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linux/drivers/irqchip
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Nam Cao 1883332bf2 irqchip/sifive-plic: Fix frozen interrupt due to affinity setting 
[ Upstream commit 1072020685 ]

PLIC ignores interrupt completion message for disabled interrupt, explained
by the specification:

    The PLIC signals it has completed executing an interrupt handler by
    writing the interrupt ID it received from the claim to the
    claim/complete register. The PLIC does not check whether the completion
    ID is the same as the last claim ID for that target. If the completion
    ID does not match an interrupt source that is currently enabled for
    the target, the completion is silently ignored.

This caused problems in the past, because an interrupt can be disabled
while still being handled and plic_irq_eoi() had no effect. That was fixed
by checking if the interrupt is disabled, and if so enable it, before
sending the completion message. That check is done with irqd_irq_disabled().

However, that is not sufficient because the enable bit for the handling
hart can be zero despite irqd_irq_disabled(d) being false. This can happen
when affinity setting is changed while a hart is still handling the
interrupt.

This problem is easily reproducible by dumping a large file to uart (which
generates lots of interrupts) and at the same time keep changing the uart
interrupt's affinity setting. The uart port becomes frozen almost
instantaneously.

Fix this by checking PLIC's enable bit instead of irqd_irq_disabled().

Fixes: cc9f04f9a8 ("irqchip/sifive-plic: Implement irq_set_affinity() for SMP host")
Signed-off-by: Nam Cao <namcao@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Link: https://patch.msgid.link/20260212114125.3148067-1-namcao@linutronix.de
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2026-03-12 07:09:09 -04:00
..
alphascale_asm9260-icoll.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
exynos-combiner.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-aclint-sswi.c irqchip/aslint-sswi: Resolve hart index 2025-06-26 16:06:40 +02:00
irq-al-fic.c A set of cleanups for the generic interrupt subsystem: 2025-05-27 08:07:32 -07:00
irq-alpine-msi.c irqchip/alpine-msi: Switch to msi_create_parent_irq_domain() 2025-07-03 15:49:25 +02:00
irq-apple-aic.c irqchip: Switch to of_fwnode_handle() 2025-05-16 21:06:07 +02:00
irq-armada-370-xp.c irqchip/armada-370-xp: Switch to msi_create_parent_irq_domain() 2025-07-03 15:49:25 +02:00
irq-aspeed-i2c-ic.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-aspeed-intc.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-aspeed-scu-ic.c irqchip/aspeed-scu-ic: Fix an IS_ERR() vs NULL check 2025-10-07 10:23:22 +02:00
irq-aspeed-vic.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-ath79-cpu.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
irq-ath79-misc.c irqchip/ath79-misc: Fix missing prototypes warnings 2025-06-20 21:38:52 +02:00
irq-atmel-aic-common.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-atmel-aic-common.h irqchip/atmel-aic: Remove root argument from ->fixup() prototype 2017-07-04 11:10:37 +01:00
irq-atmel-aic.c irqchip/atmel-aic[5]: Fix incorrect lock guard conversion 2025-08-23 21:41:07 +02:00
irq-atmel-aic5.c irqchip/atmel-aic[5]: Fix incorrect lock guard conversion 2025-08-23 21:41:07 +02:00
irq-bcm2712-mip.c irqchip: Pass platform device to platform drivers 2025-12-18 14:02:31 +01:00
irq-bcm2835.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-bcm2836.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-bcm6345-l1.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-bcm7038-l1.c irqchip: Pass platform device to platform drivers 2025-12-18 14:02:31 +01:00
irq-bcm7120-l2.c irqchip: Pass platform device to platform drivers 2025-12-18 14:02:31 +01:00
