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linux/arch/powerpc/sysdev
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Cédric Le Goater a9dadc1c51 powerpc/xive: Fix the size of the cpumask used in xive_find_target_in_mask() 
When called from xive_irq_startup(), the size of the cpumask can be
larger than nr_cpu_ids. This can result in a WARN_ON such as:

  WARNING: CPU: 10 PID: 1 at ../arch/powerpc/sysdev/xive/common.c:476 xive_find_target_in_mask+0x110/0x2f0
  ...
  NIP [c00000000008a310] xive_find_target_in_mask+0x110/0x2f0
  LR [c00000000008a2e4] xive_find_target_in_mask+0xe4/0x2f0
  Call Trace:
    xive_find_target_in_mask+0x74/0x2f0 (unreliable)
    xive_pick_irq_target.isra.1+0x200/0x230
    xive_irq_startup+0x60/0x180
    irq_startup+0x70/0xd0
    __setup_irq+0x7bc/0x880
    request_threaded_irq+0x14c/0x2c0
    request_event_sources_irqs+0x100/0x180
    __machine_initcall_pseries_init_ras_IRQ+0x104/0x134
    do_one_initcall+0x68/0x1d0
    kernel_init_freeable+0x290/0x374
    kernel_init+0x24/0x170
    ret_from_kernel_thread+0x5c/0x74

This happens because we're being called with our affinity mask set to
irq_default_affinity. That in turn was populated using
cpumask_setall(), which sets NR_CPUs worth of bits, not nr_cpu_ids
worth. Finally cpumask_weight() will return > nr_cpu_ids when passed a
mask which has > nr_cpu_ids bits set.

Fix it by limiting the value returned by cpumask_weight().

