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linux/drivers/irqchip
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Lucas Zampieri 14fd5e880a irqchip/sifive-plic: Avoid interrupt ID 0 handling during suspend/resume 
[ Upstream commit f75e07bf52 ]

According to the PLIC specification[1], global interrupt sources are
assigned small unsigned integer identifiers beginning at the value 1.
An interrupt ID of 0 is reserved to mean "no interrupt".

The current plic_irq_resume() and plic_irq_suspend() functions incorrectly
start the loop from index 0, which accesses the register space for the
reserved interrupt ID 0.

Change the loop to start from index 1, skipping the reserved
interrupt ID 0 as per the PLIC specification.

This prevents potential undefined behavior when accessing the reserved
register space during suspend/resume cycles.

Fixes: e80f0b6a2c ("irqchip/irq-sifive-plic: Add syscore callbacks for hibernation")
Co-developed-by: Jia Wang <wangjia@ultrarisc.com>
Signed-off-by: Jia Wang <wangjia@ultrarisc.com>
Co-developed-by: Charles Mirabile <cmirabil@redhat.com>
Signed-off-by: Charles Mirabile <cmirabil@redhat.com>
Signed-off-by: Lucas Zampieri <lzampier@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://github.com/riscv/riscv-plic-spec/releases/tag/1.0.0
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2025-10-19 16:34:05 +02:00
..
alphascale_asm9260-icoll.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
exynos-combiner.c Merge branch irq/generic_handle_domain_irq-core into irq/irqchip-next 2021-06-11 14:32:12 +01:00
irq-al-fic.c irqchip/al-fic: remove MODULE_LICENSE in non-modules 2023-04-13 13:13:50 -07:00
irq-alpine-msi.c irqchip/alpine-msi: Fix off-by-one in allocation error path 2024-04-09 11:03:15 +02:00
irq-apple-aic.c irqchip/apple-aic: Only handle PMC interrupt as FIQ when configured so 2025-02-17 10:05:41 +01:00
irq-armada-370-xp.c irqchip/armada-370-xp: Use mpic_is_ipi_available() in mpic_of_init() 2024-08-08 17:15:01 +02:00
irq-aspeed-i2c-ic.c irqchip/aspeed-i2c-ic: Fix irq_of_parse_and_map() return value 2022-05-04 16:37:48 +01:00
irq-aspeed-scu-ic.c irqchip/aspeed-scu-ic: Correctly initialise status and enable registers 2023-02-05 10:55:19 +00:00
irq-aspeed-vic.c irq: remove handle_domain_{irq,nmi}() 2021-10-26 10:13:31 +01:00
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: Bulk conversion to generic_handle_domain_irq() 2021-06-10 13:09:19 +01:00
irq-atmel-aic-common.c of: remove internal arguments from of_property_for_each_u32() 2024-07-25 06:53:47 -05:00
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: Remove asmlinkage for handlers registered with set_handle_irq() 2024-07-30 13:35:49 +02:00
irq-atmel-aic5.c irqchip: Remove asmlinkage for handlers registered with set_handle_irq() 2024-07-30 13:35:49 +02:00
irq-bcm2835.c irqchip/bcm2835: Enable SKIP_SET_WAKE and MASK_ON_SUSPEND 2024-07-15 15:13:55 +02:00
irq-bcm2836.c irqchip: Use irq_domain_alloc_irqs() 2023-01-11 19:51:39 +01:00
irq-bcm6345-l1.c irqchip/irq-bcm6345-l1: Avoid explicit cpumask allocation on stack 2024-04-24 21:23:49 +02:00