irq-brcmstb-l2.c irqchip: Pass platform device to platform drivers 2025-12-18 14:02:31 +01:00
irq-clps711x.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-crossbar.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-csky-apb-intc.c A set of cleanups for the generic interrupt subsystem: 2025-05-27 08:07:32 -07:00
irq-csky-mpintc.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-davinci-cp-intc.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-digicolor.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-dw-apb-ictl.c A set of cleanups for the generic interrupt subsystem: 2025-05-27 08:07:32 -07:00
irq-econet-en751221.c irqchip/econet-en751221: Switch to of_fwnode_handle() 2025-05-13 16:39:03 +02:00
irq-ftintc010.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-gic-common.c irqchip/gic-v3: Make distributor priorities variables 2024-06-24 18:16:44 +01:00
irq-gic-common.h irqchip/gic-v3: Rename GICv3 ITS MSI parent 2025-07-08 18:35:52 +01:00
irq-gic-its-msi-parent.c irqchip/gic-v5: Add GICv5 ITS support 2025-07-08 18:35:52 +01:00
irq-gic-its-msi-parent.h irqchip/gic-v5: Add GICv5 ITS support 2025-07-08 18:35:52 +01:00
irq-gic-pm.c irqchip: Explicitly include correct DT includes 2023-08-21 17:49:11 +01:00
irq-gic-realview.c irqchip/gic/realview: Fix refcount leak in realview_gic_of_init 2022-06-09 17:36:57 +01:00
irq-gic-v2m.c irqchip/gic-v2m: Handle Multiple MSI base IRQ Alignment 2025-09-04 14:52:47 +02:00
irq-gic-v3-its-fsl-mc-msi.c of/irq: Convert of_msi_map_id() callers to of_msi_xlate() 2025-09-03 09:01:26 -05:00
irq-gic-v3-its.c irqchip/gic-v3-its: Avoid truncating memory addresses 2026-01-30 10:32:26 +01:00
irq-gic-v3-mbi.c Updates for the MSI subsystem (core code and PCI): 2025-05-27 08:15:26 -07:00
irq-gic-v3.c irqchip: Use int type to store negative error codes 2025-09-03 14:10:30 +02:00
irq-gic-v4.c KVM: arm64: WARN if unmapping a vLPI fails in any path 2025-06-20 13:52:29 -07:00
irq-gic-v5-irs.c Updates for interrupt chip drivers: 2025-09-30 16:00:29 -07:00
irq-gic-v5-its.c irqchip/gic-v5: Fix gicv5_its_map_event() ITTE read endianness 2026-01-17 16:35:30 +01:00
irq-gic-v5-iwb.c irqchip/gic-v5: iwb: Fix iounmap probe failure path 2025-08-05 10:43:48 +02:00
irq-gic-v5.c irqchip/gic-v5: Drop has_gcie_v3_compat from gic_kvm_info 2025-09-17 17:41:02 +01:00
irq-gic.c arm64: cpucaps: Rename GICv3 CPU interface capability 2025-07-08 18:35:51 +01:00
irq-goldfish-pic.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-hip04.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-i8259.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-idt3243x.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-imgpdc.c irqchip: Use dev_fwnode() 2025-06-12 15:08:12 +02:00
irq-imx-gpcv2.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-imx-intmux.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-imx-irqsteer.c irqchip: Use dev_fwnode() 2025-06-12 15:08:12 +02:00
irq-imx-mu-msi.c irqchip: Pass platform device to platform drivers 2025-12-18 14:02:31 +01:00
irq-ingenic-tcu.c A set of cleanups for the generic interrupt subsystem: 2025-05-27 08:07:32 -07:00
irq-ingenic.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-ixp4xx.c irqchip: Switch to of_fwnode_handle() 2025-05-16 21:06:07 +02:00
irq-jcore-aic.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-keystone.c irqchip: Use dev_fwnode() 2025-06-12 15:08:12 +02:00
irq-lan966x-oic.c A set of cleanups for the generic interrupt subsystem: 2025-05-27 08:07:32 -07:00
irq-loongarch-avec.c irqchip: Make irq-msi-lib.h globally available 2025-05-16 21:32:19 +02:00
irq-loongarch-cpu.c irqchip: Switch to of_fwnode_handle() 2025-05-16 21:06:07 +02:00
irq-loongson-eiointc.c irqchip/loongson-eiointc: Add multiple interrupt pin routing support 2025-08-24 12:51:04 +02:00
