[PATCH v2 0/4] [Set 2/2] Rid W=1 issues from Input

[PATCH v2 0/4] [Set 2/2] Rid W=1 issues from Input

[Lee Jones]

This set is part of a larger effort attempting to clean-up W=1
kernel builds, which are currently overwhelmingly riddled with
niggly little warnings.

This is the second (and last) of 2 sets.

v2:
 - Replace empty if() with commentary
   - Suggested-by: Joe Perches

Lee Jones (4):
  input: mouse: synaptics: Replace NOOP with suitable commentary
  input: touchscreen: melfas_mip4: Remove a bunch of unused variables
  input: touchscreen: usbtouchscreen: Remove unused variable 'ret'
  input: touchscreen: surface3_spi: Remove set but unused variable
    'timestamp'

 drivers/input/mouse/synaptics.c            |  7 +++++--
 drivers/input/touchscreen/melfas_mip4.c    | 11 -----------
 drivers/input/touchscreen/surface3_spi.c   |  2 --
 drivers/input/touchscreen/usbtouchscreen.c |  4 ++--
 4 files changed, 7 insertions(+), 17 deletions(-)

Cc: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Cc: Bruce Kalk <kall@compass.com>
Cc: "C. Scott Ananian" <cananian@alumni.priceton.edu>
Cc: Daniel Ritz <daniel.ritz@gmx.ch>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Henrik Rydberg <rydberg@bitmath.org>
Cc: James Hilliard <james.hilliard1@gmail.com>
Cc: linux-input@vger.kernel.org
Cc: Peter Osterlund <petero2@telia.com>
Cc: Sangwon Jee <jeesw@melfas.com>
Cc: Stefan Gmeiner <riddlebox@freesurf.ch>
Cc: this to <linux-input@vger.kernel.org>
-- 
2.25.1

[PATCH v2 1/4] input: mouse: synaptics: Replace NOOP with suitable commentary

[Lee Jones]

Fixes the following W=1 kernel build warning(s):

 drivers/input/mouse/synaptics.c: In function ‘synaptics_process_packet’:
 drivers/input/mouse/synaptics.c:1110:6: warning: suggest braces around empty body in an ‘if’ statement [-Wempty-body]

Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Henrik Rydberg <rydberg@bitmath.org>
Cc: Peter Osterlund <petero2@telia.com>
Cc: Stefan Gmeiner <riddlebox@freesurf.ch>
Cc: "C. Scott Ananian" <cananian@alumni.priceton.edu>
Cc: Bruce Kalk <kall@compass.com>
Cc: this to <linux-input@vger.kernel.org>
Cc: linux-input@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 drivers/input/mouse/synaptics.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c
index 8fb7b4385ded9..3cc8b76629fa2 100644
--- a/drivers/input/mouse/synaptics.c
+++ b/drivers/input/mouse/synaptics.c
@@ -1106,8 +1106,11 @@ static void synaptics_process_packet(struct psmouse *psmouse)
 					num_fingers = hw.w + 2;
 				break;
 			case 2:
-				if (SYN_MODEL_PEN(info->model_id))
-					;   /* Nothing, treat a pen as a single finger */
+				/*
+				 * Keep defaults
+				 *
+				 * SYN_MODEL_PEN: Treat pens as a single finger
+				 */
 				break;
 			case 4 ... 15:
 				if (SYN_CAP_PALMDETECT(info->capabilities))
-- 
2.25.1

[PATCH v2 2/4] input: touchscreen: melfas_mip4: Remove a bunch of unused variables

[Lee Jones]

Fixes the following W=1 kernel build warning(s):

 drivers/input/touchscreen/melfas_mip4.c: In function ‘mip4_report_touch’:
 drivers/input/touchscreen/melfas_mip4.c:474:5: warning: variable ‘size’ set but not used [-Wunused-but-set-variable]
 drivers/input/touchscreen/melfas_mip4.c:472:5: warning: variable ‘pressure_stage’ set but not used [-Wunused-but-set-variable]
 drivers/input/touchscreen/melfas_mip4.c:469:7: warning: variable ‘palm’ set but not used [-Wunused-but-set-variable]
 drivers/input/touchscreen/melfas_mip4.c:468:7: warning: variable ‘hover’ set but not used [-Wunused-but-set-variable]

Cc: Sangwon Jee <jeesw@melfas.com>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Henrik Rydberg <rydberg@bitmath.org>
Cc: linux-input@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 drivers/input/touchscreen/melfas_mip4.c | 11 -----------
 1 file changed, 11 deletions(-)

diff --git a/drivers/input/touchscreen/melfas_mip4.c b/drivers/input/touchscreen/melfas_mip4.c
index f67efdd040b24..9c98759098c7a 100644
--- a/drivers/input/touchscreen/melfas_mip4.c
+++ b/drivers/input/touchscreen/melfas_mip4.c
@@ -465,13 +465,9 @@ static void mip4_report_keys(struct mip4_ts *ts, u8 *packet)
 static void mip4_report_touch(struct mip4_ts *ts, u8 *packet)
 {
 	int id;
-	bool hover;
-	bool palm;
 	bool state;
 	u16 x, y;
-	u8 pressure_stage = 0;
 	u8 pressure;
-	u8 size;
 	u8 touch_major;
 	u8 touch_minor;
 
