_ext_csds
mmc: core: Fix PowerOff Notify suspend/resume
mmc: sdhci-pci: set Medfield SDIO as non-removable
mmc: core: add the capability for broken voltage
mmc: core: Fix low speed mmc card detection failure
mmc: esdhc: set the timeout to the max value
mmc: esdhc: add PIO mode support
mmc: core: Ensure clocks are always enabled before host interaction
mmc: of_mmc_spi: fix little endian support
mmc: core: UHS sdio card that fails should not exceed 50MHz
mmc: esdhc: fix errors when booting kernel on Freescale eSDHC version 2.3
by the xen-pci[front|back] to conform to the one used in majority of
PCI drivers; Two fixes to make the code more resilient to invalid
configurations.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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Merge tag 'stable/for-linus-fixes-3.3-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen
Two fixes for VCPU offlining; One to fix the string format exposed
by the xen-pci[front|back] to conform to the one used in majority of
PCI drivers; Two fixes to make the code more resilient to invalid
configurations.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* tag 'stable/for-linus-fixes-3.3-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
xenbus_dev: add missing error check to watch handling
xen/pci[front|back]: Use %d instead of %1x for displaying PCI devfn.
xen pvhvm: do not remap pirqs onto evtchns if !xen_have_vector_callback
xen/smp: Fix CPU online/offline bug triggering a BUG: scheduling while atomic.
xen/bootup: During bootup suppress XENBUS: Unable to read cpu state
Basically all small fixes suited as rc4: a few HD-audio regression fixes,
a stable fix for an old Dell laptop with intel8x0, and a simple fix for
ASoC fsi.
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Merge tag 'sound-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
sound fixes for 3.3-rc4
Basically all small fixes suited as rc4: a few HD-audio regression fixes,
a stable fix for an old Dell laptop with intel8x0, and a simple fix for
ASoC fsi.
* tag 'sound-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: intel8x0: Fix default inaudible sound on Gateway M520
ALSA: hda - Fix silent speaker output on Acer Aspire 6935
ALSA: hda - Fix initialization of secondary capture source on VT1705
ASoC: fsi: fixup fsi_pointer() calculation method
ALSA: hda - Fix mute-LED VREF value for new HP laptops
BugLink: https://bugs.launchpad.net/bugs/930842
The reporter states that audio is inaudible by default without muting
'External Amplifier'. Add a quirk to handle his SSID so that changing
the control is not necessary.
Reported-and-tested-by: Benjamin Carlson <elderbubba0810@gmail.com>
Cc: <stable@kernel.org>
Signed-off-by: Daniel T Chen <crimsun@ubuntu.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
driver.
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Merge tag 'asoc-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus
A simple fix from Morimoto-san for the pointer() operation in the FSI
driver.
* git://git.samba.org/sfrench/cifs-2.6:
cifs: don't return error from standard_receive3 after marking response malformed
cifs: request oplock when doing open on lookup
cifs: fix error handling when cifscreds key payload is an error
This updates the sha512 fix so that it doesn't cause excessive stack
usage on i386. This is done by reverting to the original code, and
avoiding the W duplication by moving its initialisation into the loop.
As the underlying code is in fact the one that we have used for years,
I'm pushing this now instead of postponing to the next cycle.
* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
crypto: sha512 - Avoid stack bloat on i386
crypto: sha512 - Use binary and instead of modulus
EEH may happen during a PCI driver probe. If the driver is trying to
access some register in a loop, the EEH code will try to print the
driver name. But the driver pointer in struct pci_dev is not set until
probe returns successfully.
Use a function to test if the device and the driver pointer is NULL
before accessing the driver's name.
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
We need to disable interrupts when taking the phb->lock. Otherwise
we could deadlock with pci_lock taken from an interrupt.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
We use __get_cpu_var() which triggers a false positive warning
in smp_processor_id() thinking interrupts are enabled (at this
point, they are soft-enabled but hard-disabled).
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
We call the cache_hwirq_map() function with a linux IRQ number
but it expects a HW irq number. This triggers a BUG on multic-chip
setups in addition to not doing the right thing.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
With this change, helpers such as instruction_pointer() et al, get defined
in the generic header in terms of GET_IP
Removed the unnecessary definition of profile_pc in !CONFIG_SMP case as
suggested by Mike Frysinger.
Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
It appears that on the Chroma card, the class code of the root
complex is still wrong even on DD2 or later chips. This could
be a firmware issue, but that breaks resource allocation so let's
unconditionally fix it up.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Sometimes a software reset is needed. Then some registers are saved and
restored but the interrupt mask register is missing. It causes issues
with sdio devices whose interrupts are masked after reset.
Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
If the driver is loaded with a card in the slot, mmc_add_host() will
schedule an immediate card-detection work, which will start IO and wait
for command completion. Usually the kernel first returns to the sh_mmcif
probe function, lets it finish and only then schedules the rescan work.