irq-loongson-htpic.c irqchip: Bulk conversion to generic_handle_domain_irq() 2021-06-10 13:09:19 +01:00
irq-loongson-htvec.c irqchip: Switch to of_fwnode_handle() 2025-05-16 21:06:07 +02:00
irq-loongson-liointc.c A set of cleanups for the generic interrupt subsystem: 2025-05-27 08:07:32 -07:00
irq-loongson-pch-lpc.c irqchip/loongson-pch-lpc: Use legacy domain for PCH-LPC IRQ controller 2025-09-09 22:37:57 +02:00
irq-loongson-pch-msi.c irqchip/loongson-pch-msi.c: Switch to msi_create_parent_irq_domain() 2025-07-03 15:49:24 +02:00
irq-loongson-pch-pic.c irqchip: Switch to of_fwnode_handle() 2025-05-16 21:06:07 +02:00
irq-loongson.h irqchip/loongarch-avec: Add AVEC irqchip support 2024-08-23 20:40:27 +02:00
irq-lpc32xx.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-ls-extirq.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-ls-scfg-msi.c irqchip/ls-scfg-msi: Fix NULL dereference in error handling 2025-07-18 14:54:45 +02:00
irq-ls1x.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-madera.c irqchip: Switch back to struct platform_driver::remove() 2024-11-26 20:09:06 +01:00
irq-mbigen.c Updates for the interrupt subsystem: 2024-09-17 07:09:17 +02:00
irq-mchp-eic.c irqchip/mchp-eic: Fix error code in mchp_eic_domain_alloc() 2025-12-18 14:03:40 +01:00
irq-meson-gpio.c irqchip: Pass platform device to platform drivers 2025-12-18 14:02:31 +01:00
irq-mips-cpu.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-mips-gic.c irqchip/mips-gic: Allow forced affinity 2025-06-21 18:20:54 +02:00
irq-mmp.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-mscc-ocelot.c A set of cleanups for the generic interrupt subsystem: 2025-05-27 08:07:32 -07:00
irq-msi-lib.c irqchip/msi-lib: Honor the MSI_FLAG_PCI_MSI_MASK_PARENT flag 2025-09-09 14:44:30 +02:00
irq-mst-intc.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-mtk-cirq.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-mtk-sysirq.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-mvebu-gicp.c irqchip/mvebu-gicp: Fix an IS_ERR() vs NULL check in probe() 2025-08-24 12:00:47 +02:00
irq-mvebu-icu.c irqchip: Make irq-msi-lib.h globally available 2025-05-16 21:32:19 +02:00
irq-mvebu-odmi.c Updates for the MSI subsystem (core code and PCI): 2025-05-27 08:15:26 -07:00
irq-mvebu-pic.c irqchip: Use dev_fwnode() 2025-06-12 15:08:12 +02:00
irq-mvebu-sei.c irqchip/mvebu: Convert to msi_create_parent_irq_domain() helper 2025-05-16 21:32:20 +02:00
irq-mxs.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-nvic.c irqchip: Use int type to store negative error codes 2025-09-03 14:10:30 +02:00
irq-omap-intc.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-ompic.c irqchip/ompic: fix return value check in ompic_of_init() 2018-01-04 11:13:22 +00:00
irq-or1k-pic.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-orion.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-owl-sirq.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-partition-percpu.c genirq: Remove leading space from irq_chip::irq_print_chip() callbacks 2025-02-07 08:56:01 +01:00
irq-pic32-evic.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-pruss-intc.c irqchip: Use dev_fwnode() 2025-06-12 15:08:12 +02:00
irq-qcom-mpm.c irqchip: Pass platform device to platform drivers 2025-12-18 14:02:31 +01:00
irq-rda-intc.c irq: remove handle_domain_{irq,nmi}() 2021-10-26 10:13:31 +01:00
irq-realtek-rtl.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-renesas-intc-irqpin.c irqchip/renesas-intc-irqpin: Convert to DEFINE_SIMPLE_DEV_PM_OPS() 2025-07-18 16:46:09 +02:00
irq-renesas-irqc.c irqchip/renesas-irqc: Convert to DEFINE_SIMPLE_DEV_PM_OPS() 2025-07-18 16:46:09 +02:00
irq-renesas-rza1.c irqchip: Use int type to store negative error codes 2025-09-03 14:10:30 +02:00
irq-renesas-rzg2l.c irqchip: Pass platform device to platform drivers 2025-12-18 14:02:31 +01:00
