[PATCH v2 3/3] drivers:hv Remove old MMIO management code

[Jake Oshins <jakeo@microsoft.com>]

This patch removes the now-redundant code which examined the ACPI namespace
directly for memory-mapped I/O regions for its children.

Signed-off-by: Jake Oshins <jakeo@microsoft.com>
---
 drivers/hv/vmbus_drv.c | 28 ++--------------------------
 include/linux/hyperv.h |  2 --
 2 files changed, 2 insertions(+), 28 deletions(-)

diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index 7783f4c..193a362 100644
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -44,12 +44,6 @@ static struct tasklet_struct msg_dpc;
 static struct completion probe_event;
 static int irq;
 
-struct resource hyperv_mmio = {
-	.name  = "hyperv mmio",
-	.flags = IORESOURCE_MEM,
-};
-EXPORT_SYMBOL_GPL(hyperv_mmio);
-
 static int vmbus_exists(void)
 {
 	if (hv_acpi_dev == NULL)
@@ -899,11 +893,6 @@ static acpi_status vmbus_walk_resources(struct acpi_resource *res, void *ctx)
 	case ACPI_RESOURCE_TYPE_IRQ:
 		irq = res->data.irq.interrupts[0];
 		break;
-
-	case ACPI_RESOURCE_TYPE_ADDRESS64:
-		hyperv_mmio.start = res->data.address64.address.minimum;
-		hyperv_mmio.end = res->data.address64.address.maximum;
-		break;
 	}
 
 	return AE_OK;
@@ -917,24 +906,11 @@ static int vmbus_acpi_add(struct acpi_device *device)
 	hv_acpi_dev = device;
 
 	result = acpi_walk_resources(device->handle, METHOD_NAME__CRS,
-					vmbus_walk_resources, NULL);
+				     vmbus_walk_resources, NULL);
 
 	if (ACPI_FAILURE(result))
 		goto acpi_walk_err;
-	/*
-	 * The parent of the vmbus acpi device (Gen2 firmware) is the VMOD that
-	 * has the mmio ranges. Get that.
-	 */
-	if (device->parent) {
-		result = acpi_walk_resources(device->parent->handle,
-					METHOD_NAME__CRS,
-					vmbus_walk_resources, NULL);
-
-		if (ACPI_FAILURE(result))
-			goto acpi_walk_err;
-		if (hyperv_mmio.start && hyperv_mmio.end)
-			request_resource(&iomem_resource, &hyperv_mmio);
-	}
+
 	ret_val = 0;
 
 acpi_walk_err:
diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h
index 796cc32..993ea5f 100644
--- a/include/linux/hyperv.h
+++ b/include/linux/hyperv.h
@@ -1221,8 +1221,6 @@ int hv_vss_init(struct hv_util_service *);
 void hv_vss_deinit(void);
 void hv_vss_onchannelcallback(void *);
 
-extern struct resource hyperv_mmio;
-
 /*
  * Negotiated version with the Host.
  */
-- 
1.9.1