@@ -480,14 +476,11 @@ static void mip4_report_touch(struct mip4_ts *ts, u8 *packet)
 	case 1:
 		/* Touch only */
 		state = packet[0] & BIT(7);
-		hover = packet[0] & BIT(5);
-		palm = packet[0] & BIT(4);
 		id = (packet[0] & 0x0F) - 1;
 		x = ((packet[1] & 0x0F) << 8) | packet[2];
 		y = (((packet[1] >> 4) & 0x0F) << 8) |
 			packet[3];
 		pressure = packet[4];
-		size = packet[5];
 		if (ts->event_format == 0) {
 			touch_major = packet[5];
 			touch_minor = packet[5];
@@ -501,14 +494,10 @@ static void mip4_report_touch(struct mip4_ts *ts, u8 *packet)
 	default:
 		/* Touch + Force(Pressure) */
 		id = (packet[0] & 0x0F) - 1;
-		hover = packet[1] & BIT(2);
-		palm = packet[1] & BIT(1);
 		state = packet[1] & BIT(0);
 		x = ((packet[2] & 0x0F) << 8) | packet[3];
 		y = (((packet[2] >> 4) & 0x0F) << 8) |
 			packet[4];
-		size = packet[6];
-		pressure_stage = (packet[7] & 0xF0) >> 4;
 		pressure = ((packet[7] & 0x0F) << 8) |
 			packet[8];
 		touch_major = packet[9];
-- 
2.25.1

[PATCH v2 3/4] input: touchscreen: usbtouchscreen: Remove unused variable 'ret'

[Lee Jones]

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);
 
 	if (!usbtouch->type->max_xc) {
 		usbtouch->type->max_xc = 2 * x_len;
-- 
2.25.1

[PATCH v2 4/4] input: touchscreen: surface3_spi: Remove set but unused variable 'timestamp'

[Lee Jones]

Fixes the following W=1 kernel build warning(s):

 drivers/input/touchscreen/surface3_spi.c: In function ‘surface3_spi_process_touch’:
 drivers/input/touchscreen/surface3_spi.c:97:6: warning: variable ‘timestamp’ set but not used [-Wunused-but-set-variable]

Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Henrik Rydberg <rydberg@bitmath.org>
Cc: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Cc: linux-input@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 drivers/input/touchscreen/surface3_spi.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/input/touchscreen/surface3_spi.c b/drivers/input/touchscreen/surface3_spi.c
index 731454599fcee..1da23e5585a0d 100644
--- a/drivers/input/touchscreen/surface3_spi.c
+++ b/drivers/input/touchscreen/surface3_spi.c
@@ -94,9 +94,7 @@ static void surface3_spi_report_touch(struct surface3_ts_data *ts_data,
 
 static void surface3_spi_process_touch(struct surface3_ts_data *ts_data, u8 *data)
 {
-	u16 timestamp;
 	unsigned int i;
-	timestamp = get_unaligned_le16(&data[15]);
 
 	for (i = 0; i < 13; i++) {
 		struct surface3_ts_data_finger *finger;
-- 
2.25.1

Re: [PATCH v2 2/4] input: touchscreen: melfas_mip4: Remove a bunch of unused variables

[Dmitry Torokhov]

Hi Lee,

On Thu, Nov 26, 2020 at 01:36:05PM +0000, Lee Jones wrote:
> Fixes the following W=1 kernel build warning(s):
> 
>  drivers/input/touchscreen/melfas_mip4.c: In function ‘mip4_report_touch’:
>  drivers/input/touchscreen/melfas_mip4.c:474:5: warning: variable ‘size’ set but not used [-Wunused-but-set-variable]
>  drivers/input/touchscreen/melfas_mip4.c:472:5: warning: variable ‘pressure_stage’ set but not used [-Wunused-but-set-variable]
>  drivers/input/touchscreen/melfas_mip4.c:469:7: warning: variable ‘palm’ set but not used [-Wunused-but-set-variable]
>  drivers/input/touchscreen/melfas_mip4.c:468:7: warning: variable ‘hover’ set but not used [-Wunused-but-set-variable]
> 
> Cc: Sangwon Jee <jeesw@melfas.com>
> Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
> Cc: Henrik Rydberg <rydberg@bitmath.org>
> Cc: linux-input@vger.kernel.org
> Signed-off-by: Lee Jones <lee.jones@linaro.org>
> ---
>  drivers/input/touchscreen/melfas_mip4.c | 11 -----------
>  1 file changed, 11 deletions(-)
> 
> diff --git a/drivers/input/touchscreen/melfas_mip4.c b/drivers/input/touchscreen/melfas_mip4.c
> index f67efdd040b24..9c98759098c7a 100644
> --- a/drivers/input/touchscreen/melfas_mip4.c
> +++ b/drivers/input/touchscreen/melfas_mip4.c
> @@ -465,13 +465,9 @@ static void mip4_report_keys(struct mip4_ts *ts, u8 *packet)
>  static void mip4_report_touch(struct mip4_ts *ts, u8 *packet)
>  {
>  	int id;
> -	bool hover;
> -	bool palm;

So __always_unused did not work?

-- 
Dmitry

Re: [PATCH v2 3/4] input: touchscreen: usbtouchscreen: Remove unused variable 'ret'

[Dmitry Torokhov]

Hi Lee,

On Thu, Nov 26, 2020 at 01:36:06PM +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 thought you were going to add error handling here?

>  
>  	if (!usbtouch->type->max_xc) {
>  		usbtouch->type->max_xc = 2 * x_len;
> -- 
> 2.25.1
> 

Thanks.

-- 
Dmitry

Re: [PATCH v2 3/4] input: touchscreen: usbtouchscreen: Remove unused variable 'ret'

[Lee Jones]

On Sat, 28 Nov 2020, Dmitry Torokhov wrote:

> Hi Lee,
> 
> On Thu, Nov 26, 2020 at 01:36:06PM +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 thought you were going to add error handling here?

Hmm... I thought I handed all of the review comments!

Will look into this again on Monday.

> >  	if (!usbtouch->type->max_xc) {
> >  		usbtouch->type->max_xc = 2 * x_len;
> 
> Thanks.
> 

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