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2011-08-01dccp ccid-2: prevent cwnd > Sequence WindowSamuel Jero2-15/+41
Add a check to prevent CCID-2 from increasing the cwnd greater than the Sequence Window. When the congestion window becomes bigger than the Sequence Window, CCID-2 will attempt to keep more data in the network than the DCCP Sequence Window code considers possible. This results in the Sequence Window code issuing a Sync, thereby inducing needless overhead. Further, if this occurs at the sender, CCID-2 will never detect the problem because the Acks it receives will indicate no losses. I have seen this cause a drop of 1/3rd in throughput for a connection. Also add code to adjust the Sequence Window to be about 5 times the number of packets in the network (RFC 4340, 7.5.2) and to adjust the Ack Ratio so that the remote Sequence Window will hold about 5 times the number of packets in the network. This allows the congestion window to increase correctly without being limited by the Sequence Window. Signed-off-by: Samuel Jero <sj323707@ohio.edu> Acked-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
2011-08-01dccp ccid-2: use feature-negotiation to report Ack Ratio changesGerrit Renker2-2/+9
This uses the new feature-negotiation framework to signal Ack Ratio changes, as required by RFC 4341, sec. 6.1.2. That raises some problems with CCID-2, which at the moment can not cope gracefully with Ack Ratios > 1. Since these issues are not directly related to feature negotiation, they are marked by a FIXME. Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Signed-off-by: Samuel Jero <sj323707@ohio.edu> Acked-by: Ian McDonald <ian.mcdonald@jandi.co.uk>
2011-08-01dccp: send Confirm options only onceSamuel Jero1-5/+16
If a connection is in the OPEN state, remove feature negotiation Confirm options from the list of options after sending them once; as such options are NOT supposed to be retransmitted and are ONLY supposed to be sent in response to a Change option (RFC 4340 6.2). Signed-off-by: Samuel Jero <sj323707@ohio.edu> Acked-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
2011-08-01dccp: support for exchanging of NN options in established state 2/2Gerrit Renker1-0/+116
This patch adds the receiver side and the (fast-path) activation part for dynamic changes of non-negotiable (NN) parameters in (PART)OPEN state. Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Signed-off-by: Samuel Jero <sj323707@ohio.edu> Acked-by: Ian McDonald <ian.mcdonald@jandi.co.uk>
2011-08-01dccp: support for the exchange of NN options in established state 1/2Gerrit Renker3-0/+67
In contrast to static feature negotiation at the begin of a connection, this patch introduces support for exchange of dynamically changing options. Such an update/exchange is necessary in at least two cases: * CCID-2's Ack Ratio (RFC 4341, 6.1.2) which changes during the connection; * Sequence Window values that, as per RFC 4340, 7.5.2, should be sent "as the connection progresses". Both are non-negotiable (NN) features, which means that no new capabilities are negotiated, but rather that changes in known parameters are brought up-to-date at either end. Thse characteristics are reflected by the implementation: * only NN options can be exchanged after connection setup; * an ack is scheduled directly after activation to speed up the update; * CCIDs may request changes to an NN feature even if a negotiation for that feature is already underway: this is required by CCID-2, where changes in cwnd necessitate Ack Ratio changes, such that the previous Ack Ratio (which is still being negotiated) would cause irrecoverable RTO timeouts (thanks to work by Samuel Jero). Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Signed-off-by: Samuel Jero <sj323707@ohio.edu> Acked-by: Ian McDonald <ian.mcdonald@jandi.co.uk>
2011-07-31Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6Linus Torvalds44-452/+4118
* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6: (46 commits) mfd: Fix mismatch in twl4030 mutex lock-unlock mfd: twl6030-pwm.c needs MODULE_LICENSE mfd: Fix the omap-usb-host clock API usage on usbhs_disable() mfd: Acknowledge WM8994 IRQs before reporting mfd: Acknowlege all WM831x IRQs before we handle them mfd: Avoid two assignments if failures happen in tps65910_i2c_probe regulator: Storing tps65912 error codes in u8 mfd: Don't leak init_data in tps65910_i2c_probe regulator: aat2870: Add AAT2870 regulator driver backlight: Add AAT2870 backlight driver mfd: Add AAT2870 mfd driver mfd: Remove dead code from max8997-irq mfd: Move TPS55910 Kconfig option mfd: Fix missing stmpe kerneldoc mfd: Fix off-by-one value range checking for tps65912_i2c_write mfd: Add devices for WM831x clocking module mfd: Remove comp{1,2}_threshold sysfs entries in tps65911_comparator_remove mfd: Don't ask about the TPS65912 core driver in Kconfig mfd: Fix off by one in WM831x IRQ code mfd: Add tps65921 support from twl-core ...
