misc: microchip: pci1xxxx: Resolve kernel panic during GPIO IRQ handling

commit 194f9f94a5169547d682e9bbcc5ae6d18a564735 upstream.

Resolve kernel panic caused by improper handling of IRQs while
accessing GPIO values. This is done by replacing generic_handle_irq with
handle_nested_irq.

Fixes: 1f4d8ae231f4 ("misc: microchip: pci1xxxx: Add gpio irq handler and irq helper functions irq_ack, irq_mask, irq_unmask and irq_set_type of irq_chip.")
Cc: stable <stable@kernel.org>
Signed-off-by: Rengarajan S <rengarajan.s@microchip.com>
Link: https://lore.kernel.org/r/20241205133626.1483499-2-rengarajan.s@microchip.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_gpio.c b/drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_gpio.c
index 3389803cb281a7d598ab8dcb16e64373ba3da394..bd88e310e3e5e3c732490bfc2db1f5156b6a9ad4 100644 (file)
--- a/drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_gpio.c
+++ b/drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_gpio.c
@@ -273,7 +273,7 @@ static irqreturn_t pci1xxxx_gpio_irq_handler(int irq, void *dev_id)
                        writel(BIT(bit), priv->reg_base + INTR_STATUS_OFFSET(gpiobank));
                        spin_unlock_irqrestore(&priv->lock, flags);
                        irq = irq_find_mapping(gc->irq.domain, (bit + (gpiobank * 32)));
-                       generic_handle_irq(irq);
+                       handle_nested_irq(irq);
                }
        }
        spin_lock_irqsave(&priv->lock, flags);