Drivers: hv: vmbus: Use the new infrastructure for delivering VMBUS interrupts

Use the infrastructure for delivering VMBUS interrupts using a
special vector. With this patch, we can now properly handle
the VMBUS interrupts that can be delivered on any CPU. Also,
turn on interrupt load balancing as well.

This patch requires the infrastructure that was implemented in the patch:
X86: Handle Hyper-V vmbus interrupts as special hypervisor interrupts

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 7 insertions, 4 deletions

diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index cf19dfa5ead1..bf421e0efa1e 100644
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -36,6 +36,7 @@
 #include <linux/kernel_stat.h>
 #include <asm/hyperv.h>
 #include <asm/hypervisor.h>
+#include <asm/mshyperv.h>
 #include "hyperv_vmbus.h"
 
 
@@ -528,7 +529,6 @@ static void vmbus_flow_handler(unsigned int irq, struct irq_desc *desc)
 static int vmbus_bus_init(int irq)
 {
         int ret;
-        unsigned int vector;
 
         /* Hypervisor initialization...setup hypercall page..etc */
         ret = hv_init();
@@ -558,13 +558,16 @@ static int vmbus_bus_init(int irq)
          */
         irq_set_handler(irq, vmbus_flow_handler);
 
-        vector = IRQ0_VECTOR + irq;
+        /*
+         * Register our interrupt handler.
+         */
+        hv_register_vmbus_handler(irq, vmbus_isr);
 
         /*
-         * Notify the hypervisor of our irq and
+         * Initialize the per-cpu interrupt state and
          * connect to the host.
          */
-        on_each_cpu(hv_synic_init, (void *)&vector, 1);
+        on_each_cpu(hv_synic_init, NULL, 1);
         ret = vmbus_connect();
         if (ret)
                 goto err_irq;