linux-kernel - [PATCH 5/7] HID: uclogic: Access pen/frame params directly in raw

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

Date:   Thu, 10 Feb 2022 20:04:35 +0100
From:   José Expósito <jose.exposito89@...il.com>
To:     jikos@...nel.org
Cc:     benjamin.tissoires@...hat.com, spbnick@...il.com,
        linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
        José Expósito <jose.exposito89@...il.com>
Subject: [PATCH 5/7] HID: uclogic: Access pen/frame params directly in raw_event handling

From: Nikolai Kondrashov <spbnick@...il.com>

Simplify the raw event handling code by accessing the
uclogic_params_pen/uclogic_params_frame structs directly.

Signed-off-by: Nikolai Kondrashov <spbnick@...il.com>
Signed-off-by: José Expósito <jose.exposito89@...il.com>
---
 drivers/hid/hid-uclogic-core.c | 24 +++++++++++-------------
 1 file changed, 11 insertions(+), 13 deletions(-)

diff --git a/drivers/hid/hid-uclogic-core.c b/drivers/hid/hid-uclogic-core.c
index 9187fd835a46..56b76d9b46af 100644
--- a/drivers/hid/hid-uclogic-core.c
+++ b/drivers/hid/hid-uclogic-core.c
@@ -259,13 +259,13 @@ static int uclogic_resume(struct hid_device *hdev)
 static int uclogic_raw_event_pen(struct uclogic_drvdata *drvdata,
 					u8 *data, int size)
 {
-	struct uclogic_params *params = &drvdata->params;
+	struct uclogic_params_pen *pen = &drvdata->params.pen;
 
 	WARN_ON(drvdata == NULL);
 	WARN_ON(data == NULL && size != 0);
 
 	/* If in-range reports are inverted */
-	if (params->pen.inrange ==
+	if (pen->inrange ==
 		UCLOGIC_PARAMS_PEN_INRANGE_INVERTED) {
 		/* Invert the in-range bit */
 		data[1] ^= 0x40;
@@ -274,7 +274,7 @@ static int uclogic_raw_event_pen(struct uclogic_drvdata *drvdata,
 	 * If report contains fragmented high-resolution pen
 	 * coordinates
 	 */
-	if (size >= 10 && params->pen.fragmented_hires) {
+	if (size >= 10 && pen->fragmented_hires) {
 		u8 pressure_low_byte;
 		u8 pressure_high_byte;
 
@@ -296,7 +296,7 @@ static int uclogic_raw_event_pen(struct uclogic_drvdata *drvdata,
 		data[9] = pressure_high_byte;
 	}
 	/* If we need to emulate in-range detection */
-	if (params->pen.inrange == UCLOGIC_PARAMS_PEN_INRANGE_NONE) {
+	if (pen->inrange == UCLOGIC_PARAMS_PEN_INRANGE_NONE) {
 		/* Set in-range bit */
 		data[1] |= 0x40;
 		/* (Re-)start in-range timeout */
@@ -304,7 +304,7 @@ static int uclogic_raw_event_pen(struct uclogic_drvdata *drvdata,
 				jiffies + msecs_to_jiffies(100));
 	}
 	/* If we report tilt and Y direction is flipped */
-	if (size >= 12 && params->pen.tilt_y_flipped)
+	if (size >= 12 && pen->tilt_y_flipped)
 		data[11] = -data[11];
 
 	return 0;
@@ -323,21 +323,19 @@ static int uclogic_raw_event_pen(struct uclogic_drvdata *drvdata,
 static int uclogic_raw_event_frame(struct uclogic_drvdata *drvdata,
 					u8 *data, int size)
 {
-	struct uclogic_params *params = &drvdata->params;
+	struct uclogic_params_frame *frame = &drvdata->params.frame;
 
 	WARN_ON(drvdata == NULL);
 	WARN_ON(data == NULL && size != 0);
 
 	/* If need to, and can, set pad device ID for Wacom drivers */
-	if (params->frame.dev_id_byte > 0 &&
-	    params->frame.dev_id_byte < size) {
-		data[params->frame.dev_id_byte] = 0xf;
+	if (frame->dev_id_byte > 0 && frame->dev_id_byte < size) {
+		data[frame->dev_id_byte] = 0xf;
 	}
 	/* If need to, and can, read rotary encoder state change */
-	if (params->frame.re_lsb > 0 &&
-	    params->frame.re_lsb / 8 < size) {
-		unsigned int byte = params->frame.re_lsb / 8;
-		unsigned int bit = params->frame.re_lsb % 8;
+	if (frame->re_lsb > 0 && frame->re_lsb / 8 < size) {
+		unsigned int byte = frame->re_lsb / 8;
+		unsigned int bit = frame->re_lsb % 8;
 
 		u8 change;
 		u8 prev_state = drvdata->re_state;
-- 
2.25.1