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Date:   Fri, 13 Nov 2020 07:56:31 +0000
From:   Lee Jones <lee.jones@linaro.org>
To:     Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc:     linux-kernel@vger.kernel.org, Henrik Rydberg <rydberg@bitmath.org>,
        James Hilliard <james.hilliard1@gmail.com>,
        Daniel Ritz <daniel.ritz@gmx.ch>, linux-input@vger.kernel.org
Subject: Re: [PATCH 07/15] input: touchscreen: usbtouchscreen: Remove unused
 variable 'ret'
Message-ID: <20201113075631.GI2787115@dell>
References: <20201112110204.2083435-1-lee.jones@linaro.org>
 <20201112110204.2083435-8-lee.jones@linaro.org>
 <20201113073655.GF356503@dtor-ws>
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On Thu, 12 Nov 2020, Dmitry Torokhov wrote:

> On Thu, Nov 12, 2020 at 11:01:56AM +0000, Lee Jones wrote:
> > Fixes the following W=1 kernel build warning(s):
> > 
> >  drivers/input/touchscreen/usbtouchscreen.c: In function ‘nexio_read_data’:
> >  drivers/input/touchscreen/usbtouchscreen.c:1052:50: warning: variable ‘ret’ set but not used [-Wunused-but-set-variable]
> > 
> > Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
> > Cc: Henrik Rydberg <rydberg@bitmath.org>
> > Cc: James Hilliard <james.hilliard1@gmail.com>
> > Cc: Daniel Ritz <daniel.ritz@gmx.ch>
> > Cc: linux-input@vger.kernel.org
> > Signed-off-by: Lee Jones <lee.jones@linaro.org>
> > ---
> >  drivers/input/touchscreen/usbtouchscreen.c | 4 ++--
> >  1 file changed, 2 insertions(+), 2 deletions(-)
> > 
> > diff --git a/drivers/input/touchscreen/usbtouchscreen.c b/drivers/input/touchscreen/usbtouchscreen.c
> > index 397cb1d3f481b..c3b7130cd9033 100644
> > --- a/drivers/input/touchscreen/usbtouchscreen.c
> > +++ b/drivers/input/touchscreen/usbtouchscreen.c
> > @@ -1049,7 +1049,7 @@ static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt)
> >  	unsigned int data_len = be16_to_cpu(packet->data_len);
> >  	unsigned int x_len = be16_to_cpu(packet->x_len);
> >  	unsigned int y_len = be16_to_cpu(packet->y_len);
> > -	int x, y, begin_x, begin_y, end_x, end_y, w, h, ret;
> > +	int x, y, begin_x, begin_y, end_x, end_y, w, h;
> >  
> >  	/* got touch data? */
> >  	if ((pkt[0] & 0xe0) != 0xe0)
> > @@ -1061,7 +1061,7 @@ static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt)
> >  		x_len -= 0x80;
> >  
> >  	/* send ACK */
> > -	ret = usb_submit_urb(priv->ack, GFP_ATOMIC);
> > +	usb_submit_urb(priv->ack, GFP_ATOMIC);
> 
> I wonder if we should handle potential errors instead.

Your call.  I'll do whatever you decide.

-- 
Lee Jones [李琼斯]
Senior Technical Lead - Developer Services
Linaro.org │ Open source software for Arm SoCs
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