Linux Virtualization - May 2010 - Staging: hv: fix hv_utils module to properly autoload

From: Haiyang Zhang <haiyangz at microsoft.com>

Added autoloading based on pci id and dmi strings.

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

---
 drivers/staging/hv/hv_utils.c |   28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

--- 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(
 	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;

This is a note to let you know that I've just added the patch titled

    Subject: Staging: hv: fix hv_utils module to properly autoload

to my gregkh-2.6 tree.  Its filename is

    staging-hv-fix-hv_utils-module-to-properly-autoload.patch

This tree can be found at 
    http://www.kernel.org/pub/linux/kernel/people/gregkh/gregkh-2.6/patches/