[PATCH 09/10] usb: Add USB subsystem notifications [ver #3]

[Alan Stern]

On Thu, 6 Jun 2019, David Howells wrote:

> Add a USB subsystem notification mechanism whereby notifications about
> hardware events such as device connection, disconnection, reset and I/O
> errors, can be reported to a monitoring process asynchronously.

USB I/O errors covers an awfully large and vague field.  Do we really
want to include them?  I'm doubtful.

Alan Stern