[PATCH 019/117] Staging: hv: vmbus: Cleanup vmbus_uevent() code

K. Y. Srinivasan
2011-07-15T18:05:49Z

Now generate appropriate uevent based on the modalias string. As part of this,
cleanup the existing uevent code.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
---
drivers/staging/hv/vmbus_drv.c | 60 ++++++++--------------------------------
1 files changed, 12 insertions(+), 48 deletions(-)

diff --git a/drivers/staging/hv/vmbus_drv.c b/drivers/staging/hv/vmbus_drv.c
index 330cc43..7baba62 100644
--- a/drivers/staging/hv/vmbus_drv.c
+++ b/drivers/staging/hv/vmbus_drv.c
@@ -237,58 +237,22 @@ static struct device_attribute vmbus_device_attrs[] = {
* This routine is invoked when a device is added or removed on the vmbus to
* generate a uevent to udev in the userspace. The udev will then look at its
* rule and the uevent generated here to load the appropriate driver
+ *
+ * The alias string will be of the form vmbus:guid where guid is the string
+ * representation of the device guid (each byte of the guid will be
+ * represented with two hex characters.
*/
static int vmbus_uevent(struct device *device, struct kobj_uevent_env *env)
{
struct hv_device *dev = device_to_hv_device(device);
- int ret;
-
- ret = add_uevent_var(env, "VMBUS_DEVICE_CLASS_GUID={"
- "%02x%02x%02x%02x-%02x%02x-%02x%02x-"
- "%02x%02x%02x%02x%02x%02x%02x%02x}",
- dev->dev_type.b[3],
- dev->dev_type.b[2],
- dev->dev_type.b[1],
- dev->dev_type.b[0],
- dev->dev_type.b[5],
- dev->dev_type.b[4],
- dev->dev_type.b[7],
- dev->dev_type.b[6],
- dev->dev_type.b[8],
- dev->dev_type.b[9],
- dev->dev_type.b[10],
- dev->dev_type.b[11],
- dev->dev_type.b[12],
- dev->dev_type.b[13],
- dev->dev_type.b[14],
- dev->dev_type.b[15]);
-
- if (ret)
- return ret;
+ int i, ret;
+ char alias_name[((sizeof(struct hv_vmbus_device_id) + 1)) * 2];

- ret = add_uevent_var(env, "VMBUS_DEVICE_DEVICE_GUID={"
- "%02x%02x%02x%02x-%02x%02x-%02x%02x-"
- "%02x%02x%02x%02x%02x%02x%02x%02x}",
- dev->dev_instance.b[3],
- dev->dev_instance.b[2],
- dev->dev_instance.b[1],
- dev->dev_instance.b[0],
- dev->dev_instance.b[5],
- dev->dev_instance.b[4],
- dev->dev_instance.b[7],
- dev->dev_instance.b[6],
- dev->dev_instance.b[8],
- dev->dev_instance.b[9],
- dev->dev_instance.b[10],
- dev->dev_instance.b[11],
- dev->dev_instance.b[12],
- dev->dev_instance.b[13],
- dev->dev_instance.b[14],
- dev->dev_instance.b[15]);
- if (ret)
- return ret;
+ for (i = 0; i < (sizeof(struct hv_vmbus_device_id) * 2); i += 2)
+ sprintf(&alias_name[i], "%02x", dev->dev_type.b[i/2]);

- return 0;
+ ret = add_uevent_var(env, "MODALIAS=vmbus:%s", alias_name);
+ return ret;
}

--
1.7.4.1