Use 'mapped_irq' instead of the undefined 'irq' variable in altera_gpio_probe(). The incorrect variable name causes the driver to fail to build with an 'irq' undeclared error. Fixes: 6e6e585b603e4 ("gpio: altera: Handle errors from optional IRQ lookup") Reported-by: Mark Brown <broonie@kernel.org> Closes: https://lore.kernel.org/all/apgNYDiSiPmNZspF@sirena.org.uk/ Signed-off-by: bui duc phuc <phucduc.bui@gmail.com> Link: https://patch.msgid.link/20260903030700.132068-1-phucduc.bui@gmail.com Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>