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linux-yocto/drivers/gpio
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Emanuele Ghidoli 262e32568a gpio: pca953x: fix IRQ storm on system wake up 
[ Upstream commit 3e38f946062b4845961ab86b726651b4457b2af8 ]

If an input changes state during wake-up and is used as an interrupt
source, the IRQ handler reads the volatile input register to clear the
interrupt mask and deassert the IRQ line. However, the IRQ handler is
triggered before access to the register is granted, causing the read
operation to fail.

As a result, the IRQ handler enters a loop, repeatedly printing the
"failed reading register" message, until `pca953x_resume()` is eventually
called, which restores the driver context and enables access to
registers.

Fix by disabling the IRQ line before entering suspend mode, and
re-enabling it after the driver context is restored in `pca953x_resume()`.

An IRQ can be disabled with disable_irq() and still wake the system as
long as the IRQ has wake enabled, so the wake-up functionality is
preserved.

Fixes: b765743005 ("gpio: pca953x: Restore registers after suspend/resume cycle")
Cc: stable@vger.kernel.org
Signed-off-by: Emanuele Ghidoli <emanuele.ghidoli@toradex.com>
Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20250512095441.31645-1-francesco@dolcini.it
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2025-06-04 14:40:01 +02:00
..
gpio-74x164.c gpio: 74x164: Enable output pins after registers are reset 2024-03-06 14:45:19 +00:00
gpio-74xx-mmio.c gpio: 74xx-mmio: Use bits instead of plain numbers for flags 2022-07-28 15:47:56 +02:00
gpio-104-dio-48e.c gpio updates for v6.1-rc1 2022-10-08 09:46:29 -07:00
gpio-104-idi-48.c gpio updates for v6.1-rc1 2022-10-08 09:46:29 -07:00
gpio-104-idio-16.c gpio updates for v6.1-rc1 2022-10-08 09:46:29 -07:00
gpio-adnp.c gpio: adnp: Make use of device properties 2022-07-19 09:57:13 +02:00
gpio-adp5520.c
gpio-aggregator.c gpio: aggregator: protect driver attr handlers against module unload 2025-03-13 12:53:12 +01:00
gpio-altera-a10sr.c gpio: altera-a10sr: Switch to use fwnode instead of of_node 2022-01-24 17:23:15 +02:00
gpio-altera.c gpio: Bulk conversion to generic_handle_domain_irq() 2021-08-12 11:39:38 +01:00
gpio-amd-fch.c
gpio-amd8111.c gpio: amd8111: Fix PCI device reference count leak 2022-11-30 17:18:35 +01:00
gpio-amdpt.c gpio: use raw spinlock for gpio chip shadowed data 2022-04-25 12:10:02 +02:00
gpio-arizona.c gpio: Propagate firmware node from a parent device 2021-12-17 17:50:46 +01:00
gpio-aspeed-sgpio.c gpio updates for v5.17 2022-01-11 12:31:35 -08:00
gpio-aspeed.c gpio: aspeed: Use devm_clk api to manage clock source 2024-10-17 15:22:21 +02:00
gpio-ath79.c gpio: Bulk conversion to generic_handle_domain_irq() 2021-08-12 11:39:38 +01:00
gpio-bcm-kona.c gpio: bcm-kona: Add missing newline to dev_err format string 2025-02-21 13:49:58 +01:00
gpio-bd9571mwv.c
gpio-bd71815.c
gpio-bd71828.c gpio: Get rid of duplicate of_node assignment in the drivers 2021-12-17 17:39:35 +01:00
