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2014-04-16dma: fix eDMA driver as a subsys_initcallYuan Yao1-1/+11
Because of some driver base on DMA, changed the initcall order as subsys_initcall. Signed-off-by: Yuan Yao <yao.yuan@freescale.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-04-16dmaengine: sirf: off by one in of_dma_sirfsoc_xlate()Dan Carpenter1-1/+1
The ">" here should be ">=" or we are one step beyond the end of the sdma->channels[] array. Fixes: 2e041c94628c ('dmaengine: sirf: enable generic dt binding for dma channels') Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Barry Song <Baohua.Song@csr.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-04-16platform: Fix timberdale dependenciesJean Delvare1-1/+1
VIDEO_TIMBERDALE selects TIMB_DMA which itself depends on MFD_TIMBERDALE, so VIDEO_TIMBERDALE should either select or depend on MFD_TIMBERDALE as well. I chose to make it depend on it because I think it makes more sense and it is consistent with what other options are doing. Adding a "|| HAS_IOMEM" to the TIMB_DMA dependencies silenced the kconfig warning about unmet direct dependencies but it was wrong: without MFD_TIMBERDALE, TIMB_DMA is useless as the driver has no device to bind to. Signed-off-by: Jean Delvare <jdelvare@suse.de> Cc: Vinod Koul <vinod.koul@intel.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Mauro Carvalho Chehab <m.chehab@samsung.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-04-14dma: edma: fix incorrect SG list handlingSekhar Nori1-2/+4
The code to handle any length SG lists calls edma_resume() even before edma_start() is called. This is incorrect because edma_resume() enables edma events on the channel after which CPU (in edma_start) cannot clear posted events by writing to ECR (per the EDMA user's guide). Because of this EDMA transfers fail to start if due to some reason there is a pending EDMA event registered even before EDMA transfers are started. This can happen if an EDMA event is a byproduct of device initialization. Fix this by calling edma_resume() only if it is not the first batch of MAX_NR_SG elements. Without this patch, MMC/SD fails to function on DA850 EVM with DMA. The behaviour is triggered by specific IP and this can explain why the issue was not reported before (example with MMC/SD on AM335x). Tested on DA850 EVM and AM335x EVM-SK using MMC/SD card. Cc: stable@vger.kernel.org # v3.12.x+ Cc: Joel Fernandes <joelf@ti.com> Acked-by: Joel Fernandes <joelf@ti.com> Tested-by: Jon Ringle <jringle@gridpoint.com> Tested-by: Alexander Holler <holler@ahsoftware.de> Reported-by: Jon Ringle <jringle@gridpoint.com> Signed-off-by: Sekhar Nori <nsekhar@ti.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-04-10Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dmaLinus Torvalds27-58/+2630
Pull slave-dmaengine updates from Vinod Koul: - New driver for Qcom bam dma - New driver for RCAR peri-peri - New driver for FSL eDMA - Various odd fixes and updates thru the subsystem * 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma: (29 commits) dmaengine: add Qualcomm BAM dma driver shdma: add R-Car Audio DMAC peri peri driver dmaengine: sirf: enable generic dt binding for dma channels dma: omap-dma: Implement device_slave_caps callback dmaengine: qcom_bam_dma: Add device tree binding dma: dw: Add suspend and resume handling for PCI mode DW_DMAC. dma: dw: allocate memory in two stages in probe Add new line to test result strings produced in verbose mode dmaengine: pch_dma: use tasklet_kill in teardown dmaengine: at_hdmac: use tasklet_kill in teardown dma: cppi41: start tear down only if channel is busy usb: musb: musb_cppi41: Dont reprogram DMA if tear down is initiated dmaengine: s3c24xx-dma: make phy->irq signed for error handling dma: imx-dma: Add missing module owner field dma: imx-dma: Replace printk with dev_* dma: fsl-edma: fix static checker warning of NULL dereference dma: Remove comment about embedding dma_slave_config into custom structs dma: mmp_tdma: move to generic device tree binding dma: mmp_pdma: add IRQF_SHARED when request irq dma: edma: Fix memory leak in edma_prep_dma_cyclic() ...