irq-bcm7038-l1.c irqchip/irq-bcm7038-l1: Prefer struct_size over open coded arithmetic 2024-02-13 10:53:15 +01:00
irq-bcm7120-l2.c irqchip/irq-bcm7120-l2: Set IRQ_LEVEL for level triggered interrupts 2023-02-18 14:23:41 +00:00
irq-brcmstb-l2.c irqchip/irq-brcmstb-l2: Avoid saving mask on shutdown 2024-04-24 21:11:48 +02:00
irq-clps711x.c irqchip: Remove asmlinkage for handlers registered with set_handle_irq() 2024-07-30 13:35:49 +02:00
irq-crossbar.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
irq-csky-apb-intc.c irqchip: Use of_property_read_bool() for boolean properties 2023-04-08 11:07:49 +01:00
irq-csky-mpintc.c irqchip/csky-mpintc: Fixup mask/unmask implementation 2021-11-12 16:09:50 +00:00
irq-davinci-cp-intc.c irqchip: Remove asmlinkage for handlers registered with set_handle_irq() 2024-07-30 13:35:49 +02:00
irq-digicolor.c irq: remove handle_domain_{irq,nmi}() 2021-10-26 10:13:31 +01:00
irq-dw-apb-ictl.c Revert "irqchip/dw-apb-ictl: Support building as module" 2024-06-25 21:30:48 +02:00
irq-ftintc010.c irqchip: Remove asmlinkage for handlers registered with set_handle_irq() 2024-07-30 13:35:49 +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 Switch ARM/ARM64 over to the modern per device MSI domains: 2024-07-22 14:02:19 -07:00
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: Prevent use after free of gicv2m_get_fwnode() 2025-05-02 07:59:07 +02:00
irq-gic-v3-its-fsl-mc-msi.c irqchip: Explicitly include correct DT includes 2023-08-21 17:49:11 +01:00
irq-gic-v3-its-msi-parent.c irqchip/gic-v3-its: Correctly fish out the DID for platform MSI 2024-07-18 20:34:46 +02:00
irq-gic-v3-its.c irqchip/gic-v3-its: Don't enable interrupts in its_irq_set_vcpu_affinity() 2025-01-23 17:23:02 +01:00
irq-gic-v3-mbi.c irqchip/gic_v3_mbi: Switch over to parent domain 2024-07-18 20:31:20 +02:00
irq-gic-v3.c irqchip/gic-v3: Fix rk3399 workaround when secure interrupts are enabled 2025-02-27 04:30:23 -08:00
irq-gic-v4.c irqchip/gic-v4.1: Replace bare number with ID_AA64PFR0_EL1_GIC_V4P1 2024-08-02 14:54:25 +02:00
irq-gic.c irqchip/gic: Correct declaration of *percpu_base pointer in union gic_base 2025-01-09 13:33:47 +01:00
irq-goldfish-pic.c irqchip: Bulk conversion to generic_handle_domain_irq() 2021-06-10 13:09:19 +01:00
irq-hip04.c irqchip/gic-v3: Make distributor priorities variables 2024-06-24 18:16:44 +01:00
irq-i8259.c irqchipr/i8259: Mark i8259_of_init() static 2023-08-21 17:40:30 +01:00
irq-idt3243x.c irqchip: Bulk conversion to generic_handle_domain_irq() 2021-06-10 13:09:19 +01:00
irq-imgpdc.c irqchip/imgpdc: Convert to platform_driver::remove_new() callback 2024-02-27 18:12:09 +01:00
irq-imx-gpcv2.c irqchip/irq-imx-gpcv2: Mark fwnode device as not initialized 2023-02-08 13:37:55 +01:00
irq-imx-intmux.c Updates for the MSI interrupt subsystem and RISC-V initial MSI support: 2024-03-11 14:03:03 -07:00
irq-imx-irqsteer.c irqchip/imx-irqsteer: Handle runtime power management correctly 2024-07-15 15:13:56 +02:00