gpio-brcmstb.c gpio: updates for v6.0-rc1 2022-08-04 18:34:05 -07:00
gpio-bt8xx.c
gpio-cadence.c gpio: use raw spinlock for gpio chip shadowed data 2022-04-25 12:10:02 +02:00
gpio-clps711x.c
gpio-creg-snps.c gpio: Setup parent device and get rid of unnecessary of_node assignment 2021-12-17 17:44:19 +01:00
gpio-crystalcove.c gpio: crystalcove: Use -ENOTSUPP consistently 2024-05-17 11:56:09 +02:00
gpio-cs5535.c
gpio-da9052.c
gpio-da9055.c
gpio-davinci.c gpio: davinci: fix lazy disable 2024-10-17 15:22:02 +02:00
gpio-dln2.c gpio: dln2: make irq_chip immutable 2022-06-06 14:09:16 +03:00
gpio-dwapb.c gpio: dwapb: mask/unmask IRQ when disable/enale it 2024-01-01 12:39:07 +00:00
gpio-eic-sprd.c gpio: eic-sprd: Clear interrupt after set the interrupt type 2024-01-31 16:17:11 -08:00
gpio-em.c gpio: Get rid of duplicate of_node assignment in the drivers 2021-12-17 17:39:35 +01:00
gpio-en7523.c gpio: Add support for Airoha EN7523 GPIO controller 2022-02-02 10:16:19 +01:00
gpio-ep93xx.c gpio: ep93xx: Fix port F hwirq numbers in handler 2023-02-01 08:34:47 +01:00
gpio-exar.c gpio: exar: set value when external pull-up or pull-down is present 2024-12-14 19:54:01 +01:00
gpio-f7188x.c gpio-f7188x: fix chip name and pin count on Nuvoton chip 2023-06-05 09:26:18 +02:00
gpio-ftgpio010.c gpio: ftgpio010: Make irqchip immutable 2022-09-20 16:10:53 +02:00
gpio-ge.c gpio: Get rid of duplicate of_node assignment in the drivers 2021-12-17 17:39:35 +01:00
gpio-gpio-mm.c gpio: gpio-mm: Implement and utilize register structures 2022-07-20 17:44:47 +02:00
gpio-grgpio.c gpio: grgpio: Add NULL check in grgpio_probe 2024-12-14 19:54:24 +01:00
gpio-gw-pld.c gpio: Remove unused local OF node pointers 2021-12-22 10:05:26 +01:00
gpio-hisi.c gpio: Bulk conversion to generic_handle_domain_irq() 2021-08-12 11:39:38 +01:00
gpio-hlwd.c gpio: use raw spinlock for gpio chip shadowed data 2022-04-25 12:10:02 +02:00
gpio-htc-egpio.c
gpio-i8255.c gpio: i8255: Introduce the Intel 8255 interface library module 2022-07-20 17:44:36 +02:00
gpio-i8255.h gpio: i8255: Introduce the Intel 8255 interface library module 2022-07-20 17:44:36 +02:00
gpio-ich.c
gpio-idt3243x.c gpio: use raw spinlock for gpio chip shadowed data 2022-04-25 12:10:02 +02:00
gpio-imx-scu.c gpio: imx-scu: add imx-scu GPIO driver 2022-08-31 17:21:23 +02:00
gpio-iop.c
gpio-it87.c
gpio-ixp4xx.c gpio: ixp4xx: Make irqchip immutable 2022-09-13 16:17:45 +02:00
gpio-janz-ttl.c
gpio-kempld.c
gpio-logicvc.c
gpio-loongson.c
gpio-loongson1.c gpio: use raw spinlock for gpio chip shadowed data 2022-04-25 12:10:02 +02:00
gpio-lp873x.c treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_319.RULE 2022-06-10 14:51:36 +02:00
gpio-lp3943.c gpio: lp3943: unsigned to unsigned int cleanup 2022-07-19 09:57:40 +02:00
gpio-lp87565.c treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_319.RULE 2022-06-10 14:51:36 +02:00
gpio-lpc18xx.c
gpio-lpc32xx.c gpio: Setup parent device and get rid of unnecessary of_node assignment 2021-12-17 17:44:19 +01:00