But sometimes, expecially under heavy system load, the work will be
scheduled immediately before returning to the probe method. In this case
it is important for the driver to be fully prepared for IO. For sh_mmcif
this means, that also the timeout work has to be initialised before
calling mmc_add_host(). It is also better to prepare interrupts
beforehand. Besides, since mmc_add_host() does card-detection itself,
there is no need to do it again immediately afterwards.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
When DMA is in use and the card is ejected during IO, DMA transfers have to
be terminated, otherwise the dmaengine driver fails to operate properly,
when the card is re-inserted.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
Found this issue during code review. Actually, there are two issues which
both compensate together in lucky case. In unlucky case the bus width
probing might not work as expected.
Signed-off-by: Jurgen Heeks <jurgen.heeks@nokia.com>
Reviewed-by: Namjae Jeon <linkinjeon@gmail.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Modified the mmc_poweroff to resume before sending the poweroff
notification command. In sleep mode only AWAKE and RESET commands are
allowed, so before sending the poweroff notification command resume from
sleep mode and then send the notification command.
PowerOff Notify is tested on a Synopsis Designware Host Controller
(eMMC 4.5). The suspend to RAM and resume works fine.
Signed-off-by: Girish K S <girish.shivananjappa@linaro.org>
Tested-by: Girish K S <girish.shivananjappa@linaro.org>
Reviewed-by: Saugata Das <saugata.das@linaro.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
Set Medfield SDIO as non-removable to avoid un-necessary
card detect activity.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
There is an understood mismatch between the voltage the host controller is
set to and the voltage supplied to the card by a fixed voltage regulator.
Teaching the driver to accept the mismatch is overly complicated. Instead
just accept the regulator's voltage.
This patch adds MMC_CAP2_BROKEN_VOLTAGE.
If the voltage didn't satisfy between min_uV and max_uV, try to change
the voltage in core.c. When changing the voltage, maybe use
regulator_set_voltage().
In regulator_set_voltage(), check the below condition.
/* sanity check */
if (!rdev->desc->ops->set_voltage &&
!rdev->desc->ops->set_voltage_sel) {
ret = -EINVAL;
goto out;
}
If some board should use the fixed-regulator, always return -EINVAL.
Then, eMMC didn't initialize always.
So if use a fixed-regulator, we need to add the MMC_CAP2_BROKEN_VOLTAGE.
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
This patch fixes the failure of low speed mmc card detection.
Signed-off-by: Girish K S <girish.shivananjappa@linaro.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
When accessing the card on some FSL platform boards (e.g p2020, p1010,
mpc8536), the following error is reported with the timeout value calculated:
mmc0: Got data interrupt 0x00000020 even though no data operation was
in progress.
mmc0: Got data interrupt 0x00000020 even though no data operation was
in progress.
So we skip the calculation of timeout and use the max value to fix it.
Signed-off-by: Jerry Huang <Chang-Ming.Huang@freescale.com>
Signed-off-by: Gao Guanhua <B22826@freescale.com>
Signed-off-by: Xie Xiaobo <X.Xie@freescale.com>
Acked-by: Anton Vorontsov <cbouatmailru@gmail.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
For some FSL ESDHC controllers (e.g. P2020E, Rev1.0), the SDHC can not
work on DMA mode because of the hardware bug, so we set a broken dma flag
and use PIO mode.
Signed-off-by: Jerry Huang <Chang-Ming.Huang@freescale.com>
Signed-off-by: Gao Guanhua <B22826@freescale.com>
Acked-by: Anton Vorontsov <cbouatmailru@gmail.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Ensure clocks are always enabled before any interaction with the
host controller driver. This makes sure that there is no race
between host execution and the core layer turning off clocks
in different context with clock gating framework.
Signed-off-by: Sujit Reddy Thumma <sthumma@codeaurora.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Per Forlin <per.forlin@stericsson.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
The voltage_ranges is supposed to switch from big endian to little endian.
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Chris Ball <cjb@laptop.org>
A UHS sdio card that fails initialization at 1.8v signaling is not in
UHS mode. We cannot use the speed in the the cis to reflect the bus
speed as this is the maxiumum value and will not reflect the fact
that the host is operating at a lower (non uhs) bus speed.
Signed-off-by: Philip Rakity <prakity@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Reviewed-by: Aaron Lu <aaron.lu@amd.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Handling of isapnp module aliases was broken by commit
626596e295 by changing "isapnp" string to "isa".
The code was then modified by commit
e49ce14150 but this bug remained.
Change the string back to "isapnp".
Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Allow bint param accept nul values, just do same as bool param.
Signed-off-by: Dave Young <dyoung@redhat.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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Merge tag 'battery-fixes-for-v3.3-rc2' of git://git.infradead.org/users/cbou/battery-urgent
Just a few small fixes for a bunch of drivers. Nothing noteworthy.
