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Date:   Thu, 6 Jun 2019 16:33:06 +0200
From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     Alan Stern <stern@rowland.harvard.edu>
Cc:     David Howells <dhowells@redhat.com>, viro@zeniv.linux.org.uk,
        linux-usb@vger.kernel.org, raven@themaw.net,
        linux-fsdevel@vger.kernel.org, linux-api@vger.kernel.org,
        linux-block@vger.kernel.org, keyrings@vger.kernel.org,
        linux-security-module@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 09/10] usb: Add USB subsystem notifications [ver #3]
Message-ID: <20190606143306.GA11294@kroah.com>
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 <Pine.LNX.4.44L0.1906061020000.1641-100000@iolanthe.rowland.org>
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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.

thanks,

greg k-h