gpio-madera.c
gpio-max730x.c gpio: max730x: Make __max730x_remove() return void 2021-10-13 19:52:26 +02:00
gpio-max732x.c gpio: max732x: Drop unused support for irq and setup code via platform data 2022-05-05 14:37:17 +02:00
gpio-max3191x.c spi: make remove callback a void function 2022-02-09 13:00:45 +00:00
gpio-max7300.c i2c: Make remove callback return void 2022-08-16 12:46:26 +02:00
gpio-max7301.c spi: make remove callback a void function 2022-02-09 13:00:45 +00:00
gpio-max77620.c gpio: max77620: Make the irqchip immutable 2022-05-05 14:56:37 +02:00
gpio-max77650.c
gpio-mb86s7x.c
gpio-mc33880.c spi: make remove callback a void function 2022-02-09 13:00:45 +00:00
gpio-menz127.c gpio: use raw spinlock for gpio chip shadowed data 2022-04-25 12:10:02 +02:00
gpio-merrifield.c gpio: merrifield: make irq_chip immutable 2022-06-06 14:09:16 +03:00
gpio-ml-ioh.c gpio: ml-ioh: Convert to use managed functions pcim* and devm_* 2022-05-20 19:20:35 +02:00
gpio-mlxbf.c
gpio-mlxbf2.c gpio: mlxbf2: Use generic_handle_irq_safe() 2022-09-19 15:08:38 +02:00
gpio-mm-lantiq.c
gpio-mmio.c gpio: use raw spinlock for gpio chip shadowed data 2022-04-25 12:10:02 +02:00
gpio-mockup.c gpio: mockup: Fix mode of debugfs files 2023-05-30 14:03:18 +01:00
gpio-moxtet.c
gpio-mpc8xxx.c gpio: mpc8xxx: Fix support for IRQ_TYPE_LEVEL_LOW flow_type in mpc85xx 2022-09-07 13:17:23 +02:00
gpio-mpc5200.c
gpio-msc313.c gpio: Remove dynamic allocation from populate_parent_alloc_arg() 2022-07-10 09:30:00 +01:00
gpio-mt7621.c gpio updates for v6.1-rc1 2022-10-08 09:46:29 -07:00
gpio-mvebu.c gpio: mvebu: fix irq domain leak 2023-08-03 10:23:49 +02:00
gpio-mxc.c gpio: mxc: remove dead code after switch to DT-only 2025-02-21 13:49:21 +01:00
gpio-mxs.c gpio: mxs: Fix header comment 2022-06-23 23:18:13 +02:00
gpio-octeon.c
gpio-omap.c gpio: omap: Move PM device over to irq domain 2022-02-09 13:36:53 +00:00
gpio-palmas.c gpio: Get rid of duplicate of_node assignment in the drivers 2021-12-17 17:39:35 +01:00
gpio-pca953x.c gpio: pca953x: fix IRQ storm on system wake up 2025-06-04 14:40:01 +02:00
gpio-pca9570.c gpio: pca9570: add pca9571 support 2022-07-19 09:57:13 +02:00
gpio-pcf857x.c i2c: Make remove callback return void 2022-08-16 12:46:26 +02:00
gpio-pch.c gpio: pch: Change PCI device macros 2022-06-21 18:01:11 +03:00
gpio-pci-idio-16.c gpio: Bulk conversion to generic_handle_domain_irq() 2021-08-12 11:39:38 +01:00
gpio-pcie-idio-24.c gpio: Bulk conversion to generic_handle_domain_irq() 2021-08-12 11:39:38 +01:00
gpio-pisosr.c treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_319.RULE 2022-06-10 14:51:36 +02:00
gpio-pl061.c gpio: pl061: Make the irqchip immutable 2022-04-19 15:22:26 +01:00
gpio-pmic-eic-sprd.c gpio: pmic-eic-sprd: Add can_sleep flag for PMIC EIC chip 2023-10-06 14:56:50 +02:00
gpio-pxa.c gpio: pxa: disable pinctrl calls for MMP_GPIO 2023-10-10 22:00:45 +02:00
gpio-raspberrypi-exp.c gpio: Get rid of duplicate of_node assignment in the drivers 2021-12-17 17:39:35 +01:00