2011-07-31Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68kLinus Torvalds12-931/+166
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k: m68k/math-emu: Remove unnecessary code m68k/math-emu: Remove commented out old code m68k: Kill warning in setup_arch() when compiling for Sun3 m68k/atari: Prefix GPIO_{IN,OUT} with CODEC_ sparc: iounmap() and *_free_coherent() - Use lookup_resource() m68k/atari: Reserve some ST-RAM early on for device buffer use m68k/amiga: Chip RAM - Use lookup_resource() resources: Add lookup_resource() sparc: _sparc_find_resource() should check for exact matches m68k/amiga: Chip RAM - Offset resource end by CHIP_PHYSADDR m68k/amiga: Chip RAM - Use resource_size() to fix off-by-one error m68k/amiga: Chip RAM - Change chipavail to an atomic_t m68k/amiga: Chip RAM - Always allocate from the start of memory m68k/amiga: Chip RAM - Convert from printk() to pr_*() m68k/amiga: Chip RAM - Use tabs for indentation
2011-07-31NFS: Re-enable compilation of nfs with !CONFIG_NFS_V4 || !CONFIG_NFS_V4_1Trond Myklebust2-2/+2
Fix two recently introduced compile problems: Fix a typo in fs/nfs/pnfs.h Move the pnfs_blksize declaration outside the CONFIG_NFS_V4 section in struct nfs_server. Reported-by: Jens Axboe <jaxboe@fusionio.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-07-31mfd: Fix mismatch in twl4030 mutex lock-unlockSanjeev Premi1-4/+4
A mutex is locked on entry into twl4030_madc_conversion(). Immediate return on some error conditions leaves the mutex locked. This patch ensures that mutex is always unlocked before leaving the function. Signed-off-by: Sanjeev Premi <premi@ti.com> Cc: Keerthy <j-keerthy@ti.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-07-31mfd: twl6030-pwm.c needs MODULE_LICENSERandy Dunlap1-0/+2
twl6030_pwm: module license 'unspecified' taints kernel. Signed-off-by: Randy Dunlap <rdunlap@xenotime.net> Acked-by: Hemanth V <hemanthv@ti.com> Acked-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-07-31mfd: Fix the omap-usb-host clock API usage on usbhs_disable()Keshava Munegowda1-2/+2
usbhs_disable function was invoking clk_enable() instead of clk_disable(), thus only increasing the clock usage counter and preventing this particular clock from being ever turned off. Because of this, the power domain of omap4 the USB Host subsystem would never reach lower power states.This patch calls clk_disable() in usbhs_disable function Signed-off-by: Keshava Munegowda <keshava_mgowda@ti.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-07-31mfd: Acknowledge WM8994 IRQs before reportingMark Brown1-6/+6
This ensures we never have a window where we've handled an interrupt but not told the hardware about it. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-07-31mfd: Acknowlege all WM831x IRQs before we handle themMark Brown1-17/+13
Ensure that we never have a window where we've handled an interrupt (and therefore need to be notified of new events) but haven't yet told the interrupt controller that this is the case (so any new events will be discarded). Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-07-31mfd: Avoid two assignments if failures happen in tps65910_i2c_probeJesper Juhl1-3/+3
In drivers/mfd/tps65910.c:tps65910_i2c_probe() there's potential for a tiny optimization. We assign to init_data->irq and init_data->irq_base long before we need them, and there are two potential exits from the function before they are needed. Moving the assignments below these two potential exits means we completely avoid doing them in these two (failure) cases. Signed-off-by: Jesper Juhl <jj@chaosbits.net> Acked-by: Graeme Gregory <gg@slimlogic.co.uk> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-07-31regulator: Storing tps65912 error codes in u8Dan Carpenter1-1/+1
get_ctrl_reg() returns -EINVAL so the error handling won't work here if reg is a u8. Signed-off-by: Dan Carpenter <error27@gmail.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-07-31mfd: Don't leak init_data in tps65910_i2c_probeJesper Juhl1-1/+5
There are a couple of situations where we leak init_data in drivers/mfd/tps65910.c:tps65910_i2c_probe() - this patch should take care of them. Signed-off-by: Jesper Juhl <jj@chaosbits.net> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-07-31regulator: aat2870: Add AAT2870 regulator driverJin Park3-0/+240
Add regulator driver for AnalogicTech AAT2870. Signed-off-by: Jin Park <jinyoungp@nvidia.com> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-07-31backlight: Add AAT2870 backlight driverJin Park3-0/+254
Add backlight driver for AnalogicTech AAT2870. Signed-off-by: Jin Park <jinyoungp@nvidia.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-07-31mfd: Add AAT2870 mfd driverJin Park4-0/+727
Add mfd core driver for AnalogicTech AAT2870. The AAT2870 is communication through I2C and contains backlight and regulator components. Signed-off-by: Jin Park <jinyoungp@nvidia.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-07-31mfd: Remove dead code from max8997-irqJesper Juhl1-2/+0