Signed-off-by: Cédric Le Goater <clg@kaod.org>
[mpe: Add change log details on actual cause]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
 		2017-08-24 15:20:18 +10:00
..
ge powerpc: Remove all usages of NO_IRQ 2016-09-20 20:57:12 +10:00
xics powerpc/powernv: Fix oops on P9 DD1 in cause_ipi() 2017-04-26 23:28:12 +10:00
xive powerpc/xive: Fix the size of the cpumask used in xive_find_target_in_mask() 2017-08-24 15:20:18 +10:00
6xx-suspend.S powerpc: Use CURRENT_THREAD_INFO instead of open coded assembly 2012-07-11 14:18:22 +10:00
Kconfig powerpc/xive: Native exploitation of the XIVE interrupt controller 2017-04-10 21:41:34 +10:00
Makefile powerpc/8xx: Move mpc8xx_pic.c from sysdev to platform/8xx 2017-08-10 23:32:07 +10:00
axonram.c powerpc: Convert to using %pOF instead of full_name 2017-08-23 22:27:04 +10:00
cpm1.c powerpc/8xx: Adding support of IRQ in MPC8xx GPIO 2017-05-02 22:35:00 -05:00
cpm2.c soc/fsl/qe: fix Oops on CPM1 (and likely CPM2) 2016-09-25 02:38:52 -05:00
cpm2_pic.c powerpc/cpm2: Use irq_set_handler_locked() 2015-09-16 15:43:10 +02:00
cpm2_pic.h
…
cpm_common.c soc/fsl/qe: fix Oops on CPM1 (and likely CPM2) 2016-09-25 02:38:52 -05:00
dart.h
…
dart_iommu.c dma-mapping: use unsigned long for dma_attrs 2016-08-04 08:50:07 -04:00
dcr-low.S ppc: move exports to definitions 2016-08-07 23:50:09 -04:00
dcr.c powerpc: Convert to using %pOF instead of full_name 2017-08-23 22:27:04 +10:00
ehv_pic.c powerpc: Remove all usages of NO_IRQ 2016-09-20 20:57:12 +10:00
fsl_85xx_cache_ctlr.h powerpc/85xx: Fix sram_offset parameter type 2012-07-26 13:24:32 -05:00
fsl_85xx_cache_sram.c powerpc: Convert to using %pOF instead of full_name 2017-08-23 22:27:04 +10:00
fsl_85xx_l2ctlr.c powerpc/85xx: Don't report SRAM to L2 cache fallback as error 2016-07-08 19:55:34 -05:00
fsl_gtm.c powerpc: Convert to using %pOF instead of full_name 2017-08-23 22:27:04 +10:00
fsl_lbc.c powerpc/fsl-lbc: use DEFINE_SPINLOCK() 2016-12-09 23:08:40 -06:00
fsl_mpic_err.c powerpc: Remove all usages of NO_IRQ 2016-09-20 20:57:12 +10:00
fsl_mpic_timer_wakeup.c powerpc/fsl: add MPIC timer wakeup support 2013-07-01 18:38:42 -05:00
fsl_msi.c powerpc: Convert to using %pOF instead of full_name 2017-08-23 22:27:04 +10:00
fsl_msi.h powerpc/85xx: workaround for chips with MSI hardware errata 2015-03-23 19:51:18 -05:00
fsl_pci.c powerpc: Convert to using %pOF instead of full_name 2017-08-23 22:27:04 +10:00
fsl_pci.h EDAC, mpc85xx: Make mpc85xx-pci-edac a platform device 2015-12-11 16:56:16 +01:00
fsl_pmc.c powerpc/fsl_pmc: use builtin_platform_driver 2016-12-04 19:51:44 -06:00
fsl_rcpm.c powerpc/rcpm: Fix build break when SMP=n 2016-03-16 15:22:32 +11:00
fsl_rio.c powerpc: Convert to using %pOF instead of full_name 2017-08-23 22:27:04 +10:00
fsl_rio.h rapidio: add global inbound port write interfaces 2016-03-22 15:36:02 -07:00
fsl_rmu.c powerpc: Convert to using %pOF instead of full_name 2017-08-23 22:27:04 +10:00
fsl_soc.c powerpc/cpm1: link to CONFIG_CPM1 instead of CONFIG_8xx 2017-08-10 23:32:05 +10:00
fsl_soc.h powerpc/cpm1: link to CONFIG_CPM1 instead of CONFIG_8xx 2017-08-10 23:32:05 +10:00
grackle.c powerpc: rename ppc_pci_*_flags to pci_*_flags 2011-07-12 09:28:04 -05:00
i8259.c powerpc: Remove all usages of NO_IRQ 2016-09-20 20:57:12 +10:00
indirect_pci.c powerpc/fsl_pci: Fix pci stack build bug with FRAME_WARN 2015-01-29 19:56:15 -06:00
ipic.c powerpc/ipic: Support edge on IRQ0 2017-07-24 21:20:31 +10:00
ipic.h irq_domain/powerpc: Use common irq_domain structure instead of irq_host 2012-02-14 14:06:50 -07:00
micropatch.c powerpc/8xx: Remove empty asm/mpc8xx.h 2014-06-25 18:49:40 -05:00
mmio_nvram.c powerpc/sparse: Make a bunch of things static 2016-09-13 17:35:47 +10:00
mpc5xxx_clocks.c powerpc/mpc5xxx: Use of_get_next_parent to simplify code 2015-10-15 20:32:01 +11:00
mpic.c powerpc: Convert to using %pOF instead of full_name 2017-08-23 22:27:04 +10:00
mpic.h powerpc/pasemi: Only the build the pasemi MSI code for PASEMI=y 2015-05-11 19:55:25 +10:00
mpic_msgr.c powerpc: Convert to using %pOF instead of full_name 2017-08-23 22:27:04 +10:00
mpic_msi.c powerpc: Convert to using %pOF instead of full_name 2017-08-23 22:27:04 +10:00
mpic_timer.c powerpc: Convert to using %pOF instead of full_name 2017-08-23 22:27:04 +10:00
mpic_u3msi.c powerpc: Remove all usages of NO_IRQ 2016-09-20 20:57:12 +10:00
msi_bitmap.c powerpc: Convert to using %pOF instead of full_name 2017-08-23 22:27:04 +10:00
mv64x60.h
…
mv64x60_dev.c powerpc: Convert to using %pOF instead of full_name 2017-08-23 22:27:04 +10:00
mv64x60_pci.c powerpc: Convert to using %pOF instead of full_name 2017-08-23 22:27:04 +10:00
mv64x60_pic.c powerpc: Remove all usages of NO_IRQ 2016-09-20 20:57:12 +10:00
mv64x60_udbg.c dt/bindings: Remove device_type "serial" from marvell,mv64360-mpsc 2014-01-16 16:31:31 +00:00
of_rtc.c powerpc: Convert to using %pOF instead of full_name 2017-08-23 22:27:04 +10:00
pmi.c powerpc: Remove all usages of NO_IRQ 2016-09-20 20:57:12 +10:00
rtc_cmos_setup.c PTR_RET is now PTR_ERR_OR_ZERO(): Replace most. 2013-07-15 11:25:01 +09:30
scom.c powerpc: Convert to using %pOF instead of full_name 2017-08-23 22:27:04 +10:00
simple_gpio.c powerpc: Convert to using %pOF instead of full_name 2017-08-23 22:27:04 +10:00
simple_gpio.h
…
tsi108_dev.c Disintegrate asm/system.h for PowerPC 2012-03-28 18:30:02 +01:00
tsi108_pci.c powerpc: Convert to using %pOF instead of full_name 2017-08-23 22:27:04 +10:00
udbg_memcons.c powerpc: Delete non-required instances of include <linux/init.h> 2014-01-15 13:46:44 +11:00
xilinx_intc.c powerpc/virtex: Use generic xilinx irqchip driver 2016-11-29 09:14:50 +00:00
xilinx_pci.c powerpc: make of_device_ids const 2014-09-25 23:14:46 +10:00