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

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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: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
K. Y. Srinivasan 2011-08-25 09:48:39 -07:00 committed by Greg Kroah-Hartman
parent 0ddda6603a
commit 5841a82959
1 changed files with 15 additions and 5 deletions
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20
drivers/staging/hv/vmbus_drv.c
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@ -255,21 +255,31 @@ static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env)
return ret; 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 * vmbus_match - Attempt to match the specified device to the specified driver
*/ */
static int vmbus_match(struct device *device, struct device_driver *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_driver *drv = drv_to_hv_drv(driver);
struct hv_device *hv_dev = device_to_hv_device(device); 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 ? */ for (; !is_null_guid(id_array->guid); id_array++)
if (!uuid_le_cmp(hv_dev->dev_type, drv->dev_type)) if (!memcmp(&id_array->guid, &hv_dev->dev_type.b,
match = 1; sizeof(struct hv_vmbus_device_id)))
return 1;
return match; return 0;
} }
/* /*