6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Alan Borzeszkowski <alan.borzeszkowski@xxxxxxxxxxxxxxx> commit eb9640fd1ce666610b77f5997596e9570a36378f upstream. Move setting irq_chip.name from probe() function to the initialization of "irq_chip" struct in order to fix vGPIO driver crash during bootup. Crash was caused by unauthorized modification of irq_chip.name field where irq_chip struct was initialized as const. This behavior is a consequence of suboptimal implementation of gpio_irq_chip_set_chip(), which should be changed to avoid casting away const qualifier. Crash log: BUG: unable to handle page fault for address: ffffffffc0ba81c0 /#PF: supervisor write access in kernel mode /#PF: error_code(0x0003) - permissions violation CPU: 33 UID: 0 PID: 1075 Comm: systemd-udevd Not tainted 6.12.0-rc6-00077-g2e1b3cc9d7f7 #1 Hardware name: Intel Corporation Kaseyville RP/Kaseyville RP, BIOS KVLDCRB1.PGS.0026.D73.2410081258 10/08/2024 RIP: 0010:gnr_gpio_probe+0x171/0x220 [gpio_graniterapids] Cc: stable@xxxxxxxxxxxxxxx Signed-off-by: Alan Borzeszkowski <alan.borzeszkowski@xxxxxxxxxxxxxxx> Signed-off-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx> Acked-by: Andy Shevchenko <andy@xxxxxxxxxx> Link: https://lore.kernel.org/r/20241204070415.1034449-2-mika.westerberg@xxxxxxxxxxxxxxx Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/gpio/gpio-graniterapids.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/gpio/gpio-graniterapids.c +++ b/drivers/gpio/gpio-graniterapids.c @@ -234,6 +234,7 @@ static int gnr_gpio_irq_set_type(struct } static const struct irq_chip gnr_gpio_irq_chip = { + .name = "gpio-graniterapids", .irq_ack = gnr_gpio_irq_ack, .irq_mask = gnr_gpio_irq_mask, .irq_unmask = gnr_gpio_irq_unmask, @@ -324,7 +325,6 @@ static int gnr_gpio_probe(struct platfor girq = &priv->gc.irq; gpio_irq_chip_set_chip(girq, &gnr_gpio_irq_chip); - girq->chip->name = dev_name(dev); girq->parent_handler = NULL; girq->num_parents = 0; girq->parents = NULL;
