RE: [PATCH] Fix null pointer error after vmbus loading

[Haiyang Zhang]

> -----Original Message-----
> From: Greg KH [mailto:gregkh@xxxxxxx]
> But this is not how you check to see if your device is registered at
> all, you can not rely on the driver core to have the name set or not to
> reflect the status of the device.  Devices have many stages in their
> lifecycle, and the name reliably shows none of them.
> 
> Actually, why do you need to know this?  Shouldn't you always know the
> state of your device, how can you get passed an unregistered device?

I have traced down the callers to the function, vmbus_child_device_register(),
and verified that the struct device was kzalloc-ed by the current thread,
and not visible to other threads before we register the device. So the 
dev name is always NULL here, we can skip the NULL & strlen checking. I 
will send you the new patch soon.

Thanks,

- Haiyang

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