linux-kernel - Re: Regression 2.6.31: ioctl(EVIOCGNAME) no longer returns device name

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Message-ID: <20090719214030.345a9944@hyperion.delvare>
Date:	Sun, 19 Jul 2009 21:40:30 +0200
From:	Jean Delvare <khali@...ux-fr.org>
To:	Mark Lord <lkml@....ca>
Cc:	Andy Walls <awalls@...ix.net>, linux-media@...r.kernel.org,
	Jarod Wilson <jarod@...hat.com>, Mike Isely <isely@...ox.com>,
	Hans Verkuil <hverkuil@...all.nl>,
	Mauro Carvalho Chehab <mchehab@...radead.org>,
	Janne Grunau <j@...nau.net>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-input@...r.kernel.org
Subject: Re: Regression 2.6.31:  ioctl(EVIOCGNAME) no longer returns device
 name

On Sun, 19 Jul 2009 15:20:50 -0400, Mark Lord wrote:
> Mark Lord wrote:
> > (resending.. somebody trimmed linux-kernel from the CC: earlier)

FWIW I don't think it was there in the first place.

> > Jean Delvare wrote:
> >> On Sun, 19 Jul 2009 10:38:37 -0400, Mark Lord wrote:
> >>> I'm debugging various other b0rked things in 2.6.31 here right now,
> >>> so I had a closer look at the Hauppauge I/R remote issue.
> >>>
> >>> The ir_kbd_i2c driver *does* still find it after all.
> >>> But the difference is that the output from 'lsinput' has changed
> >>> and no longer says "Hauppauge".  Which prevents the application from
> >>> finding the remote control in the same way as before.
> >>
> >> OK, thanks for the investigation.
> >>
> >>> I'll hack the application code here now to use the new output,
> >>> but I wonder what the the thousands of other users will do when
> >>> they first try 2.6.31 after release ?
> ..
> 
> Mmm.. appears to be a systemwide thing, not just for the i2c stuff.
> *All* of the input devices now no longer show their real names
> when queried with ioctl(EVIOCGNAME).  This is a regression from 2.6.30.
> Note that the real names *are* still stored somewhere, because they
> do still show up correctly under /sys/

I was just coming to the same conclusion. So this doesn't have anything
to do with the ir-kbd-i2c conversion after all... This is something for
the input subsystem maintainers.

I suspect this commit is related to the regression:

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=3d5cb60ef3042ac479dab82e5a945966a0d54d53

-- 
Jean Delvare
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