qiuguorui1 47c8387a96 irqchip/stm32-exti: Avoid losing interrupts due to clearing pending bits by mistake ... commit e579076ac0 upstream. In the current code, when the eoi callback of the exti clears the pending bit of the current interrupt, it will first read the values of fpr and rpr, then logically OR the corresponding bit of the interrupt number, and finally write back to fpr and rpr. We found through experiments that if two exti interrupts, we call them int1/int2, arrive almost at the same time. in our scenario, the time difference is 30 microseconds, assuming int1 is triggered first. there will be an extreme scenario: both int's pending bit are set to 1, the irq handle of int1 is executed first, and eoi handle is then executed, at this moment, all pending bits are cleared, but the int 2 has not finally been reported to the cpu yet, which eventually lost int2. According to stm32's TRM description about rpr and fpr: Writing a 1 to this bit will trigger a rising edge event on event x, Writing 0 has no effect. Therefore, when clearing the pending bit, we only need to clear the pending bit of the irq. Fixes: 927abfc446 ("irqchip/stm32: Add stm32mp1 support with hierarchy domain") Signed-off-by: qiuguorui1 <qiuguorui1@huawei.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Cc: stable@vger.kernel.org # v4.18+ Link: https://lore.kernel.org/r/20200820031629.15582-1-qiuguorui1@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2020-09-03 11:27:06 +02:00
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Kconfig	irqchip: Place CONFIG_SIFIVE_PLIC into the menu	2020-01-23 08:22:55 +01:00
Makefile	irqchip: Add irq-ingenic-tcu driver	2019-08-08 15:30:07 -07:00
alphascale_asm9260-icoll.h	…
exynos-combiner.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
irq-al-fic.c	irqchip/al-fic: Add support for irq retrigger	2019-09-09 18:11:47 +01:00
irq-alpine-msi.c	…
irq-armada-370-xp.c	…
irq-aspeed-i2c-ic.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
irq-aspeed-vic.c	…
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	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
irq-ativic32.c	…
irq-atmel-aic-common.c	…
irq-atmel-aic-common.h	…
irq-atmel-aic.c	…
irq-atmel-aic5.c	irqchip/atmel-aic5: Add support for sam9x60 irqchip	2019-09-09 18:11:51 +01:00
irq-bcm2835.c	…
irq-bcm2836.c	…
irq-bcm6345-l1.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
irq-bcm7038-l1.c	irqchip/irq-bcm7038-l1: Enable parent IRQ if necessary	2020-01-04 19:17:21 +01:00
irq-bcm7120-l2.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
irq-brcmstb-l2.c	…
irq-clps711x.c	…
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	…
irq-csky-mpintc.c	Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2019-07-08 11:01:13 -07:00
irq-davinci-aintc.c	…
irq-davinci-cp-intc.c	…
irq-digicolor.c	…
irq-dw-apb-ictl.c	…
irq-eznps.c	…
irq-ftintc010.c	…
irq-gic-common.c	irqchip/gic: Skip DT quirks when evaluating IIDR-based quirks	2019-08-20 10:23:35 +01:00
irq-gic-common.h	irqchip/gic: Prepare for more than 16 PPIs	2019-08-20 10:23:34 +01:00
irq-gic-pm.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234	2019-06-19 17:09:07 +02:00
irq-gic-realview.c	…
irq-gic-v2m.c	irqchip/gic-v2m: Register the frame's PA instead of its VA in fwnode	2019-08-07 14:24:37 +01:00
irq-gic-v3-its-fsl-mc-msi.c	…
irq-gic-v3-its-pci-msi.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234	2019-06-19 17:09:07 +02:00
irq-gic-v3-its-platform-msi.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234	2019-06-19 17:09:07 +02:00
irq-gic-v3-its.c	genirq/affinity: Make affinity setting if activated opt-in	2020-08-21 13:05:20 +02:00
irq-gic-v3-mbi.c	…
