linux-kernel - Re: [PATCH] Input: psmouse

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Date:	Fri, 4 Dec 2015 08:16:34 +0100
From:	Hans de Goede <hdegoede@...hat.com>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	linux-input@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Input: psmouse - clean up Cypress probe

Hi,

On 04-12-15 00:56, Dmitry Torokhov wrote:
> When Cypress protocol support is disabled cypress_init() is a stub that
> always returns -ENOSYS, so there is not point in testing for
> CONFIG_MOUSE_PS2_CYPRESS after we decided that we are dealing with a
> Cypress device. Also, we should only be calling cypress_detect() when
> set_properties argument is "true", like with other protocols.
>
> There is a slight change in behavior to make follow-up patches more
> uniform: when we detect Cypress but its initialization fails, instead of
> immediately returning PSMOUSE_PS2 protocol we now continue trying
> IntelliMouse [Explorer]. Given that Cypress devices only have issue with
> Sentelic probes probing Imtellimouse should be safe.
>
> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>

Thanks, looks good to me:

Reviewed-by: Hans de Goede <hdegoede@...hat.com>

Regards,

Hans


> ---
>   drivers/input/mouse/psmouse-base.c | 20 ++++++++------------
>   1 file changed, 8 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/input/mouse/psmouse-base.c b/drivers/input/mouse/psmouse-base.c
> index c2bd866..978ba0b 100644
> --- a/drivers/input/mouse/psmouse-base.c
> +++ b/drivers/input/mouse/psmouse-base.c
> @@ -836,19 +836,15 @@ static int psmouse_extensions(struct psmouse *psmouse,
>   	 * Trackpads.
>   	 */
>   	if (max_proto > PSMOUSE_IMEX &&
> -			cypress_detect(psmouse, set_properties) == 0) {
> -		if (IS_ENABLED(CONFIG_MOUSE_PS2_CYPRESS)) {
> -			if (cypress_init(psmouse) == 0)
> -				return PSMOUSE_CYPRESS;
> -
> -			/*
> -			 * Finger Sensing Pad probe upsets some modules of
> -			 * Cypress Trackpad, must avoid Finger Sensing Pad
> -			 * probe if Cypress Trackpad device detected.
> -			 */
> -			return PSMOUSE_PS2;
> -		}
> +	    psmouse_do_detect(cypress_detect, psmouse, set_properties) == 0) {
> +		if (!set_properties || cypress_init(psmouse) == 0)
> +			return PSMOUSE_CYPRESS;
>
> +		/*
> +		 * Finger Sensing Pad probe upsets some modules of
> +		 * Cypress Trackpad, must avoid Finger Sensing Pad
> +		 * probe if Cypress Trackpad device detected.
> +		 */
>   		max_proto = PSMOUSE_IMEX;
>   	}
>
>
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