linux-kernel - Re: [PATCH] INPUT: fix hidinput_connect ignoring retval from input_register

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Message-ID: <d120d5000710290554x618eca05tbf864a0f7f9b77a5@mail.gmail.com>
Date:	Mon, 29 Oct 2007 08:54:59 -0400
From:	"Dmitry Torokhov" <dmitry.torokhov@...il.com>
To:	"Jiri Kosina" <jikos@...os.cz>
Cc:	"Dirk Hohndel" <hohndel@...ux.intel.com>,
	"Jeff Garzik" <jeff@...zik.org>,
	linux-input@...ey.karlin.mff.cuni.cz, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] INPUT: fix hidinput_connect ignoring retval from input_register_device

On 10/29/07, Jiri Kosina <jikos@...os.cz> wrote:
> On Mon, 29 Oct 2007, Dirk Hohndel wrote:
>
> > [INPUT] hidinput_connect incorrectly ignored return value from
> > input_register_device
> > Signed-off-by: Dirk Hohndel <hohndel@...ux.intel.com>
>
> Will apply

Please don't - the fix is completely broken for multi-input devices -
if 2nd device fails to register we bail out of hidinput_connect and
thus never set HID_CLAIMED_INPUT bit. So when we disconnect device we
never call hidinput_disconnect and who knows what will happen after
that.

hidinput_connect() should properly unwind already registered devices
after failure.

-- 
Dmitry
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