linux-kernel - Re: [PATCH] Input: psmouse - add small delay for IBM trackpoint pass-through mode

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:	Wed, 26 Aug 2015 13:13:20 -0700
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	Stefan Assmann <sassmann@...nic.de>
Cc:	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Input: psmouse - add small delay for IBM trackpoint
 pass-through mode

On Sat, Aug 15, 2015 at 04:40:18PM +0200, Stefan Assmann wrote:
> There are trackpoint devices that fail to respond to the PS2 command
> PSMOUSE_CMD_GETID if immediately queried after the parent device is
> deactivated. Add a small delay for the hardware to get in a sane state
> before sending any PS2 commands.
> 
> One example of such a system is:
> Lenovo ThinkPad X120e, model 30515QG
> synaptics: Touchpad model: 1, fw: 8.0, id: 0x1e2b1, caps: 0xd001a3/0x940300/0x121c00, board id: 1811, fw id: 797391
> 
> Signed-off-by: Stefan Assmann <sassmann@...nic.de>

Applied, thank you.

> ---
>  drivers/input/mouse/psmouse-base.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/input/mouse/psmouse-base.c b/drivers/input/mouse/psmouse-base.c
> index ec347703..ad18dab 100644
> --- a/drivers/input/mouse/psmouse-base.c
> +++ b/drivers/input/mouse/psmouse-base.c
> @@ -1540,6 +1540,10 @@ static int psmouse_connect(struct serio *serio, struct serio_driver *drv)
>  	if (error)
>  		goto err_clear_drvdata;
>  
> +	/* give PT device some time to settle down before probing */
> +	if (serio->id.type == SERIO_PS_PSTHRU)
> +		usleep_range(10000, 15000);
> +
>  	if (psmouse_probe(psmouse) < 0) {
>  		error = -ENODEV;
>  		goto err_close_serio;
> -- 
> 2.4.3
> 

-- 
Dmitry
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/