irq-gic-v3.c	irqchip/gic-v3: Only provision redistributors that are enabled in ACPI	2020-02-24 08:36:59 +01:00
irq-gic-v4.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234	2019-06-19 17:09:07 +02:00
irq-gic.c	irqchip/gic: Atomically update affinity	2020-07-09 09:37:56 +02:00
irq-goldfish-pic.c	…
irq-hip04.c	irqchip/gic: Prepare for more than 16 PPIs	2019-08-20 10:23:34 +01:00
irq-i8259.c	…
irq-imgpdc.c	irqchip: Remove dev_err() usage after platform_get_irq()	2019-08-20 10:35:55 +01:00
irq-imx-gpcv2.c	irqchip fixes for 5.3	2019-08-01 20:21:00 +02:00
irq-imx-irqsteer.c	…
irq-ingenic-tcu.c	irqchip: Add irq-ingenic-tcu driver	2019-08-08 15:30:07 -07:00
irq-ingenic.c	irqchip: ingenic: Error out if IRQ domain creation failed	2020-01-04 19:17:22 +01:00
irq-ixp4xx.c	irqchip/ixp4xx: Register the base PA instead of its VA in fwnode	2019-08-07 14:24:41 +01:00
irq-jcore-aic.c	…
irq-keystone.c	irqchip: Remove dev_err() usage after platform_get_irq()	2019-08-20 10:35:55 +01:00
irq-lpc32xx.c	…
irq-ls-scfg-msi.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
irq-ls1x.c	…
irq-madera.c	…
irq-mbigen.c	irqchip/mbigen: Free msi_desc on device teardown	2020-04-23 10:36:20 +02:00
irq-meson-gpio.c	irqchip/meson-gpio: Add support for meson sm1 SoCs	2019-08-30 15:01:06 +01:00
irq-mips-cpu.c	…
irq-mips-gic.c	…
irq-mmp.c	irqchip/mmp: Coexist with GIC root IRQ controller	2019-08-30 15:23:30 +01:00
irq-mscc-ocelot.c	…
irq-mtk-cirq.c	…
irq-mtk-sysirq.c	irqchip/irq-mtk-sysirq: Replace spinlock with raw_spinlock	2020-08-19 08:16:02 +02:00
irq-mvebu-gicp.c	…
irq-mvebu-icu.c	…
irq-mvebu-odmi.c	…
irq-mvebu-pic.c	…
irq-mvebu-sei.c	…
irq-mxs.c	…
irq-nvic.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
irq-omap-intc.c	…
irq-ompic.c	…
irq-or1k-pic.c	…
irq-orion.c	…
irq-partition-percpu.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234	2019-06-19 17:09:07 +02:00
irq-pic32-evic.c	…
irq-rda-intc.c	…
irq-renesas-h8s.c	…
irq-renesas-h8300h.c	…
irq-renesas-intc-irqpin.c	irqchip/renesas-intc-irqpin: Use proper irq_chip name and parent	2019-06-11 12:22:42 +01:00
irq-renesas-irqc.c	irqchip/renesas-irqc: Use proper irq_chip name and parent	2019-06-11 12:22:42 +01:00
irq-renesas-rza1.c	irqchip/renesas-rza1: Fix an use-after-free in rza1_irqc_probe()	2019-07-26 14:40:01 +01:00
irq-s3c24xx.c	…
irq-sa11x0.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
irq-sifive-plic.c	irqchip updates for 5.4, take 2	2019-10-25 14:25:15 +02:00
irq-sirfsoc.c	…
irq-sni-exiu.c	Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2019-07-08 11:01:13 -07:00
irq-st.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
irq-stm32-exti.c	irqchip/stm32-exti: Avoid losing interrupts due to clearing pending bits by mistake	2020-09-03 11:27:06 +02:00
irq-sun4i.c	…
irq-sunxi-nmi.c	…
irq-tango.c	…
irq-tb10x.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 333	2019-06-05 17:37:06 +02:00
irq-tegra.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 282	2019-06-05 17:36:37 +02:00
irq-ti-sci-inta.c	irqchip/ti-sci-inta: Fix return value about devm_ioremap_resource()	2020-08-19 08:15:58 +02:00
irq-ti-sci-intr.c	…
irq-ts4800.c	…
irq-uniphier-aidet.c	irqchip/uniphier-aidet: Use devm_platform_ioremap_resource()	2019-09-05 09:28:13 +01:00
irq-versatile-fpga.c	irqchip/versatile-fpga: Apply clear-mask earlier	2020-04-17 10:50:11 +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	…
irq-vt8500.c	…
irq-xilinx-intc.c	…
irq-xtensa-mx.c	…
irq-xtensa-pic.c	…
irq-zevio.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
irqchip.c	…
qcom-irq-combiner.c	irqchip: Remove dev_err() usage after platform_get_irq()	2019-08-20 10:35:55 +01:00
qcom-pdc.c	…
spear-shirq.c	…