BugLink: https://bugs.launchpad.net/bugs/2007581 Commit 5467801f1fcb ("gpio: Restrict usage of GPIO chip irq members before initialization") attempted to fix a race condition that lead to a NULL pointer, but in the process caused a regression for _AEI/_EVT declared GPIOs. This manifests in messages showing deferred probing while trying to allocate IRQs like so: amd_gpio AMDI0030:00: Failed to translate GPIO pin 0x0000 to IRQ, err -517 amd_gpio AMDI0030:00: Failed to translate GPIO pin 0x002C to IRQ, err -517 amd_gpio AMDI0030:00: Failed to translate GPIO pin 0x003D to IRQ, err -517 [ .. more of the same .. ] The code for walking _AEI doesn't handle deferred probing and so this leads to non-functional GPIO interrupts. Fix this issue by moving the call to `acpi_gpiochip_request_interrupts` to occur after gc->irc.initialized is set. Fixes: 5467801f1fcb ("gpio: Restrict usage of GPIO chip irq members before initialization") Link: https://lore.kernel.org/linux-gpio/BL1PR12MB51577A77F000A008AA694675E2EF9@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx/ Link: https://bugzilla.suse.com/show_bug.cgi?id=1198697 Link: https://bugzilla.kernel.org/show_bug.cgi?id=215850 Link: https://gitlab.freedesktop.org/drm/amd/-/issues/1979 Link: https://gitlab.freedesktop.org/drm/amd/-/issues/1976 Reported-by: Mario Limonciello <mario.limonciello@xxxxxxx> Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxx> Reviewed-by: Shreeya Patel <shreeya.patel@xxxxxxxxxxxxx> Tested-By: Samuel Čavoj <samuel@xxxxxxxxx> Tested-By: lukeluk498@xxxxxxxxx Link: Reviewed-by: Andy Shevchenko <andy.shevchenko@xxxxxxxxx> Acked-by: Linus Walleij <linus.walleij@xxxxxxxxxx> Reviewed-and-tested-by: Takashi Iwai <tiwai@xxxxxxx> Cc: Shreeya Patel <shreeya.patel@xxxxxxxxxxxxx> Cc: stable@xxxxxxxxxxxxxxx Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> (backported from commit 06fb4ecfeac7e00d6704fa5ed19299f2fefb3cc9) Signed-off-by: Asmaa Mnebhi <asmaa@xxxxxxxxxx> --- drivers/gpio/gpiolib.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index e4d47e00c392..049cdfc975b3 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -2329,8 +2329,6 @@ static int gpiochip_add_irqchip(struct gpio_chip *gpiochip, gpiochip_set_irq_hooks(gpiochip); - acpi_gpiochip_request_interrupts(gpiochip); - /* * Using barrier() here to prevent compiler from reordering * gc->irq.initialized before initialization of above @@ -2340,6 +2338,8 @@ static int gpiochip_add_irqchip(struct gpio_chip *gpiochip, gpiochip->irq.initialized = true; + acpi_gpiochip_request_interrupts(gpiochip); + return 0; } -- 2.30.1
