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alistair23-linux/drivers/bus
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Kim Phillips b69f63ebf5 bus: arm-ccn: fix module unloading Error: Removing state 147 which has instances left. 
Unregistering the driver before calling cpuhp_remove_multi_state() removes
any remaining hotplug cpu instances so __cpuhp_remove_state_cpuslocked()
doesn't emit this warning:

[  268.748362] Error: Removing state 147 which has instances left.
[  268.748373] ------------[ cut here ]------------
[  268.748386] WARNING: CPU: 2 PID: 5476 at kernel/cpu.c:1734 __cpuhp_remove_state_cpuslocked+0x454/0x4f0
[  268.748389] Modules linked in: arm_ccn(-) [last unloaded: arm_ccn]
[  268.748403] CPU: 2 PID: 5476 Comm: rmmod Tainted: G        W       4.14.0-rc4+ #3
[  268.748406] Hardware name: AMD Seattle/Seattle, BIOS 10:18:39 Dec  8 2016
[  268.748410] task: ffff8001a18ca000 task.stack: ffff80019c120000
[  268.748416] PC is at __cpuhp_remove_state_cpuslocked+0x454/0x4f0
[  268.748421] LR is at __cpuhp_remove_state_cpuslocked+0x448/0x4f0
[  268.748425] pc : [<ffff2000081729ec>] lr : [<ffff2000081729e0>] pstate: 60000145
[  268.748427] sp : ffff80019c127d30
[  268.748430] x29: ffff80019c127d30 x28: ffff8001a18ca000
[  268.748437] x27: ffff20000c2cb000 x26: 1fffe4000042d490
[  268.748443] x25: ffff20000216a480 x24: 0000000000000000
[  268.748449] x23: ffff20000b08e000 x22: 0000000000000001
[  268.748455] x21: 0000000000000093 x20: 00000000000016f8
[  268.748460] x19: ffff20000c2cbb80 x18: 0000ffffb5fe7c58
[  268.748466] x17: 00000000004402d0 x16: 1fffe40001864f01
[  268.748472] x15: ffff20000c4bf8b0 x14: 0000000000000000
[  268.748477] x13: 0000000000007032 x12: ffff20000829ae48
[  268.748483] x11: ffff20000c4bf000 x10: 0000000000000004
[  268.748488] x9 : 0000000000006fbc x8 : ffff20000c318a40
[  268.748494] x7 : 0000000000000000 x6 : ffff040001864f02
[  268.748500] x5 : 0000000000000000 x4 : 0000000000000000
[  268.748505] x3 : 0000000000000007 x2 : dfff200000000000
[  268.748510] x1 : 000000000000ad3d x0 : 00000000000001f0
[  268.748516] Call trace:
[  268.748521] Exception stack(0xffff80019c127bf0 to 0xffff80019c127d30)
[  268.748526] 7be0:                                   00000000000001f0 000000000000ad3d
[  268.748531] 7c00: dfff200000000000 0000000000000007 0000000000000000 0000000000000000
[  268.748535] 7c20: ffff040001864f02 0000000000000000 ffff20000c318a40 0000000000006fbc
[  268.748539] 7c40: 0000000000000004 ffff20000c4bf000 ffff20000829ae48 0000000000007032
[  268.748544] 7c60: 0000000000000000 ffff20000c4bf8b0 1fffe40001864f01 00000000004402d0
[  268.748548] 7c80: 0000ffffb5fe7c58 ffff20000c2cbb80 00000000000016f8 0000000000000093
[  268.748553] 7ca0: 0000000000000001 ffff20000b08e000 0000000000000000 ffff20000216a480
[  268.748557] 7cc0: 1fffe4000042d490 ffff20000c2cb000 ffff8001a18ca000 ffff80019c127d30
[  268.748562] 7ce0: ffff2000081729e0 ffff80019c127d30 ffff2000081729ec 0000000060000145
[  268.748566] 7d00: 00000000000001f0 0000000000000000 0001000000000000 0000000000000000
[  268.748569] 7d20: ffff80019c127d30 ffff2000081729ec
[  268.748575] [<ffff2000081729ec>] __cpuhp_remove_state_cpuslocked+0x454/0x4f0
[  268.748580] [<ffff200008172adc>] __cpuhp_remove_state+0x54/0x80
[  268.748597] [<ffff20000215dd84>] arm_ccn_exit+0x2c/0x70 [arm_ccn]
[  268.748604] [<ffff20000834cfbc>] SyS_delete_module+0x5a4/0x708
[  268.748607] Exception stack(0xffff80019c127ec0 to 0xffff80019c128000)
