RE: [PATCH v2 2/3] vdpa: Add a device object for vdpa management device

Mon, 16 May 2022 13:06:37 -0700 


> From: Xie Yongji <[email protected]>
> Sent: Monday, May 16, 2022 2:04 AM
> 
> Introduce a device object for vdpa management device to control its
> lifecycle. 
Why is this needed?
What is the limitation of current approach that requires new device for mgmtdev?
The primary motivation is missing in the commit log here.

> And the device name will be used to match
> VDPA_ATTR_MGMTDEV_DEV_NAME field of netlink message rather than
> using parent device name.
> 
> With this patch applied, drivers should use vdpa_mgmtdev_alloc() or
> _vdpa_mgmtdev_alloc() to allocate a vDPA management device before
> calling vdpa_mgmtdev_register(). And some buggy empty release function
> can also be removed from the driver codes.
What is the bug, can you please explain?
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