From: Jason Gerecke <killertofu@gmail.com>
To: linux-input@vger.kernel.org,
linuxwacom-devel@lists.sourceforge.net, pinglinux@gmail.com,
skomra@gmail.com, dmitry.torokhov@gmail.com
Cc: Jason Gerecke <killertofu@gmail.com>
Subject: [PATCH 3/4] Input: wacom: References to 'wacom->data' should use 'unsigned char*'
Date: Thu, 30 Jan 2014 10:48:47 -0800 [thread overview]
Message-ID: <1391107728-1306-3-git-send-email-killertofu@gmail.com> (raw)
In-Reply-To: <1391107728-1306-1-git-send-email-killertofu@gmail.com>
'wacom->data' contains raw binary data and can lead to unexpected
behavior if a byte under examination happens to have its MSB set.
Signed-off-by: Jason Gerecke <killertofu@gmail.com>
---
drivers/input/tablet/wacom_wac.c | 27 +++++++++------------------
1 file changed, 9 insertions(+), 18 deletions(-)
diff --git a/drivers/input/tablet/wacom_wac.c b/drivers/input/tablet/wacom_wac.c
index 05f371d..9ff5613 100644
--- a/drivers/input/tablet/wacom_wac.c
+++ b/drivers/input/tablet/wacom_wac.c
@@ -178,10 +178,9 @@ static int wacom_ptu_irq(struct wacom_wac *wacom)
static int wacom_dtu_irq(struct wacom_wac *wacom)
{
- struct wacom_features *features = &wacom->features;
- char *data = wacom->data;
+ unsigned char *data = wacom->data;
struct input_dev *input = wacom->input;
- int prox = data[1] & 0x20, pressure;
+ int prox = data[1] & 0x20;
dev_dbg(input->dev.parent,
"%s: received report #%d", __func__, data[0]);
@@ -198,10 +197,7 @@ static int wacom_dtu_irq(struct wacom_wac *wacom)
input_report_key(input, BTN_STYLUS2, data[1] & 0x10);
input_report_abs(input, ABS_X, le16_to_cpup((__le16 *)&data[2]));
input_report_abs(input, ABS_Y, le16_to_cpup((__le16 *)&data[4]));
- pressure = ((data[7] & 0x01) << 8) | data[6];
- if (pressure < 0)
- pressure = features->pressure_max + pressure + 1;
- input_report_abs(input, ABS_PRESSURE, pressure);
+ input_report_abs(input, ABS_PRESSURE, ((data[7] & 0x01) << 8) | data[6]);
input_report_key(input, BTN_TOUCH, data[1] & 0x05);
if (!prox) /* out-prox */
wacom->id[0] = 0;
@@ -906,7 +902,7 @@ static int int_dist(int x1, int y1, int x2, int y2)
static int wacom_24hdt_irq(struct wacom_wac *wacom)
{
struct input_dev *input = wacom->input;
- char *data = wacom->data;
+ unsigned char *data = wacom->data;
int i;
int current_num_contacts = data[61];
int contacts_to_send = 0;
@@ -959,7 +955,7 @@ static int wacom_24hdt_irq(struct wacom_wac *wacom)
static int wacom_mt_touch(struct wacom_wac *wacom)
{
struct input_dev *input = wacom->input;
- char *data = wacom->data;
+ unsigned char *data = wacom->data;
int i;
int current_num_contacts = data[2];
int contacts_to_send = 0;
@@ -1038,7 +1034,7 @@ static int wacom_tpc_mt_touch(struct wacom_wac *wacom)
static int wacom_tpc_single_touch(struct wacom_wac *wacom, size_t len)
{
- char *data = wacom->data;
+ unsigned char *data = wacom->data;
struct input_dev *input = wacom->input;
bool prox;
int x = 0, y = 0;
@@ -1074,10 +1070,8 @@ static int wacom_tpc_single_touch(struct wacom_wac *wacom, size_t len)
static int wacom_tpc_pen(struct wacom_wac *wacom)
{
- struct wacom_features *features = &wacom->features;
- char *data = wacom->data;
+ unsigned char *data = wacom->data;
struct input_dev *input = wacom->input;
- int pressure;
bool prox = data[1] & 0x20;
if (!wacom->shared->stylus_in_proximity) /* first in prox */
@@ -1093,10 +1087,7 @@ static int wacom_tpc_pen(struct wacom_wac *wacom)
input_report_key(input, BTN_STYLUS2, data[1] & 0x10);
input_report_abs(input, ABS_X, le16_to_cpup((__le16 *)&data[2]));
input_report_abs(input, ABS_Y, le16_to_cpup((__le16 *)&data[4]));
- pressure = ((data[7] & 0x01) << 8) | data[6];
- if (pressure < 0)
- pressure = features->pressure_max + pressure + 1;
- input_report_abs(input, ABS_PRESSURE, pressure);
+ input_report_abs(input, ABS_PRESSURE, ((data[7] & 0x01) << 8) | data[6]);
input_report_key(input, BTN_TOUCH, data[1] & 0x05);
input_report_key(input, wacom->tool[0], prox);
return 1;
@@ -1107,7 +1098,7 @@ static int wacom_tpc_pen(struct wacom_wac *wacom)
static int wacom_tpc_irq(struct wacom_wac *wacom, size_t len)
{
- char *data = wacom->data;
+ unsigned char *data = wacom->data;
dev_dbg(wacom->input->dev.parent,
"%s: received report #%d\n", __func__, data[0]);
--
1.8.5.3
next prev parent reply other threads:[~2014-01-30 18:48 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-30 18:48 [PATCH 1/4] Input: wacom: Use full 32-bit HID Usage value in switch statement Jason Gerecke
2014-01-30 18:48 ` [PATCH 2/4] Input: wacom: Override 'pressure_max' with value from HID_USAGE_PRESSURE Jason Gerecke
[not found] ` <1391107728-1306-2-git-send-email-killertofu-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2014-02-27 18:27 ` Aaron Armstrong Skomra
2014-02-27 18:39 ` Aaron Armstrong Skomra
2014-01-30 18:48 ` Jason Gerecke [this message]
[not found] ` <1391107728-1306-3-git-send-email-killertofu-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2014-02-27 18:28 ` [PATCH 3/4] Input: wacom: References to 'wacom->data' should use 'unsigned char*' Aaron Armstrong Skomra
2014-02-27 18:40 ` Aaron Armstrong Skomra
2014-01-30 18:48 ` [PATCH 4/4] Input: wacom: Handle 1024 pressure levels in wacom_tpc_pen Jason Gerecke
[not found] ` <1391107728-1306-4-git-send-email-killertofu-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2014-02-27 18:28 ` Aaron Armstrong Skomra
2014-02-27 18:40 ` Aaron Armstrong Skomra
2014-02-27 18:37 ` [PATCH 1/4] Input: wacom: Use full 32-bit HID Usage value in switch statement Aaron Armstrong Skomra
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