Commit 5841a829 authored by K. Y. Srinivasan's avatar K. Y. Srinivasan Committed by Greg Kroah-Hartman
Browse files

Staging: hv: vmbus: Support the notion of id tables in vmbus_match() 



Introduce code to handle driver specific id tables to the vmbus core
(vmbus_match). This would allow us to handle more than one device type
with a given driver.

Signed-off-by: default avatarK. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: default avatarHaiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 0ddda660

drivers/staging/hv/vmbus_drv.c

+15 −5
Original line number Diff line number Diff line
@@ -255,21 +255,31 @@ static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env) 
	return ret;

}



static uuid_le null_guid;



static inline bool is_null_guid(const __u8 *guid)

{

	if (memcmp(guid, &null_guid, sizeof(uuid_le)))

		return false;

	return true;

}





/*

 * vmbus_match - Attempt to match the specified device to the specified driver

 */

static int vmbus_match(struct device *device, struct device_driver *driver)

{

	int match = 0;

	struct hv_driver *drv = drv_to_hv_drv(driver);

	struct hv_device *hv_dev = device_to_hv_device(device);

	const struct hv_vmbus_device_id *id_array = drv->id_table;



	/* We found our driver ? */

	if (!uuid_le_cmp(hv_dev->dev_type, drv->dev_type))

		match = 1;

	for (; !is_null_guid(id_array->guid); id_array++)

		if (!memcmp(&id_array->guid, &hv_dev->dev_type.b,

				sizeof(struct hv_vmbus_device_id)))

			return 1;



	return match;

	return 0;

}



/*