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Shawn Guo c944b0b935 ARM: imx6: spin the cpu until hardware takes it down 
Though commit 602bf40 (ARM: imx6: exit coherency when shutting down
a cpu) improves the stability of imx6q cpu hotplug a lot, there are
still hangs seen with a more stressful hotplug testing.

It's expected that once imx_enable_cpu(cpu, false) is called, the cpu
will be taken down by hardware immediately, and the code after that
will not get any chance to execute.  However, this is not always the
case from the testing.  The cpu could possibly be alive for a few
cycles before hardware actually takes it down.  So rather than letting
cpu execute some code that could cause a hang in these cycles, let's
make the cpu spin there and wait for hardware to take it down.

Cc: <stable@vger.kernel.org>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
2012-08-23 21:10:22 +08:00
..
include/mach
dmaengine: imx-dma: merge old dma-v1.c with imx-dma.c
2012-03-26 11:31:29 +05:30
clk-busy.c
ARM: imx: add common clock support for clk busy
2012-05-02 12:08:26 +02:00
clk-gate2.c
ARM i.MX: Add common clock support for 2bit gate
2012-05-02 12:08:13 +02:00
clk-imx1.c
ARM i.MX: remove now unnecessary argument from mxc_timer_init
2012-05-16 12:46:09 +02:00
clk-imx6q.c
ARM i.MX6q: Add virtual 1/3.5 dividers in the LDB clock path
2012-08-17 10:31:43 +08:00
clk-imx21.c
ARM i.MX: remove now unnecessary argument from mxc_timer_init
2012-05-16 12:46:09 +02:00
clk-imx25.c
ARM i.MX: remove now unnecessary argument from mxc_timer_init
2012-05-16 12:46:09 +02:00
clk-imx27.c
i.MX27: Fix emma-prp and csi clocks.
2012-08-07 09:14:30 +02:00
clk-imx31.c
ARM: clk-imx31: Fix the keypad clock name
2012-08-03 16:28:47 +02:00
clk-imx35.c
ARM: imx: assert SCC gate stays enabled
2012-07-04 09:38:29 +02:00
clk-imx51-imx53.c
ARM: imx: enable emi_slow_gate clock for imx5
2012-08-03 22:36:00 +08:00
clk-pfd.c
ARM: imx: add common clock support for pfd
2012-05-02 12:08:20 +02:00
clk-pllv1.c
ARM i.MX: Add common clock support for pllv1
2012-05-02 12:07:53 +02:00
clk-pllv2.c
ARM i.MX pllv2: make round_rate accurate
2012-06-04 15:23:47 +02:00
clk-pllv3.c
ARM: imx: add common clock support for pllv3
2012-05-02 12:08:06 +02:00
clk.h
ARM: imx: add common clock support for clk busy
2012-05-02 12:08:26 +02:00
cpu_op-mx51.c
bug.h: add include of it to various implicit C users
2012-02-29 17:15:08 -05:00
cpu_op-mx51.h
ARM i.MX: Merge i.MX5 support into mach-imx
2011-11-16 08:37:37 +01:00
cpu-imx5.c
ARM: imx: use machine specific hook for late init
2012-05-08 20:36:16 +08:00
cpu-imx25.c
ARM: mx25: Print silicon revision on boot
2011-08-26 08:50:58 +02:00
cpu-imx27.c
ARM: mx27: Print silicon revision on boot
2011-08-26 08:50:58 +02:00
cpu-imx31.c
ARM: mx31: use generic function for displaying silicon revision
2011-08-26 08:50:59 +02:00
cpu-imx35.c
ARM: mx35: use generic function for displaying silicon revision
2011-08-26 08:50:59 +02:00
crm-regs-imx5.h
ARM i.MX53: Fix PLL4 base address
2012-06-04 15:23:57 +02:00
crmregs-imx3.h
ARM i.MX3: Make ccm base address a variable
2012-04-25 17:03:45 +02:00
devices-imx1.h
…
devices-imx21.h
ARM: imx: remove unused pdata from device macros
2012-07-06 08:25:20 +02:00
devices-imx25.h
ARM: imx: remove unused pdata from device macros
2012-07-06 08:25:20 +02:00
devices-imx27.h
ARM: imx: remove unused pdata from device macros
2012-07-06 08:25:20 +02:00
devices-imx31.h
arm-soc: sparse IRQ conversion
2012-07-23 17:36:02 -07:00
devices-imx35.h
arm-soc: sparse IRQ conversion
2012-07-23 17:36:02 -07:00
devices-imx50.h
ARM i.MX: Merge i.MX5 support into mach-imx
2011-11-16 08:37:37 +01:00
devices-imx51.h
ARM: imx: remove unused pdata from device macros
2012-07-06 08:25:20 +02:00
devices-imx53.h
