genirq/msi: Remove unused MSI_FLAG_IDENTITY_MAP

No user and we definitely don't want to grow one.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: linux-block@vger.kernel.org
Cc: linux-pci@vger.kernel.org
Cc: linux-nvme@lists.infradead.org
Cc: axboe@fb.com
Cc: agordeev@redhat.com
Link: http://lkml.kernel.org/r/1467621574-8277-2-git-send-email-hch@lst.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

2 files changed, 4 insertions, 10 deletions

diff --git a/include/linux/msi.h b/include/linux/msi.h
index 8b425c66305a..c33abfa0f5a7 100644
--- a/include/linux/msi.h
+++ b/include/linux/msi.h
@@ -264,12 +264,10 @@ enum {
          * callbacks.
          */
         MSI_FLAG_USE_DEF_CHIP_OPS       = (1 << 1),
-        /* Build identity map between hwirq and irq */
-        MSI_FLAG_IDENTITY_MAP           = (1 << 2),
         /* Support multiple PCI MSI interrupts */
-        MSI_FLAG_MULTI_PCI_MSI          = (1 << 3),
+        MSI_FLAG_MULTI_PCI_MSI          = (1 << 2),
         /* Support PCI MSIX interrupts */
-        MSI_FLAG_PCI_MSIX               = (1 << 4),
+        MSI_FLAG_PCI_MSIX               = (1 << 3),
 };
 
 int msi_domain_set_affinity(struct irq_data *data, const struct cpumask *mask,
diff --git a/kernel/irq/msi.c b/kernel/irq/msi.c
index 38e89ce7b071..eb5bf2b50b07 100644
--- a/kernel/irq/msi.c
+++ b/kernel/irq/msi.c
@@ -324,7 +324,7 @@ int msi_domain_alloc_irqs(struct irq_domain *domain, struct device *dev,
         struct msi_domain_ops *ops = info->ops;
         msi_alloc_info_t arg;
         struct msi_desc *desc;
-        int i, ret, virq = -1;
+        int i, ret, virq;
 
         ret = msi_domain_prepare_irqs(domain, dev, nvec, &arg);
         if (ret)
@@ -332,12 +332,8 @@ int msi_domain_alloc_irqs(struct irq_domain *domain, struct device *dev,
 
         for_each_msi_entry(desc, dev) {
                 ops->set_desc(&arg, desc);
-                if (info->flags & MSI_FLAG_IDENTITY_MAP)
-                        virq = (int)ops->get_hwirq(info, &arg);
-                else
-                        virq = -1;
 
-                virq = __irq_domain_alloc_irqs(domain, virq, desc->nvec_used,
+                virq = __irq_domain_alloc_irqs(domain, -1, desc->nvec_used,
                                                dev_to_node(dev), &arg, false);
                 if (virq < 0) {
                         ret = -ENOSPC;