This fixes a regression introduced in
3b57ca0f80c5c8994b5b1e3d3f904cfe727951f2.
The data[6] byte contains either 1 or -1 depending on the whether the
mouse wheel on older wacom tablets is moved down (1) or up (-1). The
patch introduced in the above commit changed the cast from (signed char)
to (signed). When cast as a signed integer and negated, the value of -1
(stored in the byte as 0xff) became -255 rather than 1. This patch
reverts the cast to a (signed char) and also removes an unnecessary
(signed) cast, as all the values operated on are bitmasked.
Signed-off-by: Mike Auty <ikelos@xxxxxxxxxx>
Reviewed-by: Ping Cheng <pingc@xxxxxxxxx>
---
drivers/input/tablet/wacom_wac.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/input/tablet/wacom_wac.c b/drivers/input/tablet/wacom_wac.c
index 415f630..d1a883d 100644
--- a/drivers/input/tablet/wacom_wac.c
+++ b/drivers/input/tablet/wacom_wac.c
@@ -210,10 +210,10 @@ static int wacom_graphire_irq(struct wacom_wac *wacom)
if (features->type == WACOM_G4 ||
features->type == WACOM_MO) {
input_report_abs(input, ABS_DISTANCE, data[6] & 0x3f);
- rw = (signed)(data[7] & 0x04) - (data[7] & 0x03);
+ rw = (data[7] & 0x04) - (data[7] & 0x03);
} else {
input_report_abs(input, ABS_DISTANCE, data[7] & 0x3f);
- rw = -(signed)data[6];
+ rw = -(signed char)data[6];
}
input_report_rel(input, REL_WHEEL, rw);
}
--
1.7.2.2
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