From: Haiyang Zhang <[email-masked]>

Subject: [PATCH 2/2] staging: hv: Add autoloading to hv_utils module
Added autoloading based on pci id and dmi strings.

Signed-off-by: Haiyang Zhang <[email-masked]>
Signed-off-by: Hank Janssen <[email-masked]>

---
 drivers/staging/hv/hv_utils.c |   29 +++++++++++++++++++++++++++++
 1 files changed, 29 insertions(+), 0 deletions(-)

diff --git a/drivers/staging/hv/hv_utils.c b/drivers/staging/hv/hv_utils.c
index f9826c7..b831a65 100644
--- a/drivers/staging/hv/hv_utils.c
+++ b/drivers/staging/hv/hv_utils.c
@@ -24,6 +24,8 @@
 #include <linux/slab.h>
 #include <linux/sysctl.h>
 #include <linux/reboot.h>
+#include <linux/dmi.h>
+#include <linux/pci.h>
 
 #include "logging.h"
 #include "osd.h"
@@ -251,10 +253,37 @@ static void heartbeat_onchannelcallback(void *context)
 	DPRINT_EXIT(VMBUS);
 }
 
+
+static const struct pci_device_id __initconst
+hv_utils_pci_table[] __maybe_unused = {
+	{ PCI_DEVICE(0x1414, 0x5353) }, /* Hyper-V emulated VGA controller */
+	{ 0 }
+};
+MODULE_DEVICE_TABLE(pci, hv_utils_pci_table);
+
+
+static const struct dmi_system_id __initconst
+hv_utils_dmi_table[] __maybe_unused  = {
+	{
+		.ident = "Hyper-V",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Virtual Machine"),
+			DMI_MATCH(DMI_BOARD_NAME, "Virtual Machine"),
+		},
+	},
+	{ },
+};
+MODULE_DEVICE_TABLE(dmi, hv_utils_dmi_table);
+
+
 static int __init init_hyperv_utils(void)
 {
 	printk(KERN_INFO "Registering HyperV Utility Driver...\n");
 
+	if (!dmi_check_system(hv_utils_dmi_table))
+		return -ENODEV;
+
 	/* Wait until all IC channels are initialized */
 	while (atomic_read(&hv_utils_initcnt) < MAX_MSG_TYPES)
 		msleep(100);
-- 
1.6.3.2