+static int __devinit fsl_msi_setup_hwirq(struct fsl_msi *msi,
+ struct platform_device *dev,
+ int offset, int irq_index)
+{
+ struct fsl_msi_cascade_data *cascade_data = NULL;
+ int virt_msir;
+
+ virt_msir = irq_of_parse_and_map(dev->dev.of_node, irq_index);
+ if (virt_msir == NO_IRQ) {
+ dev_err(&dev->dev, "%s: Cannot translate IRQ index %d\n",
+ __func__, irq_index);
+ return 0;
+ }
+
+ cascade_data = kzalloc(sizeof(struct fsl_msi_cascade_data), GFP_KERNEL);
+ if (!cascade_data) {
+ dev_err(&dev->dev, "No memory for MSI cascade data\n");
+ return -ENOMEM;
+ }
+
+ msi->msi_virqs[irq_index] = virt_msir;
+ cascade_data->index = offset + irq_index;
+ cascade_data->msi_data = msi;
+ set_irq_data(virt_msir, cascade_data);
+ set_irq_chained_handler(virt_msir, fsl_msi_cascade);
+
+ return 0;
+}
+