gpio-rc5t583.c
gpio-rcar.c gpio: rcar: Fix missing of_node_put() call 2025-03-13 12:53:19 +01:00
gpio-rda.c gpio: Remove unused local OF node pointers 2021-12-22 10:05:26 +01:00
gpio-rdc321x.c
gpio-realtek-otto.c gpio: realtek-otto: switch to 32-bit I/O 2022-08-31 17:46:30 +02:00
gpio-reg.c
gpio-regmap.c gpio: regmap: Switch to use fwnode instead of of_node 2021-12-23 17:14:19 +01:00
gpio-rockchip.c gpio: rockchip: fix OF node leak in probe() 2024-09-12 11:10:29 +02:00
gpio-sa1100.c
gpio-sama5d2-piobu.c gpio: Get rid of duplicate of_node assignment in the drivers 2021-12-17 17:39:35 +01:00
gpio-sch.c gpio: sch: make irq_chip immutable 2022-06-06 14:09:16 +03:00
gpio-sch311x.c
gpio-sifive.c gpio: sifive: add missing check for platform_get_irq 2023-06-28 11:12:34 +02:00
gpio-sim.c gpio: sim: pass the GPIO device's software node to irq domain 2023-08-30 16:11:13 +02:00
gpio-siox.c
gpio-sl28cpld.c
gpio-sodaville.c gpio: Bulk conversion to generic_handle_domain_irq() 2021-08-12 11:39:38 +01:00
gpio-spear-spics.c treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_56.RULE (part 2) 2022-06-10 14:51:35 +02:00
gpio-sprd.c gpio: Get rid of duplicate of_node assignment in the drivers 2021-12-17 17:39:35 +01:00
gpio-sta2x11.c gpio: sta2x11: fix typo in a comment 2021-12-17 12:26:13 +01:00
gpio-stmpe.c gpio: stmpe: Check return value of stmpe_reg_read in stmpe_gpio_irq_sync_unlock 2025-02-21 13:50:05 +01:00
gpio-stp-xway.c
gpio-syscon.c gpio: syscon: Remove usage of syscon_regmap_lookup_by_compatible 2022-05-02 10:41:33 +02:00
gpio-tb10x.c gpio: tb10x: Fix an error handling path in tb10x_gpio_probe() 2023-10-06 14:56:43 +02:00
gpio-tc3589x.c gpio: tc3589x: Make irqchip immutable 2022-10-03 20:56:46 +02:00
gpio-tegra.c gpio: tegra: Convert to immutable irq chip 2022-10-20 13:47:54 +02:00
gpio-tegra186.c gpio: tegra186: fix resource handling in ACPI probe path 2025-04-25 10:43:44 +02:00
gpio-thunderx.c gpio: thunderx: Don't directly include asm-generic/msi.h 2022-07-11 09:15:58 +01:00
gpio-timberdale.c gpio: timberdale: Fix potential deadlock on &tgpio->lock 2023-10-25 12:03:09 +02:00
gpio-tn48m.c gpio: Add Delta TN48M CPLD GPIO driver 2022-02-25 09:59:35 +01:00
gpio-tpic2810.c i2c: Make remove callback return void 2022-08-16 12:46:26 +02:00
gpio-tps6586x.c gpio: Propagate firmware node from a parent device 2021-12-17 17:50:46 +01:00
gpio-tps65086.c
gpio-tps65218.c gpio: Get rid of duplicate of_node assignment in the drivers 2021-12-17 17:39:35 +01:00
gpio-tps65910.c gpio: Propagate firmware node from a parent device 2021-12-17 17:50:46 +01:00
gpio-tps65912.c
gpio-tps68470.c gpio: tps68470: Make tps68470_gpio_output() always set the initial value 2023-08-03 10:23:48 +02:00
gpio-tqmx86.c gpio: tqmx86: fix broken IRQ_TYPE_EDGE_BOTH interrupt type 2024-06-21 14:35:49 +02:00
gpio-ts4800.c treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_56.RULE (part 2) 2022-06-10 14:51:35 +02:00