We either hit one of the case's or the default in the switch statement in get_i2c(), so the 'return ERR_PTR(-EINVAL);' at the end of the function is just dead code - remove it. Signed-off-by: Jesper Juhl <jj@chaosbits.net> Acked-by: MyungJoo Ham <myungjoo.ham@samsung.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-07-31mfd: Move TPS55910 Kconfig optionLinus Walleij2-10/+10
Having another TPS chip at the end of the Kconfig when all it's relatives are grouped together in their own section seems totally counter-intuitive. Move it, also in the Makefile. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-07-31mfd: Fix missing stmpe kerneldocOm Prakash3-1/+5
Generating kerneldoc for STMPE result in warnings, so fix this by adding missing documentation. Signed-off-by: Om Prakash <omprakash.pal@stericsson.com> Reviewed-by: Rabin Vincent <rabin.vincent@stericsson.com> Reviewed-by: Jonas Aberg <jonas.aberg@stericsson.com> Reviewed-by: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-07-31mfd: Fix off-by-one value range checking for tps65912_i2c_writeAxel Lin1-1/+1
If bytes == (TPS6591X_MAX_REGISTER + 1), we have a buffer overflow when doing memcpy(&msg[1], src, bytes). Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-07-31mfd: Add devices for WM831x clocking moduleMark Brown1-0/+12
With the new generic clk API that should appear at some point we should be able to support the clocking sensibly in Linux. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-07-31mfd: Remove comp{1,2}_threshold sysfs entries in tps65911_comparator_removeAxel Lin1-0/+2
Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-07-31mfd: Don't ask about the TPS65912 core driver in KconfigMark Brown1-1/+1
The user has to select the I2C and SPI drivers individually and they select the core driver for the device so there's no point in presenting the user with an option for the core driver. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-07-31mfd: Fix off by one in WM831x IRQ codeDimitris Papastamos1-0/+5
The GPIO IRQs aren't the first IRQs defined, we need to subtract the base for the GPIOs as well to use them for array indexes. Signed-off-by: Dimitris Papastamos <dp@opensource.wolfsonmicro.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-07-31mfd: Add tps65921 support from twl-coreOleg Drokin1-0/+2
Very similar to TPS65920 List of differences: http://www.ti.com/litv/pdf/swcu066b Signed-off-by: Oleg Drokin <green@linuxhacker.ru> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-07-31mfd: Add WM831x clock control register definitionsMark Brown1-0/+101
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-07-31mfd: Ensure value written by wm831x_set_bits() is within the maskMark Brown1-1/+1
Purely for defensiveness. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-07-31mfd: Implement tps65910 IRQ cleanupMark Brown2-0/+2
The tps65910_irq_exit() cleanup function was generating a warning from sparse due to the lack of a prototype. This wasn't causing GCC warnings as the driver wasn't cleaning up its IRQs on exit at all so there was no use of an unprototyped function. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-07-31mfd: Add tunnelcreek watchdog to lpc_sch devicesAlexander Stein1-1/+48
Tunnel Creek has an additional watchdog core. Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-07-31mfd: Clean-up ab8500 register fileLinus Walleij1-7/+1
This adds a previously undefined test register and removed a number of double-defined accessory detect registers (they are already defined higher up in the file. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-07-31mfd: Update ab8500 subdevice listLinus Walleij1-49/+166
This synchronize the subdevice entries for the AB8500 MFD driver with the latest development of subdrivers for things like battery charging and temperature monitoring. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-07-31mfd: ab8500-core MFD devices marked as initdataRobert Rosengren1-9/+9
Internal MFD device structs are marked as __devinitdata since the kernel will allocate memory for the same when calling mfd_add_devices. Signed-off-by: Robert Rosengren <robert.rosengren@stericsson.com> Reviewed-by: Mattias Wallin <mattias.wallin@stericsson.com> Reviewed-by: Johan Palsson <johan.palsson@stericsson.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-07-31tps65912: add regulator driverMargarita Olaya3-0/+807
The tps65912 consist of 4 DCDCs and 10 LDOs. The output voltages can be configured by the SPI or I2C interface, they are meant to supply power to the main processor and other components. Signed-off-by: Margarita Olaya Cabrera <magi@slimlogic.co.uk> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Liam Girdwood <lrg@ti.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-07-31tps65912: gpio: add gpio driverMargarita Olaya4-0/+164
TPS65912 has five GPIOs that can be configured for different purposes. Signed-off-by: Margarita Olaya Cabrera <magi@slimlogic.co.uk> Acked-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Liam Girdwood <lrg@ti.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-07-31tps65912: irq: add interrupt controllerMargarita Olaya4-1/+243