irq-imx-mu-msi.c irqchip/imx-mu-msi: Switch to MSI parent 2024-07-18 20:31:20 +02:00
irq-ingenic-tcu.c irqchip/ingenic-tcu: Use correctly sized arguments for bit field 2021-12-16 15:19:52 +00:00
irq-ingenic.c irqchip: Bulk conversion to generic_handle_domain_irq() 2021-06-10 13:09:19 +01:00
irq-ixp4xx.c irqchip: Remove asmlinkage for handlers registered with set_handle_irq() 2024-07-30 13:35:49 +02:00
irq-jcore-aic.c irqchip/jcore-aic, clocksource/drivers/jcore: Fix jcore-pit interrupt request 2025-02-27 04:30:21 -08:00
irq-keystone.c irqchip/keystone: Convert to platform_driver::remove_new() callback 2024-02-27 18:12:09 +01:00
irq-lan966x-oic.c irqchip: Add support for LAN966x OIC 2024-06-17 15:48:15 +02:00
irq-loongarch-avec.c irqchip/loongarch-avec: Add AVEC irqchip support 2024-08-23 20:40:27 +02:00
irq-loongarch-cpu.c Updates for the interrupt subsystem: 2024-09-17 07:09:17 +02:00
irq-loongson-eiointc.c irqchip/loongarch-avec: Add AVEC irqchip support 2024-08-23 20:40:27 +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 LoongArch: Move irqchip function prototypes to irq-loongson.h 2024-08-23 20:40:27 +02:00
irq-loongson-liointc.c LoongArch: Move irqchip function prototypes to irq-loongson.h 2024-08-23 20:40:27 +02:00
irq-loongson-pch-lpc.c LoongArch: Move irqchip function prototypes to irq-loongson.h 2024-08-23 20:40:27 +02:00
irq-loongson-pch-msi.c irqchip/loongarch-avec: Add AVEC irqchip support 2024-08-23 20:40:27 +02:00
irq-loongson-pch-pic.c LoongArch: Move irqchip function prototypes to irq-loongson.h 2024-08-23 20:40:27 +02:00
irq-loongson.h irqchip/loongarch-avec: Add AVEC irqchip support 2024-08-23 20:40:27 +02:00
irq-lpc32xx.c irqchip/lpc32xx: Switch to dynamic chip name output 2022-02-15 11:25:46 +00:00
irq-ls-extirq.c irqchip/ls-extirq: Fix endianness detection 2022-12-05 10:39:52 +00:00
irq-ls-scfg-msi.c irqchip/ls-scfg-msi: Convert to platform_driver::remove_new() callback 2024-02-27 18:12:10 +01:00
irq-ls1x.c irqchip: Bulk conversion to generic_handle_domain_irq() 2021-06-10 13:09:19 +01:00
irq-madera.c irqchip/madera: Convert to platform_driver::remove_new() callback 2024-02-27 18:12:10 +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: remove MODULE_LICENSE in non-modules 2023-04-13 13:13:52 -07:00
irq-meson-gpio.c irqchip/meson-gpio: Convert meson_gpio_irq_controller::lock to 'raw_spinlock_t' 2024-07-29 15:43:50 +02:00
irq-mips-cpu.c irqchip/mips: Fix RCU violation when using irqdomain lookup on interrupt entry 2021-07-09 10:18:58 +01:00
irq-mips-gic.c irqchip/mips-gic: Mark gic_irq_domain_free() static 2023-08-21 17:40:20 +01:00
irq-mmp.c irqchip/mmp: Remove non-DT codepath 2023-06-17 07:21:02 +01:00
irq-mscc-ocelot.c irqchip/ocelot: Comment sticky register clearing code 2024-10-02 15:11:07 +02:00
irq-msi-lib.c irqchip/irq-msi-lib: Check for NULL ops in msi_lib_irq_domain_select() 2024-08-23 13:55:15 +02:00
irq-msi-lib.h irqchip/irq-msi-lib: Prepare for DEVICE MSI to replace platform MSI 2024-07-18 20:31:20 +02:00
irq-mst-intc.c irqchip/irq-mst: Support polarity configuration 2021-04-07 13:26:00 +01:00
