octeon_i2c_isr
irqreturn_t octeon_i2c_isr(int irq, void *dev_id);
octeon_i2c_isr, 0, DRV_NAME, i2c);
ret = devm_request_irq(dev, pci_irq_vector(pdev, 0), octeon_i2c_isr, 0,