This module controls the interrupt handling for the tps65912. The interrupt sources can be the following: - GPIO - PWRON signal - PWRHOLD signal - Temperature detection Signed-off-by: Margarita Olaya Cabrera <magi@slimlogic.co.uk> Acked-by: Samuel Ortiz <sameo@linux.intel.com> Acked-by: Liam Girdwood <lrg@ti.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-07-31mfd: tps65912: Add new mfd deviceMargarita Olaya6-0/+792
The tps65912 chip is a power management IC. It contains the following components: - Regulators - GPIO controller The core driver is registered as a platform driver, it provides communication through I2C and SPI interfaces. Signed-off-by: Margarita Olaya Cabrera <magi@slimlogic.co.uk> Acked-by: Samuel Ortiz <sameo@linux.intel.com> Acked-by: Liam Girdwood <lrg@ti.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-07-31mfd: Use kstrtoul_from_user in ab8500Peter Huewe1-30/+11
This patch replaces the code for getting an unsigned long from a userspace buffer by a simple call to kstroul_from_user. This makes it easier to read and less error prone. Signed-off-by: Peter Huewe <peterhuewe@gmx.de> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-07-31mfd: Use kstrtoul_from_user in ab3550Peter Huewe1-30/+11
This patch replaces the code for getting an unsigned long from a userspace buffer by a simple call to kstroul_from_user. This makes it easier to read and less error prone. Signed-off-by: Peter Huewe <peterhuewe@gmx.de> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-07-31mfd: Use generic irq chip for jz4740-adcLars-Peter Clausen2-63/+30
Use the generic irq chip framework for implementing the irq chip for the jz4740-adc driver. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-07-31mfd: Fix error handling if BUG() isn't enabled in WM8994Mark Brown1-2/+2
Even if we would've BUG()ed we should still tidy up after ourselves if that isn't enabled in the kernel config. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-07-31mfd: Fix WM8994 IRQ register cache restore on resumeMark Brown1-5/+11
When the byte swap was factored out into the per-register I/O functions the register restore for the IRQ mask cache (which we use and store in CPU native format for the interrupt handler) was not updated to do a byte swap when it uses the bulk I/O. Fix this by writing the cache out one register at a time. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-07-31mfd: Support multiple active WM831x AUXADC conversionsMark Brown2-79/+188
The WM831x AUXADC hardware can schedule multiple conversions at once, allowing higher performance when more than one source is in use as we can have the hardware start new conversions without having to wait for a register write. Take advantage of this in the interrupt driven case, maintaining a list of callers that are waiting for AUXADC conversions and completing them all simultaneously. The external interface of the AUXADC is not changed so there will be limited use of the feature immediately. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-07-31mfd: Restructure wm8994-core device revision handlingMark Brown1-4/+9
Switch on the device type before revision since anything we do here will be device as well as revision specific. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-07-31mfd: Allocate wm835x irq descs dynamicallySascha Hauer1-6/+12
This allows boards to leave the irq_base field unitialized and prevents them having to reserve irqs in the platform. pdata can be optional for irq support now. Without pdata the driver allocates some free irq range. With pdata and irq_base > 0 the driver allocates exactly the specified irq. Without pdata the irq defaults to IRQF_TRIGGER_LOW. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-07-31mfd: Refactor wm831x AUXADC handling into a separate fileMark Brown3-166/+201
In preparation for some additional work on the wm831x AUXADC code move the support into a separate file. This is a simple code motion patch, there should be no functional changes. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-07-31mfd: Read wm831x AUXADC conversion results before acknowledging interruptMark Brown2-16/+32
Ensure that there's no possibility of loosing an AUXADC interrupt by reading the conversion result in the IRQ handler when using interrupts. Otherwise it's possible that under very heavy load a new conversion could be initiated before the acknowledgement for a previous interrupt has happened. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-07-31mfd: Support dynamic allocation of IRQ range for wm831xMark Brown2-6/+14
Use irq_allocate_desc() to get the IRQ range, which turns into a noop on non-sparse systems. Since all existing users are non-sparse there should be no compatibility issues. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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