irq-mtk-cirq.c irqchip/irq-mtk-cirq: Add support for System CIRQ on MT8192 2022-11-28 11:44:02 +00:00
irq-mtk-sysirq.c irqchip/mtk-sysirq: Skip setting irq-wake 2021-08-12 08:15:15 +01:00
irq-mvebu-gicp.c irqchip/mvebu-gicp: Switch to MSI parent 2024-07-18 20:31:20 +02:00
irq-mvebu-icu.c irqchip/irq-mvebu-icu: Fix access to msi_data from irq_domain::host_data 2025-02-17 10:05:37 +01:00
irq-mvebu-odmi.c irqchip/mvebu-odmi: Switch to parent MSI 2024-07-18 20:31:21 +02:00
irq-mvebu-pic.c irqchip: Add missing MODULE_DESCRIPTION() macros 2024-06-23 17:23:08 +02:00
irq-mvebu-sei.c irqchip/irq-mvebu-sei: Move misplaced select() callback to SEI CP domain 2024-12-05 14:02:53 +01:00
irq-mxs.c irqchip/mxs: Declare icoll_handle_irq() as static 2024-04-23 00:28:14 +02:00
irq-nvic.c ARM development updates for 5.18: 2022-03-23 17:35:57 -07:00
irq-omap-intc.c irqchip: Remove asmlinkage for handlers registered with set_handle_irq() 2024-07-30 13:35:49 +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: or1k-pic: Undefine mask_ack for level triggered hardware 2022-06-28 17:31:15 +09:00
irq-orion.c irqchip/orion: Use of_address_count() helper 2023-08-21 17:48:59 +01:00
irq-owl-sirq.c irqchip: Add Actions Semi Owl SIRQ controller 2020-09-25 16:57:33 +01:00
irq-partition-percpu.c irqchip/partitions: Switch to bitmap_zalloc() 2021-07-26 18:01:27 +01:00
irq-pic32-evic.c A couple of fixes for interrupt chip drivers: 2024-08-04 08:36:57 -07:00
irq-pruss-intc.c irqchip/pruss-intc: Convert to platform_driver::remove_new() callback 2024-02-27 18:12:10 +01:00
irq-qcom-mpm.c irqchip/qcom-mpm: Prevent crash when trying to handle non-wake GPIOs 2025-05-09 09:50:31 +02:00
irq-rda-intc.c irq: remove handle_domain_{irq,nmi}() 2021-10-26 10:13:31 +01:00
irq-realtek-rtl.c irqchip/realtek-rtl: use parent interrupts 2022-09-28 14:17:10 +01:00
irq-renesas-intc-irqpin.c irqchip/renesas-intc-irqpin: Convert to platform_driver::remove_new() callback 2024-02-27 18:12:10 +01:00
irq-renesas-irqc.c irqchip/renesas-irqc: Convert to platform_driver::remove_new() callback 2024-02-27 18:12:10 +01:00
irq-renesas-rza1.c irqchip/renesas-rza1: Convert to platform_driver::remove_new() callback 2024-02-27 18:12:10 +01:00
irq-renesas-rzg2l.c irqchip/renesas-rzg2l: Fix missing put_device 2024-10-15 23:54:35 +02:00
irq-riscv-aplic-direct.c irqchip/riscv-aplic: Add support for hart indexes 2025-05-29 11:03:04 +02:00
irq-riscv-aplic-main.c irqchip/riscv-aplic: Prevent crash when MSI domain is missing 2024-12-05 14:01:23 +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 2024-12-05 14:01:23 +01:00
irq-riscv-imsic-early.c irqchip/riscv-imsic: Separate next and previous pointers in IMSIC vector 2025-05-29 11:02:44 +02:00
irq-riscv-imsic-platform.c irqchip/riscv-imsic: Set irq_set_affinity() for IMSIC base 2025-05-29 11:02:46 +02:00
irq-riscv-imsic-state.c irqchip/riscv-imsic: Start local sync timer on correct CPU 2025-05-29 11:03:15 +02:00
irq-riscv-imsic-state.h irqchip/riscv-imsic: Separate next and previous pointers in IMSIC vector 2025-05-29 11:02:44 +02:00