* tag 'battery-fixes-for-v3.3-rc2' of git://git.infradead.org/users/cbou/battery-urgent:
lp8727_charger: Add terminating entry for i2c_device_id table
power_supply: Fix modalias for charger-manager
lp8727_chager: Fix permissions on a header file
bq27x00_battery: Fix flag register read
Revert "bq27x00_battery: Fix reporting status value for bq27500 battery"
Two bugfixes in XFS for 3.3: one fix passes KMEM_SLEEP to kmem_realloc
instead of 0, and the other resolves a possible deadlock in xfs quotas.
* 'for-linus' of git://oss.sgi.com/xfs/xfs:
xfs: use a normal shrinker for the dquot freelist
xfs: pass KM_SLEEP flag to kmem_realloc() in xlog_recover_add_to_cnt_trans()
This set of changes are fixing various section mismatch warnings which
look to be completely valid. Primerily, those which are fixed are those
which can cause oopses by manipulation of driver binding via sysfs. For
example: calling code marked __init from driver probe __devinit
functions.
Some of these changes will be reworked at the next merge window when the
underlying reasons are sorted out. In the mean time, I think it's
important to have this fixed for correctness.
Also included in this set are fixes to various error messages in OMAP -
including making them gramatically correct, fixing a few spelling
errors, and more importantly, making them greppable by unwrapping them.
Tony Lindgren has acked all these patches, put them out for testing a
week ago, and I've tested them on the platforms I have.
* 'omap-fixes-warnings' of git://git.linaro.org/people/rmk/linux-arm:
ARM: omap: resolve nebulous 'Error setting wl12xx data'
ARM: omap: fix wrapped error messages in omap_hwmod.c
ARM: omap: fix section mismatch warnings in mux.c caused by hsmmc.c
ARM: omap: fix section mismatch warning for sdp3430_twl_gpio_setup()
ARM: omap: fix section mismatch error for omap_4430sdp_display_init()
ARM: omap: fix section mismatch warning for omap_secondary_startup()
ARM: omap: preemptively fix section mismatch in omap4_sdp4430_wifi_mux_init()
ARM: omap: fix section mismatch warning in mux.c
ARM: omap: fix section mismatch errors in TWL PMIC driver
ARM: omap: fix uninformative vc/i2c configuration error message
ARM: omap: fix vc.c PMIC error message
ARM: omap: fix prm44xx.c OMAP44XX_IRQ_PRCM build error
This pull request covers the major oopsing issues with OMAP, caused by
the lack of the TWL driver. Even when the TWL driver is not built in,
we shouldn't oops.
* 'omap-fixes-urgent' of git://git.linaro.org/people/rmk/linux-arm:
ARM: omap: fix broken twl-core dependencies and ifdefs
ARM: omap: fix oops in drivers/video/omap2/dss/dpi.c
ARM: omap: fix oops in arch/arm/mach-omap2/vp.c when pmic is not found
Some code - especially the crypto layer - wants to use the x86
FP/MMX/AVX register set in what may be interrupt (typically softirq)
context.
That *can* be ok, but the tests for when it was ok were somewhat
suspect. We cannot touch the thread-specific status bits either, so
we'd better check that we're not going to try to save FP state or
anything like that.
Now, it may be that the TS bit is always cleared *before* we set the
USEDFPU bit (and only set when we had already cleared the USEDFP
before), so the TS bit test may actually have been sufficient, but it
certainly was not obviously so.
So this explicitly verifies that we will not touch the TS_USEDFPU bit,
and adds a few related sanity-checks. Because it seems that somehow
AES-NI is corrupting user FP state. The cause is not clear, and this
patch doesn't fix it, but while debugging it I really wanted the code to
be more obviously correct and robust.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
It was marked asmlinkage for some really old and stale legacy reasons.
Fix that and the equally stale comment.
Noticed when debugging the irq_fpu_usable() bugs.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Conflicts:
sound/pci/hda/patch_realtek.c
Merged back the fix for Acer Aspire 6935 with ALC889 codec.
The fix commit was based on 3.2 kernel so that it can be applied to
stable kernel cleanly.
Since 3.2 kernel, the driver starts trying to assign the multi-io DACs
before the speaker, thus it assigns DAC2/3 for multi-io and DAC4 for
the speaker for a standard laptop setup like a HP, a speaker, a mic-in
and a line-in. However, on Acer Aspire 6935, it seems that the
speaker pin 0x14 must be connected with either DAC1 or 2; otherwise it
results in silence by some reason, although the codec itself allows
the routing to DAC3/4.
As a workaround, the connection list of each pin is reduced to be
mapped to either only DAC1/2 or DAC3/4, so that the compatible
assignment as in kernel 3.1 is achieved.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=42740
Cc: <stable@kernel.org> [v3.2+]
Signed-off-by: Takashi Iwai <tiwai@suse.de>
