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

From: Greg Kroah-Hartman
Date: Thu Jun 06 2019 - 10:37:16 EST

On Thu, Jun 06, 2019 at 10:24:18AM -0400, Alan Stern wrote:
> 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.

See the other patch on the linux-usb list that wanted to start adding
KOBJ_CHANGE notifications about USB "i/o errors".

So for "severe" issues, yes, we should do this, but perhaps not for all
of the "normal" things we see when a device is yanked out of the system
and the like.


greg k-h