From: Fabien Dessenne fabien.dessenne@foss.st.com
commit a1d4ef1adf8bbd302067534ead671a94759687ed upstream.
To act as an interrupt controller, a gpio bank relies on the "interrupt-parent" of the pin controller. When this optional "interrupt-parent" misses, do not create any IRQ domain.
This fixes a "NULL pointer in stm32_gpio_domain_alloc()" kernel crash when the interrupt-parent = <exti> property is not declared in the Device Tree.
Fixes: 0eb9f683336d ("pinctrl: Add IRQ support to STM32 gpios") Signed-off-by: Fabien Dessenne fabien.dessenne@foss.st.com Link: https://lore.kernel.org/r/20220627142350.742973-1-fabien.dessenne@foss.st.co... Signed-off-by: Linus Walleij linus.walleij@linaro.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/pinctrl/stm32/pinctrl-stm32.c | 20 ++++++++++++-------- 1 file changed, 12 insertions(+), 8 deletions(-)
--- a/drivers/pinctrl/stm32/pinctrl-stm32.c +++ b/drivers/pinctrl/stm32/pinctrl-stm32.c @@ -1215,15 +1215,17 @@ static int stm32_gpiolib_register_bank(s bank->bank_ioport_nr = bank_ioport_nr; spin_lock_init(&bank->lock);
- /* create irq hierarchical domain */ - bank->fwnode = of_node_to_fwnode(np); + if (pctl->domain) { + /* create irq hierarchical domain */ + bank->fwnode = of_node_to_fwnode(np); + + bank->domain = irq_domain_create_hierarchy(pctl->domain, 0, STM32_GPIO_IRQ_LINE, + bank->fwnode, &stm32_gpio_domain_ops, + bank);
- bank->domain = irq_domain_create_hierarchy(pctl->domain, 0, - STM32_GPIO_IRQ_LINE, bank->fwnode, - &stm32_gpio_domain_ops, bank); - - if (!bank->domain) - return -ENODEV; + if (!bank->domain) + return -ENODEV; + }
err = gpiochip_add_data(&bank->gpio_chip, bank); if (err) { @@ -1393,6 +1395,8 @@ int stm32_pctl_probe(struct platform_dev pctl->domain = stm32_pctrl_get_irq_domain(np); if (IS_ERR(pctl->domain)) return PTR_ERR(pctl->domain); + if (!pctl->domain) + dev_warn(dev, "pinctrl without interrupt support\n");
/* hwspinlock is optional */ hwlock_id = of_hwspin_lock_get_id(pdev->dev.of_node, 0);