irq-riscv-intc.c irqchip/riscv-intc: Fix SMP=n boot with ACPI 2024-10-15 23:14:25 +02:00
irq-sa11x0.c irqchip: Remove asmlinkage for handlers registered with set_handle_irq() 2024-07-30 13:35:49 +02:00
irq-sifive-plic.c irqchip/sifive-plic: Avoid interrupt ID 0 handling during suspend/resume 2025-10-19 16:34:05 +02:00
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/exiu: Fix acknowledgment of edge triggered interrupts 2022-05-04 16:33:17 +01:00
irq-sp7021-intc.c irqchip: Add Sunplus SP7021 interrupt controller driver 2022-07-08 14:23:57 +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: Add StarFive external interrupt controller 2024-02-26 15:09:18 +01:00
irq-stm32-exti.c irqchip/stm32-exti: Split MCU and MPU code 2024-06-23 19:49:45 +02:00
irq-stm32mp-exti.c irqchip/stm32mp-exti: Allow building as module 2024-06-24 00:16:43 +02:00
irq-sun4i.c irq: remove handle_domain_{irq,nmi}() 2021-10-26 10:13:31 +01:00
irq-sun6i-r.c minmax: don't use max() in situations that want a C constant expression 2024-07-28 20:23:27 -07:00
irq-sunxi-nmi.c irqchip/sunxi-nmi: Add missing SKIP_WAKE flag 2025-02-01 18:39:36 +01:00
irq-tb10x.c irqchip: Remove redundant irq_chip::name initialization 2024-03-25 17:38:29 +01:00
irq-tegra.c irqchip/tegra: Fix overflow implicit truncation warnings 2022-06-15 17:41:11 +02:00
irq-ti-sci-inta.c irqchip: Explicitly include correct DT includes 2023-08-21 17:49:11 +01:00
irq-ti-sci-intr.c irqchip: Explicitly include correct DT includes 2023-08-21 17:49:11 +01:00
irq-ts4800.c irqchip: Add missing MODULE_DESCRIPTION() macros 2024-06-23 17:23:08 +02:00
irq-uniphier-aidet.c irqchip: Explicitly include correct DT includes 2023-08-21 17:49:11 +01:00
irq-versatile-fpga.c irqchip: Remove asmlinkage for handlers registered with set_handle_irq() 2024-07-30 13:35:49 +02:00
irq-vf610-mscm-ir.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
irq-vic.c irqchip/vic: Fix a kernel-doc warning 2024-02-21 18:31:08 +01:00
irq-vt8500.c irq: remove handle_domain_{irq,nmi}() 2021-10-26 10:13:31 +01:00
irq-wpcm450-aic.c irqchip/wpcm450: Fix memory leak in wpcm450_aic_of_init() 2022-11-26 13:29:48 +00:00
irq-xilinx-intc.c irqchip/xilinx: Fix shift out of bounds 2024-08-10 10:39:24 +02:00
irq-xtensa-mx.c irqchip: irq-xtensa-mx: include header for missing prototype 2023-09-20 05:03:20 -07:00
irq-xtensa-pic.c irqchip/irq-xtensa-pic: Clean up 2023-12-12 15:45:39 +01:00
irq-zevio.c irq: remove handle_domain_{irq,nmi}() 2021-10-26 10:13:31 +01:00
irqchip.c irqchip: Plug a OF node reference leak in platform_irqchip_probe() 2025-01-23 17:23:02 +01:00
Kconfig irqchip: Build IMX_MU_MSI only on ARM 2025-08-15 12:14:07 +02:00
Makefile irqchip/loongarch-avec: Add AVEC irqchip support 2024-08-23 20:40:27 +02:00
qcom-irq-combiner.c irqchip: Bulk conversion to generic_handle_domain_irq() 2021-06-10 13:09:19 +01:00
qcom-pdc.c irqchip/qcom-pdc: Add support for v3.2 HW 2023-09-12 13:38:08 +01:00
spear-shirq.c irqchip/spear-shirq: Add support for IRQ 0..6 2021-12-16 13:29:44 +00:00