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path: root/drivers/hv/vmbus_drv.c
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Diffstat (limited to 'drivers/hv/vmbus_drv.c')
-rw-r--r--drivers/hv/vmbus_drv.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index 6e4f85720f26..e066d418be97 100644
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -33,6 +33,7 @@
#include <acpi/acpi_bus.h>
#include <linux/completion.h>
#include <linux/hyperv.h>
+#include <linux/kernel_stat.h>
#include <asm/hyperv.h>
#include <asm/hypervisor.h>
#include "hyperv_vmbus.h"
@@ -501,6 +502,19 @@ static irqreturn_t vmbus_isr(int irq, void *dev_id)
}
/*
+ * vmbus interrupt flow handler:
+ * vmbus interrupts can concurrently occur on multiple CPUs and
+ * can be handled concurrently.
+ */
+
+void vmbus_flow_handler(unsigned int irq, struct irq_desc *desc)
+{
+ kstat_incr_irqs_this_cpu(irq, desc);
+
+ desc->action->handler(irq, desc->action->dev_id);
+}
+
+/*
* vmbus_bus_init -Main vmbus driver initialization routine.
*
* Here, we
@@ -535,6 +549,13 @@ static int vmbus_bus_init(int irq)
goto err_unregister;
}
+ /*
+ * Vmbus interrupts can be handled concurrently on
+ * different CPUs. Establish an appropriate interrupt flow
+ * handler that can support this model.
+ */
+ irq_set_handler(irq, vmbus_flow_handler);
+
vector = IRQ0_VECTOR + irq;
/*

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