linux-kernel - [PATCH 2/3] Input: Remove redundant field elantech

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, 29 Sep 2022 01:21:18 -0700
From:   Eirin Nya <nyanpasu256@...il.com>
To:     linux-input@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org
Subject: [PATCH 2/3] Input: Remove redundant field elantech_data::width

elantech_data::width is copied from elantech_device_info::width, and
neither is mutated after initialization. So remove the redundant
variable to prevent future bugs.

Signed-off-by: Eirin Nya <nyanpasu256@...il.com>
---
 drivers/input/mouse/elantech.c | 4 +---
 drivers/input/mouse/elantech.h | 1 -
 2 files changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/input/mouse/elantech.c b/drivers/input/mouse/elantech.c
index 79e31611fc..263779c031 100644
--- a/drivers/input/mouse/elantech.c
+++ b/drivers/input/mouse/elantech.c
@@ -691,7 +691,7 @@ static void process_packet_head_v4(struct psmouse *psmouse)
 	input_report_abs(dev, ABS_MT_POSITION_X, etd->mt[id].x);
 	input_report_abs(dev, ABS_MT_POSITION_Y, etd->mt[id].y);
 	input_report_abs(dev, ABS_MT_PRESSURE, pres);
-	input_report_abs(dev, ABS_MT_TOUCH_MAJOR, traces * etd->width);
+	input_report_abs(dev, ABS_MT_TOUCH_MAJOR, traces * etd->info.width);
 	/* report this for backwards compatibility */
 	input_report_abs(dev, ABS_TOOL_WIDTH, traces);
 
@@ -1253,8 +1253,6 @@ static int elantech_set_input_params(struct psmouse *psmouse)
 		input_abs_set_res(dev, ABS_MT_POSITION_Y, info->y_res);
 	}
 
-	etd->width = width;
-
 	return 0;
 }
 
diff --git a/drivers/input/mouse/elantech.h b/drivers/input/mouse/elantech.h
index 1ec004f72d..fb093134ea 100644
--- a/drivers/input/mouse/elantech.h
+++ b/drivers/input/mouse/elantech.h
@@ -180,7 +180,6 @@ struct elantech_data {
 	unsigned char reg_25;
 	unsigned char reg_26;
 	unsigned int single_finger_reports;
-	unsigned int width;
 	struct finger_pos mt[ETP_MAX_FINGERS];
 	unsigned char parity[256];
 	struct elantech_device_info info;
-- 
2.37.3