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Staging: hv: vmbus: Introduce a utility function to match hv_vmbus_device_id 

Introduce a utility function to match hv_vmbus_device_id.

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 2011-09-13 10:59:37 -07:00 committed by Greg Kroah-Hartman
parent 25bb6c0a94
commit 3037a7b61f
1 changed files with 18 additions and 5 deletions
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23
drivers/staging/hv/vmbus_drv.c
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@ -272,6 +272,22 @@ static inline bool is_null_guid(const __u8 *guid)
return true;
}
/*
* Return a matching hv_vmbus_device_id pointer.
* If there is no match, return NULL.
*/
static const struct hv_vmbus_device_id *hv_vmbus_get_id(
const struct hv_vmbus_device_id *id,
__u8 *guid)
{
for (; !is_null_guid(id->guid); id++)
if (!memcmp(&id->guid, guid, sizeof(uuid_le)))
return id;
return NULL;
}
/*
* vmbus_match - Attempt to match the specified device to the specified driver
@ -280,12 +296,9 @@ static int vmbus_match(struct device *device, struct device_driver *driver)
{
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;
for (; !is_null_guid(id_array->guid); id_array++)
if (!memcmp(&id_array->guid, &hv_dev->dev_type.b,
sizeof(uuid_le)))
return 1;
if (hv_vmbus_get_id(drv->id_table, hv_dev->dev_type.b))
return 1;
return 0;
}