Re: [PATCH 12/59] Staging: hv: vmbus: Cleanup vmbus_uevent() code

Greg KH
2011-08-25T22:30:31Z

On Thu, Aug 25, 2011 at 10:20:32PM +0000, KY Srinivasan wrote:
> > > I have to edit this to get it to work properly with the fact that I
> > > added the driver_data field to hv_vmbus_device_id.
> >
> > You should have a copy of the patch I applied in your inbox now, can you
> > verify I didn't mess it up?
>
> Greg,
>
> I don't think I got this mail. Could you resend the mail.

Sure, here it is:

From: "K. Y. Srinivasan" <kys@microsoft.com>
Date: Thu, 25 Aug 2011 09:48:38 -0700
Subject: [PATCH] Staging: hv: vmbus: Cleanup vmbus_uevent() code
Status: RO
Content-Length: 2871
Lines: 82

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

[gregkh - fixed code to handle driver_data portion of struct
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>

diff --git a/drivers/staging/hv/vmbus_drv.c b/drivers/staging/hv/vmbus_drv.c
index b651968..afb16704 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 *)0)->guid) + 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 *)0)->guid) * 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;
}