2014-04-05Merge branch 'topic/bam' into for-linusVinod Koul3-0/+1121
Conflicts: drivers/dma/Makefile Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-04-05dmaengine: add Qualcomm BAM dma driverAndy Gross3-0/+1122
Add the DMA engine driver for the QCOM Bus Access Manager (BAM) DMA controller found in the MSM 8x74 platforms. Each BAM DMA device is associated with a specific on-chip peripheral. Each channel provides a uni-directional data transfer engine that is capable of transferring data between the peripheral and system memory (System mode), or between two peripherals (BAM2BAM). The initial release of this driver only supports slave transfers between peripherals and system memory. Signed-off-by: Andy Gross <agross@codeaurora.org> Tested-by: Stanimir Varbanov <svarbanov@mm-sol.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-04-04Merge branch 'devel-stable' into for-nextRussell King8-26/+71
2014-04-04dmaengine: omap-dma: more consolidation of CCR register setupRussell King1-28/+18
We can move the handling of the DMA synchronisation control out of the prepare functions; this can be pre-calculated when the DMA channel has been allocated, so we don't need to duplicate this in both prepare functions. Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014-04-04dmaengine: omap-dma: move IRQ handling to omap-dmaRussell King1-6/+115
Move the interrupt handling for OMAP2+ into omap-dma, rather than using the legacy support in the platform code. Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014-04-04dmaengine: omap-dma: move register read/writes into omap-dma.cRussell King1-9/+87
Export the DMA register information from the SoC specific data, such that we can access the registers directly in omap-dma.c, mapping the register region ourselves as well. Rather than calculating the DMA channel register in its entirety for each access, we pre-calculate an offset base address for the allocated DMA channel and then just use the appropriate register offset. Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014-04-04dmaengine: omap-dma: cleanup errata 3.3 handlingRussell King1-23/+29
Provide a function to read the CSAC/CDAC register, working around the OMAP 3.2/3.3 erratum (which requires two reads of the register if the first returned zero. Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014-04-04dmaengine: omap-dma: provide register read/write functionsRussell King1-41/+61
Provide a pair of channel register accessors, and a pair of global accessors for non-channel specific registers. Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014-04-04dmaengine: omap-dma: use cached CCR value when enabling DMARussell King1-4/+2
We don't need to read-modify-write the CCR register; we already know what value it should contain at this point. Use the cached CCR value when setting the enable bit. Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014-04-04dmaengine: omap-dma: move barrier to omap_dma_start_desc()Russell King1-1/+7
We don't need to issue a barrier for every segment of a DMA transfer; doing this just once per descriptor will do. Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014-04-04dmaengine: omap-dma: move clnk_ctrl setting to preparation functionsRussell King1-14/+9
Move the clnk_ctrl setup to the preparation functions, saving its value in the omap_desc. This only needs to be set once per descriptor, not for each segment, so set it in omap_dma_start_desc() rather than omap_dma_start(). Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014-04-04dmaengine: omap-dma: improve efficiency loading C.SA/C.EI/C.FI registersRussell King1-12/+20
The only thing which changes is which registers are written, so put this in local variables instead. This results in smaller code. Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014-04-04dmaengine: omap-dma: consolidate clearing channel status registerRussell King1-10/+10
Consolidate clearing of the channel status register, rather than open coding the same functionality in two places. Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014-04-04dmaengine: omap-dma: move CCR buffering disable errata out of the fast pathRussell King1-2/+5
Since we record the CCR register in the dma transaction, we can move the processing of the iframe buffering errata out of the omap_dma_start(). Move it to the preparation functions. Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014-04-04dmaengine: omap-dma: provide register definitionsRussell King1-54/+117
Provide our own set of more complete register definitions; this allows us to get rid of the meaningless 1 << n constants scattered throughout this code. Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014-04-04dmaengine: omap-dma: consolidate setup of CCRRussell King1-86/+61
Consolidate the setup of the channel control register. Prepare the basic value in the preparation of the DMA descriptor, and write it into the register upon descriptor execution. Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014-04-04dmaengine: omap-dma: consolidate setup of CSDPRussell King1-36/+28
Consolidate the setup of the channel source destination parameters register. This way, we calculate the required CSDP value when we setup a transfer descriptor, and only write it to the device registers once when we start the descriptor. Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014-04-04dmaengine: omap-dma: move reading of dma position to omap-dma.cRussell King1-2/+64
