[PATCH 03/11] aiptek: Fix probable mask then right shift defects

From: Joe Perches
Date: Mon Oct 27 2014 - 01:27:56 EST


Precedence of & and >> is not the same and is not left to right.
shift has higher precedence and should be done after the mask.

Here the shifts are unnecessary and a non-zero value can be used
as the test to set 1 or zero.

Signed-off-by: Joe Perches <joe@xxxxxxxxxxx>
---
drivers/input/tablet/aiptek.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/input/tablet/aiptek.c b/drivers/input/tablet/aiptek.c
index e7f966d..dee2bb9 100644
--- a/drivers/input/tablet/aiptek.c
+++ b/drivers/input/tablet/aiptek.c
@@ -489,9 +489,9 @@ static void aiptek_irq(struct urb *urb)
*/
jitterable = data[1] & 0x07;

- left = (data[1] & aiptek->curSetting.mouseButtonLeft >> 2) != 0 ? 1 : 0;
- right = (data[1] & aiptek->curSetting.mouseButtonRight >> 2) != 0 ? 1 : 0;
- middle = (data[1] & aiptek->curSetting.mouseButtonMiddle >> 2) != 0 ? 1 : 0;
+ left = data[1] & aiptek->curSetting.mouseButtonLeft ? 1 : 0;
+ right = data[1] & aiptek->curSetting.mouseButtonRight ? 1 : 0;
+ middle = data[1] & aiptek->curSetting.mouseButtonMiddle ? 1 : 0;

input_report_key(inputdev, BTN_LEFT, left);
input_report_key(inputdev, BTN_MIDDLE, middle);
--
2.1.2

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