irq-renesas-rzv2h.c irqchip/renesas-rzv2h: Prevent TINT spurious interrupt during resume 2026-01-30 10:32:28 +01:00
irq-riscv-aplic-direct.c irqchip/riscv-aplic: Use riscv_get_hart_index() 2025-06-26 16:06:40 +02:00
irq-riscv-aplic-main.c irqchip/riscv-aplic: Prevent crash when MSI domain is missing 2024-11-16 00:45:37 +01:00
irq-riscv-aplic-main.h irqchip/riscv-aplic: Add ACPI support 2024-08-27 15:48:36 +02:00
irq-riscv-aplic-msi.c irqchip/riscv-aplic: Prevent crash when MSI domain is missing 2024-11-16 00:45:37 +01:00
irq-riscv-imsic-early.c irqchip/riscv-imsic: Add a CPU pm notifier to restore the IMSIC on exit 2026-03-04 07:19:39 -05:00
irq-riscv-imsic-platform.c irqchip/riscv-imsic: Don't dereference before NULL pointer check 2025-08-05 10:29:24 +02:00
irq-riscv-imsic-state.c irqchip/riscv-imsic: Add kernel parameter to disable IPIs 2025-07-18 16:46:09 +02:00
irq-riscv-imsic-state.h irqchip/riscv-imsic: Add kernel parameter to disable IPIs 2025-07-18 16:46:09 +02:00
irq-riscv-intc.c irqchip/riscv-intc: Add missing free() callback in riscv_intc_domain_ops 2025-11-14 16:52:34 +01:00
irq-riscv-rpmi-sysmsi.c irqchip/riscv-rpmi-sysmsi: Add ACPI support 2025-09-25 19:49:19 -06:00
irq-sa11x0.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-sg2042-msi.c irqchip/sg2042-msi: Set irq type according to DT configuration 2025-09-04 14:52:48 +02:00
irq-sifive-plic.c irqchip/sifive-plic: Fix frozen interrupt due to affinity setting 2026-03-12 07:09:09 -04:00
irq-sl28cpld.c irqchip/irq-sl28cpld: remove MODULE_LICENSE in non-modules 2023-04-13 13:13:53 -07:00
irq-sni-exiu.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-sp7021-intc.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-st.c irqchip: Explicitly include correct DT includes 2023-08-21 17:49:11 +01:00
irq-starfive-jh8100-intc.c irqchip: Pass platform device to platform drivers 2025-12-18 14:02:31 +01:00
irq-stm32-exti.c A set of cleanups for the generic interrupt subsystem: 2025-05-27 08:07:32 -07:00
irq-stm32mp-exti.c irqchip: Use dev_fwnode() 2025-06-12 15:08:12 +02:00
irq-sun4i.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-sun6i-r.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-sunxi-nmi.c A set of cleanups for the generic interrupt subsystem: 2025-05-27 08:07:32 -07:00
irq-tb10x.c A set of cleanups for the generic interrupt subsystem: 2025-05-27 08:07:32 -07:00
irq-tegra.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-ti-sci-inta.c irqchip: Use dev_fwnode() 2025-06-12 15:08:12 +02:00
irq-ti-sci-intr.c irqchip: Use dev_fwnode() 2025-06-12 15:08:12 +02:00
irq-ts4800.c irqchip: Use dev_fwnode() 2025-06-12 15:08:12 +02:00
irq-uniphier-aidet.c irqchip: Switch to of_fwnode_handle() 2025-05-16 21:06:07 +02:00
irq-versatile-fpga.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-vf610-mscm-ir.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-vic.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-vt8500.c irqchip/irq-vt8500: Switch to irq_domain_create_*() 2025-05-07 15:36:56 +02:00
irq-wpcm450-aic.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-xilinx-intc.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-xtensa-mx.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-xtensa-pic.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irq-zevio.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00
irqchip.c irqchip: Pass platform device to platform drivers 2025-12-18 14:02:31 +01:00
Kconfig irqchip/riscv-rpmi-sysmsi: Add ACPI support 2025-09-25 19:49:19 -06:00
Makefile irqchip: Add driver for the RPMI system MSI service group 2025-09-25 14:31:56 -06:00
qcom-irq-combiner.c irqchip/qcom-irq-combiner: Fix section mismatch 2025-12-18 14:02:31 +01:00
qcom-pdc.c irqchip: Pass platform device to platform drivers 2025-12-18 14:02:31 +01:00
spear-shirq.c irqchip: Switch to irq_domain_create_*() 2025-05-16 21:06:09 +02:00