[SPARC64]: Stop using __do_IRQ().

Invoke the desc->handle_irq directly in the top-level dispatch,
just like other sophisticated ports.

This will allow us to decrease the cost of the MSI queue dispatch.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 11 insertions, 3 deletions

diff --git a/arch/sparc64/kernel/pci_msi.c b/arch/sparc64/kernel/pci_msi.c
index 31a165fd3e48..d6d64b44af63 100644
--- a/arch/sparc64/kernel/pci_msi.c
+++ b/arch/sparc64/kernel/pci_msi.c
@@ -28,8 +28,15 @@ static irqreturn_t sparc64_msiq_interrupt(int irq, void *cookie)
                 unsigned long msi;
 
                 err = ops->dequeue_msi(pbm, msiqid, &head, &msi);
-                if (likely(err > 0))
-                        __do_IRQ(pbm->msi_irq_table[msi - pbm->msi_first]);
+                if (likely(err > 0)) {
+                        struct irq_desc *desc;
+                        unsigned int virt_irq;
+
+                        virt_irq = pbm->msi_irq_table[msi - pbm->msi_first];
+                        desc = irq_desc + virt_irq;
+
+                        desc->handle_irq(virt_irq, desc);
+                }
 
                 if (unlikely(err < 0))
                         goto err_dequeue;
@@ -128,7 +135,8 @@ int sparc64_setup_msi_irq(unsigned int *virt_irq_p,
         if (!*virt_irq_p)
                 goto out_err;
 
-        set_irq_chip(*virt_irq_p, &msi_irq);
+        set_irq_chip_and_handler_name(*virt_irq_p, &msi_irq,
+                                      handle_simple_irq, "MSI");
 
         err = alloc_msi(pbm);
         if (unlikely(err < 0))