Read the current DMA position from the hardware directly rather than via arch/arm/plat-omap/dma.c. Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014-04-04dmaengine: omap-dma: control start/stop directlyRussell King1-10/+141
Program the non-cyclic mode DMA start/stop directly, rather than via arch/arm/plat-omap/dma.c. Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014-04-04dmaengine: omap-dma: consolidate writes to DMA registersRussell King1-75/+48
There's no need to keep writing registers which don't change value in omap_dma_start_sg(). Move this into omap_dma_start_desc() and merge the register updates together. Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014-04-04dmaengine: omap-dma: program hardware directlyRussell King1-16/+126
Program the transfer parameters directly into the hardware, rather than using the functions in arch/arm/plat-omap/dma.c. Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014-04-04dmaengine: omap-dma: provide a hook to get the underlying DMA platform opsRussell King1-0/+7
Provide and use a hook to obtain the underlying DMA platform operations so that omap-dma.c can access the hardware more directly without involving the legacy DMA driver. Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014-04-04dmaengine: omap-dma: use devm_kzalloc() to allocate omap_dmadev.Russell King1-2/+1
Use devm_kzalloc() to allocate omap_dmadev() so that we don't need complex error cleanup paths. Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014-03-29shdma: add R-Car Audio DMAC peri peri driverKuninori Morimoto3-0/+327
Add support Audio DMAC peri peri driver for Renesas R-Car Gen2 SoC, using 'shdma-base' DMA driver framework. Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> [fixed checkpatch error] Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-03-29dmaengine: sirf: enable generic dt binding for dma channelsBarry Song1-0/+23
move to support of_dma_request_slave_channel() and dma_request_slave_channel. we add a xlate() to let dma clients be able to find right dma_chan by generic "dmas" properties in dts. Cc: Mark Rutland <mark.rutland@arm.com> Cc: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Barry Song <Baohua.Song@csr.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-03-29dma: omap-dma: Implement device_slave_caps callbackPeter Ujfalusi1-0/+18
With the callback implemented omap-dma can provide information to client drivers regarding to supported address widths, directions, residue granularity, etc. Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com> Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-03-26dma: dw: Add suspend and resume handling for PCI mode DW_DMAC.Chew, Chiau Ee1-0/+33
This is to disable/enable DW_DMAC hw during late suspend/early resume. Since DMA is providing service to other clients (eg: SPI, HSUART), we need to ensure DMA suspends after the clients and resume before the clients are active. Signed-off-by: Chew, Chiau Ee <chiau.ee.chew@intel.com> Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-03-26dma: dw: allocate memory in two stages in probeAndy Shevchenko2-9/+12
This makes the probe() function a little bit clearer. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-03-26Add new line to test result strings produced in verbose modeJerome Blin1-2/+2
Prevents test result strings from being output on same line. Issue will happen with verbose and multi-iteration modes enabled. Signed-off-by: Jerome Blin <jerome.blin@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-03-17Merge branch 'topic/tasklet_fix' into for-linusVinod Koul2-3/+2
2014-03-17dmaengine: pch_dma: use tasklet_kill in teardownVinod Koul1-2/+2
As discussed in [1] the tasklet_disable is not a proper function for teardown. We need to ensure irq is disabled, followed by ensuring that don't schedule any more tasklets and then its safe to use tasklet_kill(). Here in pch dma driver we need to use free_irq() before tasklet_kill(). So move up the free_irq() which will ensure that the irq is disabled and also wait till all scheduled interrupts are executed by invoking synchronize_irq(). [1]: http://lwn.net/Articles/588457/ Reported-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-03-17dmaengine: at_hdmac: use tasklet_kill in teardownVinod Koul1-1/+0
As discussed in [1] the tasklet_disable is not a proper function for teardown. We need to ensure irq is disabled, followed by ensuring that don't schedule any more tasklets and then its safe to use tasklet_kill(). Here in at_hdmac driver we use free_irq() before tasklet_kill(). The free_irq() will ensure that the irq is disabled and also wait till all scheduled interrupts are executed by invoking synchronize_irq(). So we need to only do tasklet_kill() after invoking free_irq() [1]: http://lwn.net/Articles/588457/ Reported-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-03-11dma: cppi41: start tear down only if channel is busyGeorge Cherian1-2/+5
Start the channel tear down only if the channel is busy, else just bail out. In some cases its seen that by the time the tear down is initiated the cppi completes the DMA, especially in ISOCH transfers. Signed-off-by: George Cherian <george.cherian@ti.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-03-11dmaengine: s3c24xx-dma: make phy->irq signed for error handlingDan Carpenter1-1/+1
There is a bug in s3c24xx_dma_probe() where we do: phy->irq = platform_get_irq(pdev, i); if (phy->irq < 0) { The problem is that "phy->irq" is unsigned so the error handling doesn't work. I have changed it to signed. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-03-06dma: imx-dma: Add missing module owner fieldAlexander Shiyan1-0/+1