[  268.748612] 7ec0: 0000000019bb7258 0000000000000800 ba64d0fb3d26a800 00000000000000da
[  268.748616] 7ee0: 0000ffffb6144e28 0000ffffcd95b409 fefefefefefefeff 7f7f7f7f7f7f7f7f
[  268.748621] 7f00: 000000000000006a 1999999999999999 0000ffffb6179000 0000000000bbcc6d
[  268.748625] 7f20: 0000ffffb6176b98 0000ffffcd95c2d0 0000ffffb5fe7b58 0000ffffb6163000
[  268.748630] 7f40: 0000ffffb60ad3e0 00000000004402d0 0000ffffb5fe7c58 0000000019bb71f0
[  268.748634] 7f60: 0000ffffcd95c740 0000000000000000 0000000019bb71f0 0000000000416700
[  268.748639] 7f80: 0000000000000000 00000000004402e8 0000000019bb6010 0000ffffcd95c748
[  268.748643] 7fa0: 0000000000000000 0000ffffcd95c460 00000000004113a8 0000ffffcd95c460
[  268.748648] 7fc0: 0000ffffb60ad3e8 0000000080000000 0000000019bb7258 000000000000006a
[  268.748652] 7fe0: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
[  268.748657] [<ffff200008084f9c>] __sys_trace_return+0x0/0x4
[  268.748661] ---[ end trace a996d358dcaa7f9c ]---

Fixes: 8df038725a ("bus/arm-ccn: Use cpu-hp's multi instance support instead custom list")
Signed-off-by: Kim Phillips <kim.phillips@arm.com>
Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: stable@vger.kernel.org # 4.8+
Signed-off-by: Pawel Moll <pawel.moll@arm.com>
 		2017-12-04 17:15:20 +00:00
..
Kconfig ARM: SoC driver updates for v4.15 2017-11-16 16:05:01 -08:00
Makefile ARM: SoC driver updates for v4.15 2017-11-16 16:05:01 -08:00
arm-cci.c bus: arm-cci: Fix use of smp_processor_id() in preemptible context 2017-12-04 16:56:43 +00:00
arm-ccn.c bus: arm-ccn: fix module unloading Error: Removing state 147 which has instances left. 2017-12-04 17:15:20 +00:00
brcmstb_gisb.c bus: brcmstb_gisb: update to support new revision 2017-05-13 20:18:57 -07:00
da8xx-mstpri.c bus: da850-mstpri: fix my e-mail address 2017-01-02 15:52:32 +05:30
imx-weim.c bus: Convert to using %pOF instead of full_name 2017-08-16 17:21:40 +02:00
mips_cdmm.c MIPS/BUS/CDMM: Convert to hotplug state machine 2016-09-06 18:30:25 +02:00
mvebu-mbus.c bus: mbus: fix window size calculation for 4GB windows 2017-10-12 15:01:30 +02:00
omap-ocp2scp.c bus: omap-ocp2scp: Fix error handling in omap_ocp2scp_probe 2017-07-12 02:25:41 -07:00
omap_l3_noc.c Merge branches 'pm-sleep' and 'pm-runtime' 2015-06-19 01:18:02 +02:00
omap_l3_noc.h bus: omap_l3_noc: Fix master id address decoding for OMAP5 2015-05-04 10:21:01 -07:00
omap_l3_smx.c genirq: Remove the deprecated 'IRQF_DISABLED' request_irq() flag entirely 2015-03-05 20:53:06 +01:00
omap_l3_smx.h drivers: bus: Move the OMAP interconnect driver to drivers/bus/ 2012-09-19 16:53:26 +02:00
qcom-ebi2.c bus: qcom: add EBI2 driver 2016-09-08 15:27:05 +02:00
simple-pm-bus.c drivers: bus: Add Simple Power-Managed Bus Driver 2015-02-24 06:36:18 +09:00
sunxi-rsb.c bus: Convert to using %pOF instead of full_name 2017-08-16 17:21:40 +02:00
tegra-aconnect.c bus: tegra-aconnect: Use of_pm_clk_add_clk() 2016-08-16 12:22:51 +02:00
tegra-gmi.c bus: Add support for Tegra Generic Memory Interface 2016-11-15 17:27:53 +01:00
ti-sysc.c bus: ti-sysc: Fix unbalanced pm_runtime_enable by adding remove 2017-10-13 10:48:40 -07:00
ts-nbus.c bus: add driver for the Technologic Systems NBUS 2017-11-07 16:28:19 +01:00
uniphier-system-bus.c bus: uniphier-system-bus: set up registers when resuming 2017-08-04 12:57:18 +02:00
vexpress-config.c bus: vexpress-config: fix device reference leak 2016-11-30 23:29:37 +01:00