Staging: hv: fix hv_utils module to properly autoload

Added autoloading based on pci id and dmi strings.

Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Hank Janssen <hjanssen@microsoft.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 28 insertions, 0 deletions

diff --git a/drivers/staging/hv/hv_utils.c b/drivers/staging/hv/hv_utils.c
index 8a49aafea37..2adc9b48ca9 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 +253,36 @@ 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;
+
         hv_cb_utils[HV_SHUTDOWN_MSG].channel->OnChannelCallback =
                 &shutdown_onchannelcallback;
         hv_cb_utils[HV_SHUTDOWN_MSG].callback = &shutdown_onchannelcallback;