linux-kernel - Re: 3.5-rcX: USB support without udev?

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Message-ID: <20120702055231.GA3603@polaris.bitmath.org>
Date:	Mon, 2 Jul 2012 07:52:31 +0200
From:	"Henrik Rydberg" <rydberg@...omail.se>
To:	Bob Tracy <rct@...rkin.frus.com>
Cc:	Greg KH <gregkh@...uxfoundation.org>,
	Ming Lei <tom.leiming@...il.com>, linux-kernel@...r.kernel.org
Subject: Re: 3.5-rcX: USB support without udev?

On Sun, Jul 01, 2012 at 07:29:51PM -0500, Bob Tracy wrote:
> On Sun, Jul 01, 2012 at 06:25:42PM -0500, Bob Tracy wrote:
> > On Sun, Jul 01, 2012 at 10:41:18PM +0200, Henrik Rydberg wrote:
> > > If you did a 'make oldconfig' on anything prior to -rc5, chances are
> > > you do not have CONFIG_HID_GENERIC=y in your .config.
> > 
> > That might well be the missing "glue."  I'm building -rc5 as I type
> > this.  Should have an answer in a few hours.  Thanks for the clue!
> 
> That was it!  Thank you!  Keyboard and mouse now working fine.
> 
> Unless there was a way to get the CONFIG_HID_GENERIC functionality
> via some other mechanism prior to -rc5, I'd classify this as a
> regression introduced in 3.5-rc1 that was fixed in -rc5.

The option has been there since 3.5-rc1, but it was buried in the
special drivers section, with a help text saying nothing about its
significance. The Hitchhiker's Guide says it quite well, I think:

  "You hadn't exactly gone out of your way to call attention to them
  had you? I mean like actually telling anyone or anything."

  "But the plans were on display..."

  "On display? I eventually had to go down to the cellar to find
  them."

  "That's the display department."

  "With a torch."

  "Ah, well the lights had probably gone."

  "So had the stairs."

  "But look you found the notice didn't you?"

  "Yes", said Arthur, "yes I did. It was on display in the bottom of a
  locked filing cabinet stuck in a disused lavatory with a sign on the
  door saying Beware of The Leopard".

Henrik
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