gpio-ts4900.c gpio fixes for v5.18-rc1 2022-04-01 10:26:09 -07:00
gpio-ts5500.c gpio: ts5500: Fix Links to Technologic Systems web resources 2022-03-31 16:44:57 +02:00
gpio-twl4030.c gpio: twl4030: Reorder functions which allows to drop a forward declaraion 2022-09-20 09:02:08 +02:00
gpio-twl6040.c gpio: Propagate firmware node from a parent device 2021-12-17 17:50:46 +01:00
gpio-ucb1400.c gpio: ucb1400: Use proper header 2022-08-31 13:37:32 +02:00
gpio-uniphier.c gpio updates for v5.16 2021-11-08 11:55:21 -08:00
gpio-vf610.c gpio: vf610: mask the gpio irq in system suspend and support wakeup 2023-10-25 12:03:16 +02:00
gpio-viperboard.c gpio: viperboard: remove platform_set_drvdata() call in probe 2021-08-31 11:29:28 +02:00
gpio-virtio.c virtio: wrap config->reset calls 2022-01-14 18:50:52 -05:00
gpio-visconti.c gpio: Remove dynamic allocation from populate_parent_alloc_arg() 2022-07-10 09:30:00 +01:00
gpio-vx855.c
gpio-wcd934x.c
gpio-wcove.c gpio: wcove: Use -ENOTSUPP consistently 2024-05-17 11:56:09 +02:00
gpio-winbond.c gpio: winbond: Fix error code in winbond_gpio_get() 2022-06-23 16:29:55 +02:00
gpio-wm831x.c gpio: Propagate firmware node from a parent device 2021-12-17 17:50:46 +01:00
gpio-wm8350.c
gpio-wm8994.c
gpio-ws16c48.c gpio: ws16c48: Fix off-by-one error in WS16C48 resource region extent 2023-08-16 18:27:29 +02:00
gpio-xgene-sb.c
gpio-xgene.c
gpio-xgs-iproc.c gpio: xgs-iproc: Drop if with an always false condition 2022-07-19 09:57:13 +02:00
gpio-xilinx.c gpio: xilinx: remove excess kernel doc 2025-02-21 13:49:54 +01:00
gpio-xlp.c gpio: xlp: Fix build errors from Netlogic XLP removal 2021-12-03 16:00:40 +01:00
gpio-xra1403.c
gpio-xtensa.c
gpio-zevio.c gpio: zevio: drop of_gpio.h header 2022-05-14 14:41:21 +02:00
gpio-zynq.c gpio: zynq: Fix wakeup source leaks on device unbind 2025-04-25 10:43:44 +02:00
gpio-zynqmp-modepin.c gpio: modepin: Enable module autoloading 2024-09-12 11:10:29 +02:00
gpiolib-acpi.c gpiolib: acpi: Add a quirk for Acer Nitro ANV14 2025-02-21 13:50:05 +01:00
gpiolib-acpi.h gpiolib: acpi: Add wake_capable variants of acpi_dev_gpio_irq_get 2022-10-04 15:41:12 +02:00
gpiolib-cdev.c gpiolib: cdev: Fix use after free in lineinfo_changed_notify 2025-01-23 17:17:14 +01:00
gpiolib-cdev.h
gpiolib-devres.c gpiolib: devres: Get rid of unused devm_gpio_free() 2022-07-19 09:56:34 +02:00
gpiolib-legacy.c
gpiolib-of.c gpiolib: fix OOB access in quirk callbacks 2022-09-20 08:30:57 +02:00
gpiolib-of.h
gpiolib-sysfs.c gpiolib: sysfs: Fix error handling on failed export 2023-12-13 18:39:24 +01:00
gpiolib-sysfs.h
gpiolib.c gpio: prevent potential speculation leaks in gpio_device_get_desc() 2024-09-30 16:23:55 +02:00
gpiolib.h gpiolib: protect the GPIO device against being dropped while in use by user-space 2022-12-31 13:32:42 +01:00
Kconfig gpio: tqmx86: fix typo in Kconfig label 2024-06-21 14:35:48 +02:00
Makefile Input updates for 6.1 merge window: 2022-10-11 10:53:25 -07:00
TODO gpio: Update TODO to mention immutable irq_chip structures 2022-04-19 15:22:26 +01:00