pci: intr_remap: Use irq_data

No need to dereference irq_desc.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>

diff --git a/drivers/pci/intr_remapping.c b/drivers/pci/intr_remapping.c
index 87ec390..cb62529 100644 (file)
--- a/drivers/pci/intr_remapping.c
+++ b/drivers/pci/intr_remapping.c
@@ -54,45 +54,22 @@ struct irq_2_iommu {
 };
 
 #ifdef CONFIG_GENERIC_HARDIRQS
-static struct irq_2_iommu *get_one_free_irq_2_iommu(int node)
-{
-       struct irq_2_iommu *iommu;
-
-       iommu = kzalloc_node(sizeof(*iommu), GFP_ATOMIC, node);
-       printk(KERN_DEBUG "alloc irq_2_iommu on node %d\n", node);
-
-       return iommu;
-}
-
 static struct irq_2_iommu *irq_2_iommu(unsigned int irq)
 {
-       struct irq_desc *desc;
-
-       desc = irq_to_desc(irq);
-
-       if (WARN_ON_ONCE(!desc))
-               return NULL;
-
-       return desc->irq_2_iommu;
+       return get_irq_iommu(irq);
 }
 
 static struct irq_2_iommu *irq_2_iommu_alloc(unsigned int irq)
 {
-       struct irq_desc *desc;
-       struct irq_2_iommu *irq_iommu;
+       struct irq_data *data = irq_get_irq_data(irq);
 
-       desc = irq_to_desc(irq);
-       if (!desc) {
-               printk(KERN_INFO "can not get irq_desc for %d\n", irq);
-               return NULL;
-       }
-
-       irq_iommu = desc->irq_2_iommu;
-
-       if (!irq_iommu)
-               desc->irq_2_iommu = get_one_free_irq_2_iommu(irq_node(irq));
+       if (WARN_ONCE(data->irq_2_iommu,
+                     KERN_DEBUG "irq_2_iommu!=NULL irq %u\n", irq))
+               return data->irq_2_iommu;
 
-       return desc->irq_2_iommu;
+       data->irq_2_iommu = kzalloc_node(sizeof(*data->irq_2_iommu),
+                                        GFP_ATOMIC, data->node);
+       return data->irq_2_iommu;
 }
 
 static void irq_2_iommu_free(unsigned int irq)