Signed-off-by: Alexander Shiyan <shc_work@mail.ru> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-03-06dma: imx-dma: Replace printk with dev_*Alexander Shiyan1-6/+6
Use the dev_* message logging API instead of raw printk. Signed-off-by: Alexander Shiyan <shc_work@mail.ru> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-03-06dma: fsl-edma: fix static checker warning of NULL dereferenceJingchang Lu1-2/+2
The static checker reports following warning: drivers/dma/fsl-edma.c:732 fsl_edma_xlate() error: we previously assumed 'chan' could be null (see line 737) The changes of the loop cursor in the iteration may result in NULL dereference when dma_get_slave_channel failed but loop will continue. So use list_for_each_entry_safe() instead of list_for_each_entry() to against this. Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Jingchang Lu <b35083@freescale.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-03-06dma: mmp_tdma: move to generic device tree bindingNenghua Cao1-0/+50
This patch makes the mmp_tdma controller able to provide DMA resources in DT environments by providing an dma xlate function to get the generic DMA device tree helper support. Then DMA clients only need to call dma_request_slave_channel() for requesting a DMA channel from dmaengine. Signed-off-by: Nenghua Cao <nhcao@marvell.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-03-06dma: mmp_pdma: add IRQF_SHARED when request irqChao Xie1-4/+4
For some SOCes use mmp_pdma, they have several dma controllers sharing same irq. So add IRQF_SHARED to flag when request irq. It can make multiple controllers share the same irq. Signed-off-by: Chao Xie <chao.xie@marvell.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-03-06dma: edma: Fix memory leak in edma_prep_dma_cyclic()Christian Engelmayer1-1/+4
Fix a memory leak in the edma_prep_dma_cyclic() error handling path. Signed-off-by: Christian Engelmayer <cengelma@gmx.at> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-03-06DMA: shdma: Make sh_dmae_pm staticLaurent Pinchart1-1/+1
The structure isn't used outside of its compilation unit. Make it static. Cc: Guennadi Liakhovetski <g.liakhovetski+renesas@gmail.com> Cc: Vinod Koul <vinod.koul@intel.com> Cc: dmaengine@vger.kernel.org Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-03-06DMA: shdma: Fix warnings due to declared but unused symbolsLaurent Pinchart1-3/+8
Several functions and variables are use on SH_CPU4 or ARM only. Guard their declaration with conditional compilation directives to avoid warnings. Cc: Guennadi Liakhovetski <g.liakhovetski+renesas@gmail.com> Cc: Vinod Koul <vinod.koul@intel.com> Cc: dmaengine@vger.kernel.org Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-03-06DMA: shdma: Fix warnings due to improper casts and printk formatsLaurent Pinchart3-8/+9
Use the %zu and %pad printk specifiers to print size_t and dma_addr_t variables, and cast pointers to uintptr_t instead of unsigned int where applicable. This fixes warnings on platforms where pointers and/or dma_addr_t have a different size than int Cc: Guennadi Liakhovetski <g.liakhovetski+renesas@gmail.com> Cc: Vinod Koul <vinod.koul@intel.com> Cc: dmaengine@vger.kernel.org Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-03-02Merge branch 'fixes' of git://git.infradead.org/users/vkoul/slave-dmaLinus Torvalds2-1/+4
Pull slave-dma fixes from Vinod Koul: "This request brings you two small fixes. First one for fixing dereference of freed descriptor and second for fixing sdma bindings for it to work for imx25. I was planning to send this about 10days ago but then I had to proceed on my paternity leave and didnt get chance to send this. Now got a bit of time from dady duties :)" * 'fixes' of git://git.infradead.org/users/vkoul/slave-dma: dma: sdma: Add imx25 compatible dma: ste_dma40: don't dereference free:d descriptor
2014-02-25ioat: fix tasklet tear downDan Williams4-13/+54
Since commit 77873803363c "net_dma: mark broken" we no longer pin dma engines active for the network-receive-offload use case. As a result the ->free_chan_resources() that occurs after the driver self test no longer has a NET_DMA induced ->alloc_chan_resources() to back it up. A late firing irq can lead to ksoftirqd spinning indefinitely due to the tasklet_disable() performed by ->free_chan_resources(). Only ->alloc_chan_resources() can clear this condition in affected kernels. This problem has been present since commit 3e037454bcfa "I/OAT: Add support for MSI and MSI-X" in 2.6.24, but is now exposed. Given the NET_DMA use case is deprecated we can revisit moving the driver to use threaded irqs. For now, just tear down the irq and tasklet properly by: 1/ Disable the irq from triggering the tasklet 2/ Disable the irq from re-arming 3/ Flush inflight interrupts 4/ Flush the timer 5/ Flush inflight tasklets References: https://lkml.org/lkml/2014/1/27/282 https://lkml.org/lkml/2014/2/19/672 Cc: Ingo Molnar <mingo@elte.hu> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: <stable@vger.kernel.org> Reported-by: Mike Galbraith <bitbucket@online.de> Reported-by: Stanislav Fomichev <stfomichev@yandex-team.ru> Tested-by: Mike Galbraith <bitbucket@online.de> Tested-by: Stanislav Fomichev <stfomichev@yandex-team.ru> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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