ARM: imx: remove unused pdata from device macros
2012-07-06 08:25:20 +02:00
efika.h
ARM i.MX: Merge i.MX5 support into mach-imx
2011-11-16 08:37:37 +01:00
ehci-imx5.c
ARM: imx: fix mx51 ehci setup errors
2012-07-09 10:32:44 +02:00
ehci-imx25.c
ARM: imx: make ehci power/oc polarities configurable
2012-07-09 10:32:39 +02:00
ehci-imx27.c
…
ehci-imx31.c
…
ehci-imx35.c
ARM: imx: make ehci power/oc polarities configurable
2012-07-09 10:32:39 +02:00
eukrea_mbimx27-baseboard.c
ARM: imx: eliminate macro IRQ_GPIOx()
2012-07-01 21:57:16 +08:00
eukrea_mbimxsd25-baseboard.c
ARM: imx: eukrea_mbimxsd25: use IMX_GPIO_NR
2012-05-08 17:31:25 +02:00
eukrea_mbimxsd35-baseboard.c
dma: ipu: remove the use of ipu_platform_data
2012-07-01 21:57:43 +08:00
eukrea_mbimxsd51-baseboard.c
ARM: imx: eukrea_mbimxsd rename to eukrea_mbimxsd51
2012-05-08 17:31:25 +02:00
gpc.c
arm/imx6q: add core drivers clock, gpc, mmdc and src
2011-10-31 14:26:23 +01:00
head-v7.S
Merge branch 'imx/pm2' of git://git.linaro.org/people/shawnguo/linux-2.6 into imx6/pm
2012-01-06 12:44:05 -08:00
hotplug.c
ARM: imx6: spin the cpu until hardware takes it down
2012-08-23 21:10:22 +08:00
imx27-dt.c
arm-soc: sparse IRQ conversion
2012-07-23 17:36:02 -07:00
imx31-dt.c
ARM i.MX31: Add devicetree support
2012-07-10 19:23:03 +02:00
imx51-dt.c
ARM: imx: move irq_domain_add_legacy call into tzic driver
2012-07-01 21:57:29 +08:00
imx53-dt.c
arm-soc: power management changes
2012-07-23 17:43:53 -07:00
iomux-imx31.c
ARM: gpio: convert includes of mach/gpio.h and asm/gpio.h to linux/gpio.h
2011-08-08 14:27:41 +01:00
Kconfig
arm-soc: sparse IRQ conversion
2012-07-23 17:36:02 -07:00
lluart.c
ARM: imx6: Add UART2 for low-level debug
2012-05-11 15:17:57 +08:00
mach-apf9328.c
ARM: imx: remove unneeded mach/irq.h inclusion
2012-07-01 21:58:41 +08:00
mach-armadillo5x0.c
dma: ipu: remove the use of ipu_platform_data
2012-07-01 21:57:43 +08:00
mach-bug.c
ARM: restart: mxc: use new restart hook
2012-01-05 12:57:15 +00:00
mach-cpuimx27.c
arm-soc: sparse IRQ conversion
2012-07-23 17:36:02 -07:00
mach-cpuimx35.c
arm-soc: sparse IRQ conversion
2012-07-23 17:36:02 -07:00
mach-cpuimx51sd.c
arm-soc: sparse IRQ conversion
2012-07-23 17:36:02 -07:00
mach-eukrea_cpuimx25.c
ARM: imx: remove unused pdata from device macros
2012-07-06 08:25:20 +02:00
mach-imx6q.c
arm-soc: power management changes
2012-07-23 17:43:53 -07:00
mach-imx27_visstrim_m10.c
arm-soc: sparse IRQ conversion
2012-07-23 17:36:02 -07:00
mach-imx27ipcam.c
ARM: imx: remove unused pdata from device macros
2012-07-06 08:25:20 +02:00
mach-imx27lite.c
ARM: restart: mxc: use new restart hook
2012-01-05 12:57:15 +00:00
mach-kzm_arm11_01.c
ARM: imx: eliminate macro IOMUX_TO_IRQ()
2012-07-01 21:57:06 +08:00
mach-mx1ads.c
ARM: imx: remove unneeded mach/irq.h inclusion
2012-07-01 21:58:41 +08:00
mach-mx21ads.c
Merge branch 'imx/sparse-irq' of git://git.linaro.org/people/shawnguo/linux-2.6 into next/irq
2012-07-02 23:18:19 +02:00
mach-mx25_3ds.c
ARM: imx: remove unused pdata from device macros
2012-07-06 08:25:20 +02:00
mach-mx27_3ds.c
arm-soc: sparse IRQ conversion
2012-07-23 17:36:02 -07:00
mach-mx27ads.c
arm-soc: sparse IRQ conversion
2012-07-23 17:36:02 -07:00
mach-mx31_3ds.c
arm-soc: sparse IRQ conversion
2012-07-23 17:36:02 -07:00
mach-mx31ads.c
ARM: imx: add a legacy irqdomain for mx31ads
2012-07-01 21:58:21 +08:00
mach-mx31lilly.c
ARM: imx: eliminate macro IOMUX_TO_IRQ()
2012-07-01 21:57:06 +08:00
mach-mx31lite.c
ARM: imx: remove unneeded mach/irq.h inclusion
2012-07-01 21:58:41 +08:00
mach-mx31moboard.c
arm-soc: sparse IRQ conversion
2012-07-23 17:36:02 -07:00
mach-mx35_3ds.c
arm-soc: sparse IRQ conversion
2012-07-23 17:36:02 -07:00
mach-mx50_rdp.c
Consolidate i.MX 5 platforms to be under the new shared i.MX 3/5/6 tree.
