mirror of
https://github.com/torvalds/linux
synced 2024-07-22 19:21:07 +00:00
a9dadc1c51
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>
|
||
|---|---|---|
| .. | ||
| ge | ||
| xics | ||
| xive | ||
| 6xx-suspend.S | ||
| axonram.c | ||
| cpm1.c | ||
| cpm2.c | ||
| cpm2_pic.c | ||
| cpm2_pic.h | ||
| cpm_common.c | ||
| dart.h | ||
| dart_iommu.c | ||
| dcr-low.S | ||
| dcr.c | ||
| ehv_pic.c | ||
| fsl_85xx_cache_ctlr.h | ||
| fsl_85xx_cache_sram.c | ||
| fsl_85xx_l2ctlr.c | ||
| fsl_gtm.c | ||
| fsl_lbc.c | ||
| fsl_mpic_err.c | ||
| fsl_mpic_timer_wakeup.c | ||
| fsl_msi.c | ||
| fsl_msi.h | ||
| fsl_pci.c | ||
| fsl_pci.h | ||
| fsl_pmc.c | ||
| fsl_rcpm.c | ||
| fsl_rio.c | ||
| fsl_rio.h | ||
| fsl_rmu.c | ||
| fsl_soc.c | ||
| fsl_soc.h | ||
| grackle.c | ||
| i8259.c | ||
| indirect_pci.c | ||
| ipic.c | ||
| ipic.h | ||
| Kconfig | ||
| Makefile | ||
| micropatch.c | ||
| mmio_nvram.c | ||
| mpc5xxx_clocks.c | ||
| mpic.c | ||
| mpic.h | ||
| mpic_msgr.c | ||
| mpic_msi.c | ||
| mpic_timer.c | ||
| mpic_u3msi.c | ||
| msi_bitmap.c | ||
| mv64x60.h | ||
| mv64x60_dev.c | ||
| mv64x60_pci.c | ||
| mv64x60_pic.c | ||
| mv64x60_udbg.c | ||
| of_rtc.c | ||
| pmi.c | ||
| rtc_cmos_setup.c | ||
| scom.c | ||
| simple_gpio.c | ||
| simple_gpio.h | ||
| tsi108_dev.c | ||
| tsi108_pci.c | ||
| udbg_memcons.c | ||
| xilinx_intc.c | ||
| xilinx_pci.c | ||