2012-01-23 14:50:30 -08:00
mach-mx51_3ds.c
arm-soc: sparse IRQ conversion
2012-07-23 17:36:02 -07:00
mach-mx51_babbage.c
ARM: imx: remove unused pdata from device macros
2012-07-06 08:25:20 +02:00
mach-mx51_efikamx.c
arm-soc: sweeping late_initcall cleanup
2012-05-26 13:14:01 -07:00
mach-mx51_efikasb.c
arm-soc: sweeping late_initcall cleanup
2012-05-26 13:14:01 -07:00
mach-mx53_ard.c
arm-soc: power management changes
2012-07-23 17:43:53 -07:00
mach-mx53_evk.c
arm-soc: power management changes
2012-07-23 17:43:53 -07:00
mach-mx53_loco.c
arm-soc: power management changes
2012-07-23 17:43:53 -07:00
mach-mx53_smd.c
arm-soc: power management changes
2012-07-23 17:43:53 -07:00
mach-mxt_td60.c
ARM: imx: eliminate macro IRQ_GPIOx()
2012-07-01 21:57:16 +08:00
mach-pca100.c
arm-soc: sparse IRQ conversion
2012-07-23 17:36:02 -07:00
mach-pcm037_eet.c
ARM: imx: use machine specific hook for late init
2012-05-08 20:36:16 +08:00
mach-pcm037.c
arm-soc: sparse IRQ conversion
2012-07-23 17:36:02 -07:00
mach-pcm038.c
arm-soc: sparse IRQ conversion
2012-07-23 17:36:02 -07:00
mach-pcm043.c
arm-soc: sparse IRQ conversion
2012-07-23 17:36:02 -07:00
mach-qong.c
arm-soc: sparse IRQ conversion
2012-07-23 17:36:02 -07:00
mach-scb9328.c
ARM: imx: remove unneeded mach/irq.h inclusion
2012-07-01 21:58:41 +08:00
mach-vpr200.c
arm-soc: sparse IRQ conversion
2012-07-23 17:36:02 -07:00
Makefile
ARM i.MX31: Add devicetree support
2012-07-10 19:23:03 +02:00
Makefile.boot
ARM: dts: Add basic support for imx6q-sabresd
2012-05-11 15:17:52 +08:00
mm-imx1.c
ARM: imx: remove unneeded mach/irq.h inclusion
2012-07-01 21:58:41 +08:00
mm-imx3.c
GPIO changes for v3.6:
2012-07-26 13:56:38 -07:00
mm-imx5.c
GPIO changes for v3.6:
2012-07-26 13:56:38 -07:00
mm-imx21.c
ARM: imx: remove unneeded mach/irq.h inclusion
2012-07-01 21:58:41 +08:00
mm-imx25.c
GPIO changes for v3.6:
2012-07-26 13:56:38 -07:00
mm-imx27.c
ARM: imx: remove unneeded mach/irq.h inclusion
2012-07-01 21:58:41 +08:00
mmdc.c
arm/imx6q: add core drivers clock, gpc, mmdc and src
2011-10-31 14:26:23 +01:00
mx1-camera-fiq-ksym.c
…
mx1-camera-fiq.S
…
mx31lilly-db.c
dma: ipu: remove the use of ipu_platform_data
2012-07-01 21:57:43 +08:00
mx31lite-db.c
arm-soc: sparse IRQ conversion
2012-07-23 17:36:02 -07:00
mx31moboard-devboard.c
arm: imx: Start using struct usb_otg
2012-02-13 13:36:03 +02:00
mx31moboard-marxbot.c
arm: imx: Start using struct usb_otg
2012-02-13 13:36:03 +02:00
mx31moboard-smartbot.c
…
mx51_efika.c
ARM: imx: eliminate macro IMX_GPIO_TO_IRQ()
2012-07-01 21:50:09 +08:00
pcm037.h
ARM: imx: use machine specific hook for late init
2012-05-08 20:36:16 +08:00
pcm970-baseboard.c
ARM: imx: eliminate macro IRQ_GPIOx()
2012-07-01 21:57:16 +08:00
platsmp.c
arm/imx6q: add smp and cpu hotplug support
2011-10-31 14:26:24 +01:00
pm-imx3.c
ARM i.MX3: Make ccm base address a variable
2012-04-25 17:03:45 +02:00
pm-imx5.c
ARM: imx: Add imx5 cpuidle
2012-06-05 08:51:47 +02:00
pm-imx6q.c
ARM: imx6q: resume PL310 only when CACHE_L2X0 defined
2011-12-26 10:18:59 +08:00
pm-imx27.c
ARM: plat-mxc: hook special idle handlers to arm_pm_idle
2012-01-20 18:55:14 -05:00
src.c
ARM: 7293/1: logical_cpu_map: decouple CPU mapping from SMP
2012-01-23 10:20:05 +00:00